Poly-phase modulation systems

Claim 2

A phase modulator used in the generation of a multiphase carrier comprising phase shift means for providing orthogonal pairs of carrier reference signals on pairs of output leads for use as pairs of reference vectors, independent resistive elements coupled to each pair of said output leads to provide at the output of a resistive element a separately adjusted phase vector, and an addressable digital multiplexer coupled to the output of each resistive element to provide a phase modulated carrier representing input data to said digital multiplexer.

Claim 3

In combination: a phase splitting element adapted to provide a plurality of pairs of output signals in phase quadrature on output buses; a digital multiplexer for selecting parallel data inputs to a serial output; and a plurality of divider resistors connected from one output bus to another to provide at the output of each divider resistor a signal representing a predetermined phase angle, the output of each divider resistor being connected to an input terminal on said digital multiplexer, whereby the phase angle setting of each divider resistor is made without affecting the phase angle setting of other divider resistors, said digital multiplexer adapted to select for transmission the signal having a predetermined phase angle in response to a coded input data signal.

Claim 4

In combination: a phase splitting element adapted to provide a plurality of pairs of output signals in phase quadrature on output buses; a digital multiplexer for selecting parallel data inputs to a serial output; and a plurality of divider resistors connected from one output bus to another to provide at the output of each divider resistor a signal representing a predetermined phase angle, the output of each divider resistor being connected to an input terminal on said digital multiplexer, whereby the phase angle setting of each divider resistor is made without affecting the phase angle setting of other divider resistors, said digital multiplexer adapted to select for transmission the signal having a predetermined phase angle in response to a coded input data signal.

Claim 5

In combination: a digital multiplexer; phase splitting elements having a plurality of individual leads having output signals, the phase of pairs of said output signals being derived in phase quadrature; a resistive divider connected between pairs of said individual leads, the tap of each resistive divider being connected to an input terminal of said digital multiplexer, whereby the setting of said tap determines the relative phase of signals transmitted from said multiplexer in response to input coded data.

Claim 6

In combination: a digital multiplexer; phase splitting elements having a plurality of individual leads having output signals, the phase of pairs of said output signals being derived in phase quadrature; a resistive divider connected between pairs of said individual leads, the tap of each resistive divider being connected to an input terminal of said digital multiplexer, whereby the setting of said tap determines the relative phase of signals transmitted from said multiplexer in response to input coded data.

Claim 7

In combination: a digital multiplexer; phase splitting elements having a plurality of individual leads having output signals, the phase of pairs of said output signals being derived in phase quadrature; a resistive divider connected between pairs of said individual leads, the tap on each resistive divider being connected to an input terminal of said digital multiplexer, whereby the setting of said tap determines the relative phase of signals transmitted from said multiplexer in response to input coded data; means for transmitting said phase related signals at a predetermined frequency, means for receiving said transmitted signals and converting said received signals to input coded data, said receiving means including a resistive divider network, a second digital multiplexer fed by said resistive divider network in a manner adapted to propagate a phase adjusted signal applied to said second digital multiplexer, whereby the phase of said received signals are adjusted to the phase of said transmitted signals.

Claim 8

In combination: a digital multiplexer; phase splitting elements having a plurality of individual leads having output signals, the phase of pairs of said output signals being derived in phase quadrature; a resistive divider connected between pairs of said individual leads, the tap on each resistive divider being connected to an input terminal of said digital multiplexer, whereby the setting of said tap determines the relative phase of signals transmitted from said multiplexer in response to input coded data; means for transmitting said phase related signals at a predetermined frequency, means for receiving said transmitted signals and converting said received signals to input coded data, said receiving means including a resistive divider network, a second digital multiplexer fed by said resistive divider network in a manner adapted to propagate a phase adjusted signal applied to said second digital multiplexer, whereby the phase of said received signals are adjusted to the phase of said transmitted signals.

