Time division duplex repeater for use in a CDMA system

Claim 3

The method of amplifying a spread spectrum signal of claim 1 wherein each symbol of said series of code symbols is one symbol duration in length and wherein said predetermined amount of delay is smaller than said symbol duration.

Claim 4

The method of amplifying a spread spectrum signal of claim 1 wherein said steps of receiving and transmitting are periodic with a period equal to approximately twice said predetermined amount of delay.

Claim 5

The method of amplifying a spread spectrum signal of claim 1 wherein said step of delaying is accomplished using a standing acoustic wave (SAW) filter.

Claim 6

The method of amplifying a spread spectrum signal of claim 1 wherein said steps of receiving, amplifying, delaying, and transmitting are performed at a first location remote from a source supplying said spread spectrum signal, further comprising the steps of: receiving during a third interval at a second location said transmitted spread spectrum signal; amplifying at said second location said received spread spectrum signal; delaying at said second location said amplified received spread spectrum signal by a second predetermined amount; and transmitting at said second location during a fourth interval said delayed amplified received spread spectrum signal; wherein said step of receiving and said step of transmitting at said second location are mutually exclusive events.

Claim 7

The method of amplifying a spread spectrum signal of claim 5 wherein said steps of receiving and transmitting at said second location are periodic with a period equal to approximately twice said second predetermined amount of delay and wherein said second predetermined amount of delay is at least twice as long as said predetermined amount of delay.

Claim 8

The method of amplifying a spread spectrum signal of claim 5 wherein said steps of receiving and transmitting at said second location are periodic with a period equal to approximately twice said second predetermined amount of delay and wherein said second predetermined amount of delay is less than half as long as said predetermined amount of delay.

Claim 9

The method of amplifying a spread spectrum signal of claim 5 wherein said step of delaying at said second location is performed by passing said amplified received spread spectrum signal through a standing acoustic wave (SAW) filter tuned to a center frequency of said spread spectrum signal.

Claim 10

The method of amplifying a spread spectrum signal of claim 1 further comprising the steps of: receiving during a third interval a second spread spectrum signal; amplifying said second received spread spectrum signal; delaying said second amplified received spread spectrum signal by a second predetermined amount; and transmitting during a fourth interval said second delayed amplified received spread spectrum signal.

Claim 11

The method of amplifying a spread spectrum signal of claim 9 wherein said first interval and said third interval overlap in time.

Claim 12

The method of amplifying a spread spectrum signal of claim 9 wherein said first interval and said third interval correspond to the same time interval.

Claim 13

The method of amplifying a spread spectrum signal of claim 9 wherein said first interval and said fourth interval overlap in time.

Claim 14

The method of amplifying a spread spectrum signal of claim 9 wherein said first interval and said fourth interval correspond to the same time interval.

Claim 15

The method of amplifying a spread spectrum signal of claim 9 wherein said second predetermined amount is the same as said predetermined amount.

Claim 16

The method of amplifying a spread spectrum signal of claim 9 wherein said second predetermined amount is different from said predetermined amount.

Claim 17

The method of amplifying a spread spectrum signal of claim 1 wherein said series of code symbols is modulated with a pseudonoise (PN) sequence.

Claim 18

The method of amplifying a spread spectrum signal of claim 1 wherein said series of code symbols is frequency hopped over time.

Claim 19

The method of amplifying a spread spectrum signal of claim 1 wherein said step of delaying further comprising the steps of: converting said amplified received spread spectrum signal to a digital signal; delaying said converted digital signal using a digital storage device; and converting said delayed converted digital signal into an analog signal.

Claim 20

The method of amplifying a spread spectrum signal of claim 18 wherein said predetermined amount varies over time.

Claim 23

A time division duplex repeater for amplifying a spread spectrum signal comprising: a first antenna receiving a forward link signal; an amplifier coupled to said first antenna; a delay device coupled in series with said first antenna and said amplifier; a second antenna coupled in series with said first antenna, said amplifier and said delay device for providing a repeated forward link signal; and an isolation device coupled in series with said amplifier, said first and second antennas, and said delay device for intermittently breaking a connection of said forward link signal to said delay device while said repeated forward link signal is provided by said second antenna.

Claim 24

A time division duplex repeater for amplifying a spread spectrum signal comprising: a first antenna receiving a forward link signal; an amplifier coupled to said first antenna; a delay device coupled in series with said first antenna and said amplifier; a second antenna coupled in series with said first antenna, said amplifier and said delay device for providing a repeated forward link signal; and an isolation device coupled in series with said amplifier, said first and second antennas, and said delay device for intermittently breaking a connection of said forward link signal to said delay device while said repeated forward link signal is provided by said second antenna.

Claim 25

The time division duplex repeater for amplifying a spread spectrum signal of claim 21 wherein said first and second antennas are the same physical structure.

Claim 26

The time division duplex repeater for amplifying a spread spectrum signal of claim 21 wherein said first antenna is a directional antenna directed at a source of said forward link signal.

