Multipath reduction system

Claim 2

A signal processing system for reducing distortion effects in communication receivers due to multipath, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; biased envelope detector means coupled to receive said adaptive array output signal for generating the biased amplitude envelope of said adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive adaptive array output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 3

A system as in claim 1 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 4

A signal processing system for reducing distortion effects in communication receivers due to multipath, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; biased envelope detector means coupled to receive said adaptive array output signal for generating the biased amplitude envelope of said adaptive array output signal; amplitude limiter means coupled to receive the said adaptive array output signal for generating an amplitude limited adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive amplitude limiter means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefine the weight factors.

Claim 5

A signal processing system for reducing distortion effects in communication receivers due to multipath, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; biased envelope detector means coupled to receive said adaptive array output signal for generating the biased amplitude envelope of said adaptive array output signal; amplitude limiter means coupled to receive the said adaptive array output signal for generating an amplitude limited adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive amplitude limiter means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefine the weight factors.

Claim 6

A system as in claim 3 further means includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 7

A signal processing system for reducing distortion effects in communication receivers due to multipath, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; biasing means coupled to receive the envelope detector means output signal for biasing the envelope detector means output signal; divider means coupled to receive the adaptive array output signal and coupled to receive the envelope detector means output signal for dividing the adaptive array output signal by the envelope detector means output signal; and first multiplier means coupled to receive biasing means output signal and coupled to receive divider means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 8

A signal processing system for reducing distortion effects in communication receivers due to multipath, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; biasing means coupled to receive the envelope detector means output signal for biasing the envelope detector means output signal; divider means coupled to receive the adaptive array output signal and coupled to receive the envelope detector means output signal for dividing the adaptive array output signal by the envelope detector means output signal; and first multiplier means coupled to receive biasing means output signal and coupled to receive divider means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 9

A system as in claim 5 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 10

A signal processing system for reducing distortion effects in communication receivers due to multipath, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; third multiplier means coupled to receive biased envelope detector means output signal into both inputs for squaring the envelope detector means output signal; first multiplier means coupled to receive the third multiplier means output signal and coupled to receive the adaptive array output signal for generating the product of the third multiplier means output signal and said adaptive array output signal; and subtractor means that is coupled to receive the first multiplier means output signal and coupled to receive the said adaptive array output signal for subtracting the said adaptive array output signal from the first multiplier means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 11

A signal processing system for reducing distortion effects in communication receivers due to multipath, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; third multiplier means coupled to receive biased envelope detector means output signal into both inputs for squaring the envelope detector means output signal; first multiplier means coupled to receive the third multiplier means output signal and coupled to receive the adaptive array output signal for generating the product of the third multiplier means output signal and said adaptive array output signal; and subtractor means that is coupled to receive the first multiplier means output signal and coupled to receive the said adaptive array output signal for subtracting the said adaptive array output signal from the first multiplier means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 12

A system as in claim 7 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 13

A signal processing system for reducing distortion effects in communication receivers due to multipath, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; first multiplier means coupled to receive the envelope detector means output signal and coupled to receive the adaptive array output signal for generating the product of the envelope detector means output signal and said adaptive array output signal; and subtractor means that is coupled to receive the first multiplier means output signal and coupled to receive the adaptive array output signal for subtracting the adaptive array output signal from the first multiplier means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 14

A signal processing system for reducing distortion effects in communication receivers due to multipath, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; first multiplier means coupled to receive the envelope detector means output signal and coupled to receive the adaptive array output signal for generating the product of the envelope detector means output signal and said adaptive array output signal; and subtractor means that is coupled to receive the first multiplier means output signal and coupled to receive the adaptive array output signal for subtracting the adaptive array output signal from the first multiplier means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 15

A system as in claim 9 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 16

A signal processing system for reducing distortion effects due to multiple signal images, said system comprising: adaptive filter means having: one signal input element; weighting means coupled to the signal input element for selectively weighting the received signal by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive filter output signal; biased envelope detector means coupled to receive said adaptive filter output signal for generating the biased amplitude envelope of said adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive said adaptive array output signal for generating the feedback signal; said adaptive filter means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 17