Claim 9

In combination: a digital multiplexer; phase splitting elements producing on individual leads corresponding output signals having quadrature phase relationship; a plurality of resistive dividers connected from one to another of said individual leads; and an output tap on each divider connected to an input on said digital multiplexer to transmit a signal having a phase related to input data applied to said digital multiplexer whereby a precise setting of the phase of a transmitted signal is obtained.

Claim 10

In combination: a digital multiplexer; phase splitting elements producing on individual leads corresponding output signals having quadrature phase relationship; a plurality of resistive dividers connected from one to another of said individual leads; and an output tap on each divider connected to an input on said digital multiplexer to transmit a signal having a phase related to input data applied to said digital multiplexer whereby a precise setting of the phase of a transmitted signal is obtained.

Claim 15

A digital communication system having a phase modulator for generating a multiphase carrier comprising: means for providing orthogonal pairs of carrier reference signals on pairs of output leads for use as reference vectors, independent resistive elements coupled to each pair of said output leads to provide at the output of a resistive element a separately adjusted phase vector; an addressable digital multiplexer coupled to the output of each resistive element to provide a phase modulated carrier representing input data to said digital multiplexer; means for transmitting said phase modulated carrier at a predetermined frequency; means for receiving said phase modulated carrier; said receiving means including polyphase demodulator means to provide a demultiplexed output of a plurality of digital data lines carrying output data corresponding to said input data; means for converting said output data to original input data; and means for varying each resistive element independently of another, whereby the phase angle setting of each resistive element is made without affecting the phase angle setting of the other resistive elements.

Claim 16

A digital communication system having a phase modulator for generating a multiphase carrier comprising: means for providing orthogonal pairs of carrier reference signals on pairs of output leads for use as reference vectors, independent resistive elements coupled to each pair of said output leads to provide at the output of a resistive element a separately adjusted phase vector; an addressable digital multiplexer coupled to the output of each resistive element to provide a phase modulated carrier representing input data to said digital multiplexer; means for transmitting said phase modulated carrier at a predetermined frequency; means for receiving said phase modulated carrier; said receiving means including polyphase demodulator means to provide a demultiplexed output of a plurality of digital data lines carrying output data corresponding to said input data; means for converting said output data to original input data; and means for varying each resistive element independently of another, whereby the phase angle setting of each resistive element is made without affecting the phase angle setting of the other resistive elements.

Claim 17

A digital communication system having a phase modulator for generating a multiphase carrier comprising: multiplexer means for converting parallel information channels to a plurality of channels of pulse coded signals; means for providing orthogonal pairs of carrier reference signals derived from a source of oscillation; resistive means for adjusting the relative phase angle of individual vectors associated with the pairs of carrier reference signals; a digital multiplexer having inputs connected in operative relationship to the adjusted output signals of the resistive means; and said digital multiplexer adapted to select in a predetermined sequence a plurality of said pulse coded signals to transmit a phase modulated carrier representative of input data to said digital multiplexer.

Claim 18

A digital communication system having a phase modulator for generating a multiphase carrier comprising: multiplexer means for converting parallel information channels to a plurality of channels of pulse coded signals; means for providing orthogonal pairs of carrier reference signals derived from a source of oscillation; resistive means for adjusting the relative phase angle of individual vectors associated with the pairs of carrier reference signals; a digital multiplexer having inputs connected in operative relationship to the adjusted output signals of the resistive means; and said digital multiplexer adapted to select in a predetermined sequence a plurality of said pulse coded signals to transmit a phase modulated carrier representative of input data to said digital multiplexer.

Claim 19

A digital communication system having a phase modulator for generating a muliphase carrier comprising: multiplexer means for converting a parallel information channels to a plurality of channels of pulse coded signals; means for providing pairs of orthogonal carrier reference signals derived from a source of oscillation; resistive means for adjusting the relative phase angle of individual vectors associated with said pairs of carrier reference signals; a digital multiplexer having parallel inputs connected in operative relationship to the adjusted output signals of the resistive means; said digital multiplexer adapted to select individual vectors in response to a plurality of said pulse coded signals to transmit a phase modulated carrier representative of input data to said digital multiplexer; and means for transmitting said phase modulated carrier at a predetermined frequency.

