Time division duplex repeater for use in a CDMA system
First Claim
1. A method of amplifying a spread spectrum signal at a repeater site, said spread spectrum signal comprised of a series of code symbols, said method comprising the steps of:
- receiving during a first interval said spread spectrum signal;
amplifying said received spread spectrum signal;
delaying with a delay circuit said amplified received spread spectrum signal by a predetermined amount;
transmitting from an antenna during a second interval said delayed amplified received spread spectrum signal, said delay circuit and said antenna being electrically connected and located within said repeater site; and
wherein said step of receiving and said step of transmitting are mutually exclusive events.
1 Assignment
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Accused Products
Abstract
A method and apparatus for time division duplex (TDD) repeating a spread spectrum signal, where spread spectrum signal is comprised of a series of code symbol modulated with a pseudonoise (PN) sequence. The TDD repeater receives intermittently the spread spectrum signal at a location remote from a source supplying the spread spectrum signal. The TDD repeater amplifies and delays the received spread spectrum signal by a predetermined amount. The TDD repeater transmits intermittently the delayed amplified received spread spectrum signal such that the TDD is not receiving the spread spectrum signal when it is transmitting the signal energy.
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Citations
37 Claims
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1. A method of amplifying a spread spectrum signal at a repeater site, said spread spectrum signal comprised of a series of code symbols, said method comprising the steps of:
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receiving during a first interval said spread spectrum signal; amplifying said received spread spectrum signal; delaying with a delay circuit said amplified received spread spectrum signal by a predetermined amount; transmitting from an antenna during a second interval said delayed amplified received spread spectrum signal, said delay circuit and said antenna being electrically connected and located within said repeater site; and wherein said step of receiving and said step of transmitting are mutually exclusive events. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus for amplifying a spread spectrum signal comprising:
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means for receiving intermittently said spread spectrum signal; means for amplifying said received spread spectrum signal; means for delaying said amplified received spread spectrum signal by a predetermined amount; means for transmitting intermittently said delayed amplified received spread spectrum signal; wherein said means for receiving intermittently and said means for transmitting intermittently operate mutually exclusively such that said delayed amplified received spread spectrum signal is transmitted only or said spread spectrum signal is received only; wherein the apparatus for amplifying said spread spectrum signal further comprises; means for receiving intermittently a second spread spectrum signal; means for amplifying said second received spread spectrum signal; means for delaying said second amplified received spread spectrum signal by a second predetermined amount; means for transmitting intermittently said second delayed amplified received spread spectrum signal; wherein the apparatus for amplifying said spread spectrum signal further comprises; means for detecting a first gain of said intermittently transmitted spread spectrum signal; and means for adjusting a second gain in said step of amplifying said second received spread spectrum signal based on said first gain.
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21. A time division duplex repeater for amplifying a spread spectrum signal comprising:
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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. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method of amplifying a spread spectrum signal, said spread spectrum signal comprised of a series of code symbols, said method comprising the steps of:
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receiving during a first interval said spread spectrum signal; amplifying said received spread spectrum signal; delaying said amplified received spread spectrum signal by a predetermined amount; transmitting during a second interval said delayed amplified received spread spectrum signal; wherein said step of receiving and said step of transmitting are mutually exclusive events and wherein the method of amplifying said spread spectrum signal further comprises 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; transmitting during a fourth interval said second delayed amplified received spread spectrum signal; wherein the method of amplifying said spread spectrum signal further comprises the steps of; detecting a first gain of said transmitted spread spectrum signal; and adjusting a second gain in said step of amplifying said second received spread spectrum signal based on said first gain.
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35. A method of amplifying a spread spectrum signal, said spread spectrum signal comprised of a series of code symbols, said method comprising the steps of:
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receiving during a first interval said spread spectrum signal; amplifying said received spread spectrum signal; delaying said amplified received spread spectrum signal by a predetermined amount; transmitting during a second interval said delayed amplified received spread spectrum signal; wherein said step of receiving and said step of transmitting are mutually exclusive events and wherein the method of amplifying said spread spectrum signal further comprises 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; transmitting during a fourth interval said second delayed amplified received spread spectrum signal; wherein the method of amplifying a spread spectrum signal further comprises the steps of; transmitting a reverse link communication signal within said second spread spectrum signal; receiving and demodulating a forward link communication signal within said spread spectrum signal to determine a gain adjustment signal contained therein; and adjusting a gain in said step of amplifying said second received spread spectrum signal according to said gain adjustment signal.
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36. An apparatus for amplifying a spread spectrum signal comprising:
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means for receiving intermittently said spread spectrum signal; means for amplifying said received spread spectrum signal; means for delaying said amplified received spread spectrum signal by a predetermined amount; means for transmitting intermittently said delayed amplified received spread spectrum signal; wherein said means for receiving intermittently and said means for transmitting intermittently operate mutually exclusively such that said delayed amplified received spread spectrum signal is transmitted only or said spread spectrum signal is received only; wherein the apparatus for amplifying said spread spectrum signal further comprises; means for receiving intermittently a second spread spectrum signal; means for amplifying said second received spread spectrum signal; means for delaying said second amplified received spread spectrum signal by a second predetermined amount; means for transmitting intermittently said second delayed amplified received spread spectrum signal; wherein the apparatus for amplifying said spread spectrum signal further comprises; means for transmitting a reverse link communication signal within said second spread spectrum signal; means for receiving and demodulating a forward link communication signal within said spread spectrum signal to determine a gain adjustment signal contained therein; and means for adjusting a gain in said step of amplifying said second received spread spectrum signal according to said gain adjustment signal.
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37. A time division duplex repeater for amplifying a spread spectrum signal comprising:
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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.
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Specification