A signal processing system for reducing distortion effects due to multiple signal images, said system comprising: adaptive filter means having: one signal input element; weighting means coupled to the signal input element for selectively weighting the received signal by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive filter output signal; biased envelope detector means coupled to receive said adaptive filter output signal for generating the biased amplitude envelope of said adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive said adaptive array output signal for generating the feedback signal; said adaptive filter means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 18

A system as in claim 11 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 19

A signal processing system for reducing distortion effects due to multiple signal images, said system comprising: adaptive filter means having: one input signal element; weighting means coupled to the input element for selectively weighting the received signal by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive filter output signal; envelope detector means coupled to receive said adaptive filter output signal for generating the amplitude envelope of said adaptive filter output signal; biasing means coupled to receive the envelope detector means output signal for generating a biased envelope detector means output signal; divider means coupled to receive the adaptive filter output signal and coupled to receive the envelope detector means output signal which divides the adaptive filter output signal by the envelope detector means output signal; and first multiplier means coupled to receive biasing means output signal and coupled to receive divider means output signal for generating a feedback signal; said adaptive filter means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 20

A signal processing system for reducing distortion effects due to multiple signal images, said system comprising: adaptive filter means having: one input signal element; weighting means coupled to the input element for selectively weighting the received signal by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive filter output signal; envelope detector means coupled to receive said adaptive filter output signal for generating the amplitude envelope of said adaptive filter output signal; biasing means coupled to receive the envelope detector means output signal for generating a biased envelope detector means output signal; divider means coupled to receive the adaptive filter output signal and coupled to receive the envelope detector means output signal which divides the adaptive filter output signal by the envelope detector means output signal; and first multiplier means coupled to receive biasing means output signal and coupled to receive divider means output signal for generating a feedback signal; said adaptive filter means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 21

A system as in claim 13 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 22

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; biased envelope detector means coupled to receive said adaptive array output signal for generating the biased amplitude envelope of said adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive adaptive array output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 23

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; biased envelope detector means coupled to receive said adaptive array output signal for generating the biased amplitude envelope of said adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive adaptive array output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 24

A system as in claim 15 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 25

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; biased envelope detector means coupled to receive said adaptive array output signal for generating the biased amplitude envelope of said adaptive array output signal; amplitude limiter means coupled to receive the said adaptive array output signal for generating an amplitude limited adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive amplitude limiter means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefine the weight factors.

Claim 26

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; biased envelope detector means coupled to receive said adaptive array output signal for generating the biased amplitude envelope of said adaptive array output signal; amplitude limiter means coupled to receive the said adaptive array output signal for generating an amplitude limited adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive amplitude limiter means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefine the weight factors.

Claim 27

A system as in claim 17 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 28

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; biasing means coupled to receive the envelope detector means output signal for biasing the envelope detector means output signal; divider means coupled to receive the adaptive array output signal and coupled to receive the envelope detector means output signal for dividing the adaptive array output signal by the envelope detector means output signal; and first multiplier means coupled to receive biasing means output signal and coupled to receive divider means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 29

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; biasing means coupled to receive the envelope detector means output signal for biasing the envelope detector means output signal; divider means coupled to receive the adaptive array output signal and coupled to receive the envelope detector means output signal for dividing the adaptive array output signal by the envelope detector means output signal; and first multiplier means coupled to receive biasing means output signal and coupled to receive divider means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 30

A system as in claim 19 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 31

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; third multiplier means coupled to receive biased envelope detector means output signal into both inputs for squaring the envelope detector means output signal; first multiplier means coupled to receive the third multiplier means output signal and coupled to receive the adaptive array output signal for generating the product of the third multiplier means output signal and said adaptive array output signal; and subtractor means that is coupled to receive the first multiplier means output signal and coupled to receive the said adaptive array output signal for subtracting the said adaptive array output signal from the first multiplier means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 32