Claim 20

A digital communication system having a phase modulator for generating a muliphase carrier comprising: multiplexer means for converting a parallel information channels to a plurality of channels of pulse coded signals; means for providing pairs of orthogonal carrier reference signals derived from a source of oscillation; resistive means for adjusting the relative phase angle of individual vectors associated with said pairs of carrier reference signals; a digital multiplexer having parallel inputs connected in operative relationship to the adjusted output signals of the resistive means; said digital multiplexer adapted to select individual vectors in response to a plurality of said pulse coded signals to transmit a phase modulated carrier representative of input data to said digital multiplexer; and means for transmitting said phase modulated carrier at a predetermined frequency.

Claim 21

A digital communication system having a phase modulator for generating a multiphase carrier comprising: multiplexer means for converting parallel information channels to a plurality of channels of pulse coded signals; means for providing orthogonal pairs of carrier reference signals derived from a source of oscillation; resistive means for adjusting the relative phase angle of an output signal derived from the individual vectors associated with the pairs of carrier reference signals; a digital multiplexer having parallel inputs connected in operative relationship to the adjusted output signals of the resistive means; said digital multiplexer adapted to select for transmission a plurality of said pulse coded signals in a predetermined sequence to provide a phase modulated carrier representative of input data to said digital multiplexer; means for transmitting said phase modulated carrier at a predetermined frequency; means for receiving said phase modulated carrier at a predetermined frequency, said means including a polyphase demodulator providing a plurality of output signals adapted to be independently adjusted to reproduce the phase angle of carrier signals transmitted by said phase modulated carrier, thereby to synchronize received data on said phase modulated carrier to that of the transmitted data; and means to convert said synchronized received data into information signals corresponding to said originally transmitted pulse coded signals.

Claim 22

A digital communication system having a phase modulator for generating a multiphase carrier comprising: multiplexer means for converting parallel information channels to a plurality of channels of pulse coded signals; means for providing orthogonal pairs of carrier reference signals derived from a source of oscillation; resistive means for adjusting the relative phase angle of an output signal derived from the individual vectors associated with the pairs of carrier reference signals; a digital multiplexer having parallel inputs connected in operative relationship to the adjusted output signals of the resistive means; said digital multiplexer adapted to select for transmission a plurality of said pulse coded signals in a predetermined sequence to provide a phase modulated carrier representative of input data to said digital multiplexer; means for transmitting said phase modulated carrier at a predetermined frequency; means for receiving said phase modulated carrier at a predetermined frequency, said means including a polyphase demodulator providing a plurality of output signals adapted to be independently adjusted to reproduce the phase angle of carrier signals transmitted by said phase modulated carrier, thereby to synchronize received data on said phase modulated carrier to that of the transmitted data; and means to convert said synchronized received data into information signals corresponding to said originally transmitted pulse coded signals.

Claim 23

The system of claim 11 wherein: said polyphase de-modulator means in said receiving means operates in conjunction with timing means and a phase locked loop, including phase detector means and a carrier oscillator, said phase detector means varying the frequency of said carrier oscillator to maintain phase coherence with said phase modulated carrier.

Claim 24

The combination of claim 4 wherein: the means for transmitting phase related signals includes a serial-to-parallel converter for providing a plurality of channels of input coded data at the input of said digital multiplexer, an asynchronous combiner adapted to convert the data outputs from a plurality of digital multiplex means to a combined data signal at the input of said serial-to-parallel converter, the input of said multiplex means being coupled to the outputs of a plurality of parallel data channels whereby data is fed to said multiplex means at a lower data rate than the multiplexed output data is fed to said asynchronous combiner.

Claim 25

The combination of claim 10 wherein: information carried by the parallel information channels is at audio frequencies.