Claim 27

The time division duplex repeater for amplifying a spread spectrum signal of claim 21 wherein said first antenna and said second antenna are located some distance apart.

Claim 28

The time division duplex repeater for amplifying a spread spectrum signal of claim 21 wherein said delay device is a standing acoustic wave (SAW) filter.

Claim 29

The time division duplex repeater for amplifying a spread spectrum signal of claim 21 wherein said delay device comprises: an analog to digital converter; a digital storage device coupled to an output of said analog to digital converter; and a digital to analog converter coupled to an output of said digital storage device.

Claim 30

The time division duplex repeater for amplifying a spread spectrum signal of claim 21 further comprising: a third antenna receiving a reverse link signal; a reverse link amplifier coupled to said third antenna; a reverse link delay device coupled in series with said third antenna and said reverse link amplifier; a fourth antenna coupled in series with said third antenna, said reverse link amplifier and said reverse link delay device for providing a repeated reverse link signal; and a reverse link isolation device coupled in series with said reverse link amplifier, said third and fourth antennas, and said reverse link delay device for intermittently disrupting a connection of said reverse link signal to said reverse link delay device while said repeated reverse link signal is provided by said fourth antenna.

Claim 31

The time division duplex repeater for amplifying a spread spectrum signal of claim 27 wherein said first, second, third and fourth antennas are the same physical structure.

Claim 32

The time division duplex repeater for amplifying a spread spectrum signal of claim 27 wherein said third and fourth antennas are the same physical structure.

Claim 33

The time division duplex repeater for amplifying a spread spectrum signal of claim 27 wherein said first and third antennas are the same physical structure.

Claim 34

The time division duplex repeater for amplifying a spread spectrum signal of claim 27 wherein said first and third antennas are a single directional antenna.

Claim 35

The time division duplex repeater for amplifying a spread spectrum signal of claim 21 wherein said spread spectrum signal is modulated with a pseudonoise (PN) sequence.

Claim 36

The time division duplex repeater for amplifying a spread spectrum signal of claim 21 wherein said spread spectrum signal is frequency hopped over time.

Claim 43

A time division duplex repeater for amplifying a spread spectrum signal comprising: a first antenna receiving a forward link signal; an amplifier coupled to said first antenna; a delay device coupled in series with said first antenna and said amplifier; a second antenna coupled in series with said first antenna, said amplifier, and said delay device for providing a repeated forward link signal; an isolation device coupled in series with said amplifier, said first and second antennas, and said delay device for intermittently disrupting a connection of said forward link signal to said delay device while said repeated forward link signal is provided by said second antenna; wherein the time division duplex repeater for amplifying said spread spectrum signal further comprises: a third antenna receiving a reverse link signal; a reverse link amplifier coupled to said third antenna; a reverse link delay device coupled in series with said third antenna and said reverse link amplifier; a fourth antenna coupled in series with said third antenna, said reverse link amplifier and said reverse link delay device for providing a repeated reverse link signal; a reverse link isolation device coupled in series with said reverse link amplifier, said third and fourth antennas, and said reverse link delay device for intermittently disrupting a connection of said reverse link signal to said reverse link delay device while said repeated reverse link signal is provided by said fourth antenna; wherein the time division duplex repeater for amplifying said spread spectrum signal further comprises: a variable gain amplifier in series with said reverse link isolation device, said reverse link amplifier, said third and fourth antennas, and said reverse link delay device and receiving a gain control signal; and a mobile unit providing a first communication signal within said reverse link signal and receiving a second communication signal from within said repeated forward link signal, and providing said gain control signal.

Claim 44

A time division duplex repeater for amplifying a spread spectrum signal comprising: a first antenna receiving a forward link signal; an amplifier coupled to said first antenna; a delay device coupled in series with said first antenna and said amplifier; a second antenna coupled in series with said first antenna, said amplifier, and said delay device for providing a repeated forward link signal; an isolation device coupled in series with said amplifier, said first and second antennas, and said delay device for intermittently disrupting a connection of said forward link signal to said delay device while said repeated forward link signal is provided by said second antenna; wherein the time division duplex repeater for amplifying said spread spectrum signal further comprises: a third antenna receiving a reverse link signal; a reverse link amplifier coupled to said third antenna; a reverse link delay device coupled in series with said third antenna and said reverse link amplifier; a fourth antenna coupled in series with said third antenna, said reverse link amplifier and said reverse link delay device for providing a repeated reverse link signal; a reverse link isolation device coupled in series with said reverse link amplifier, said third and fourth antennas, and said reverse link delay device for intermittently disrupting a connection of said reverse link signal to said reverse link delay device while said repeated reverse link signal is provided by said fourth antenna; wherein the time division duplex repeater for amplifying said spread spectrum signal further comprises: a variable gain amplifier in series with said reverse link isolation device, said reverse link amplifier, said third and fourth antennas, and said reverse link delay device and receiving a gain control signal; and a mobile unit providing a first communication signal within said reverse link signal and receiving a second communication signal from within said repeated forward link signal, and providing said gain control signal.