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; third multiplier means coupled to receive biased envelope detector means output signal into both inputs for squaring the envelope detector means output signal; first multiplier means coupled to receive the third multiplier means output signal and coupled to receive the adaptive array output signal for generating the product of the third multiplier means output signal and said adaptive array output signal; and subtractor means that is coupled to receive the first multiplier means output signal and coupled to receive the said adaptive array output signal for subtracting the said adaptive array output signal from the first multiplier means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 33

A system as in claim 21 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 34

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; first multiplier means coupled to receive the envelope detector means output signal and coupled to receive the adaptive array output signal for generating the product of the envelope detector means output signal and said adaptive array output signal; and subtractor means that is coupled to receive the first multiplier means output signal and coupled to receive the adaptive array output signal for subtracting the adaptive array output signal from the first multiplier means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 35

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive array means having: at least two antenna elements; weighting means coupled to the antenna elements for selectively weighting the received signals by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive array output signal; envelope detector means coupled to receive said adaptive array output signal for generating the amplitude envelope of said adaptive array output signal; first multiplier means coupled to receive the envelope detector means output signal and coupled to receive the adaptive array output signal for generating the product of the envelope detector means output signal and said adaptive array output signal; and subtractor means that is coupled to receive the first multiplier means output signal and coupled to receive the adaptive array output signal for subtracting the adaptive array output signal from the first multiplier means output signal for generating a feedback signal; said adaptive array means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 36

A system as in claim 23 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 37

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive filter means having: one signal input element; weighting means coupled to the signal input element for selectively weighting the received signal by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive filter output signal; biased envelope detector means coupled to receive said adaptive filter output signal for generating the biased amplitude envelope of said adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive said adaptive array output signal for generating the feedback signal; said adaptive filter means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 38

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive filter means having: one signal input element; weighting means coupled to the signal input element for selectively weighting the received signal by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive filter output signal; biased envelope detector means coupled to receive said adaptive filter output signal for generating the biased amplitude envelope of said adaptive array output signal; and first multiplier means coupled to receive biased envelope detector means output signal and coupled to receive said adaptive array output signal for generating the feedback signal; said adaptive filter means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 39

A system as in claim 25 further includes a phase adjustment means for adjusting the phase of the feedback signal.

Claim 40

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive filter means having: one input signal element; weighting means coupled to the input element for selectively weighting the received signal by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive filter output signal; envelope detector means coupled to receive said adaptive filter output signal for generating the amplitude envelope of said adaptive filter output signal; biasing means coupled to receive the envelope detector means output signal for generating a biased envelope detector means output signal; divider means coupled to receive the adaptive filter output signal and coupled to receive the envelope detector means output signal which divides the adaptive filter output signal by the envelope detector means output signal; and first multiplier means coupled to receive biasing means output signal and coupled to receive divider means output signal for generating a feedback signal; said adaptive filter means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 41

A signal processing system for reducing distortion effects in communication receivers due to interference signals with signal amplitudes less than the signal amplitude of the signal of interest, said system comprising: adaptive filter means having: one input signal element; weighting means coupled to the input element for selectively weighting the received signal by a selected weight factor; and summing means for adding together the signals from the weighting means for generating an adaptive filter output signal; envelope detector means coupled to receive said adaptive filter output signal for generating the amplitude envelope of said adaptive filter output signal; biasing means coupled to receive the envelope detector means output signal for generating a biased envelope detector means output signal; divider means coupled to receive the adaptive filter output signal and coupled to receive the envelope detector means output signal which divides the adaptive filter output signal by the envelope detector means output signal; and first multiplier means coupled to receive biasing means output signal and coupled to receive divider means output signal for generating a feedback signal; said adaptive filter means also including a second multiplier means for each weighting means coupled to receive the feedback signal and coupled to receive the corresponding weighting means input signal, the output signal of which is coupled to a corresponding integrator means whose output signal is coupled to the corresponding weighting means for automatically redefining the weight factors.

Claim 42

A system as in claim 27 further includes a phase adjustment means for adjusting the phase of the feedback signal.