US5812947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular/satellite communications systems with improved frequency re-use
Assignee: Ericsson Inc
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Filing: 1996-12-02
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Granted: 1998-09-22
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Expires: 2016-12-02
Abstract
Abstract A radio communication system and method for minimizing co-channel interference comprises a technique for communicating between first stations and second stations. The technique involves: i) processing, at a first station, first signals into a form representative of modulated radio signals; ii) combining the representations to form a number of transmit signals using a set of combining parameters; iii) transmitting the transmit signals using a transmitter and antenna for each of the signals; iv) receiving the transmit signals at the second stations to produce received signals; v) measuring at the second stations an amount received of at least one unwanted signal relative to the amount of wanted signal received to produce measurement results; vi) transmitting the measurement results from the second stations to the first station; and vii) receiving the measurement results at the first station and using the results to modify the combining parameters such that unwanted signals received at the second stations are reduced and wanted signals enhanced. The measuring step includes the step of correlating received signals with known signals to produce the amount of at least one unwanted signal, and the amount of wanted signal.
Inventors
- 👤 Paul W. Dent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:55
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/02; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/246; H01Q1/27; H01Q1/28; H01Q1/288; H01Q21/00; H01Q21/06; H01Q21/08; H01Q21/28; H01Q25/00; H01Q25/007; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0837; H04B7/0842; H04B7/0848; H04B7/0851; H04B7/10; H04B7/14; H04B7/15; H04B7/185; H04B7/1851; H04B7/18513; H04B7/18515; H04B7/1853; H04B7/18532; H04B7/18567; H04B7/204; H04B7/2041; H04L; H04L25/00; H04L25/02; H04L25/0202; H04L25/0204; H04L25/021; H04L25/03; H04L25/03006; H04L25/03178; H04L25/03331; H04W84/00; H04W84/02; H04W84/022; H04W84/025; H04B7/2046; H04L1/00; H04L1/004; H04L1/0056; H04L1/007; H04L25/03203; H04L25/03248; H04L25/0328; H04L25/03299; H04W16/14; H04W74/00; H04W74/08; H04W84/04; H04W84/042; H04W84/06
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
195 words
A method for communicating a plurality of first signals from a first station to a corresponding plurality of second stations and a plurality of second signals from said second stations to said first station involving the steps of: processing said first signals into a form representative of modulated radio signals; combining said representations to form a number of transmit signals using a set of combining parameters; transmitting said transmit signals using a transmitter and antenna for each of said signals; receiving said transmit signals at said second stations to produce received signals; measuring at said second stations an amount received of at least one unwanted signal relative to the amount of wanted signal received to produce measurement results; transmitting said measurement results from said second stations to said first station; receiving said measurement results at said first station and using said results to modify said combining parameters such that unwanted signals received at said second stations are reduced and wanted signals enhanced; wherein said step of measuring further includes the step of correlating said received signals with known signals to produce said amount of at least one unwanted signal, and said amount of wanted signal.
Claim 2
Independent Claim
195 words
A method for communicating a plurality of first signals from a first station to a corresponding plurality of second stations and a plurality of second signals from said second stations to said first station involving the steps of: processing said first signals into a form representative of modulated radio signals; combining said representations to form a number of transmit signals using a set of combining parameters; transmitting said transmit signals using a transmitter and antenna for each of said signals; receiving said transmit signals at said second stations to produce received signals; measuring at said second stations an amount received of at least one unwanted signal relative to the amount of wanted signal received to produce measurement results; transmitting said measurement results from said second stations to said first station; receiving said measurement results at said first station and using said results to modify said combining parameters such that unwanted signals received at said second stations are reduced and wanted signals enhanced; wherein said step of measuring further includes the step of correlating said received signals with known signals to produce said amount of at least one unwanted signal, and said amount of wanted signal.
Claim 3
Dependent Claim
22 words
A method according to claim 1 in which said first station comprises a ground station communicating with at least one orbiting satellite.
Claim 4
Dependent Claim
29 words
A method according to claim 2 in which said corresponding transmitters form part of a satellite transponder for relaying said transmit signals from said ground station via said satellite.
Claim 5
Dependent Claim
29 words
A method according to claim 3 in which said transmit signals are relayed by a coherent transponder in such a way as to preserve their relative phases and amplitudes.
Claim 6
Dependent Claim
29 words
A method according to claim 1, wherein said measuring step includes forming a ratio of said amount of at least one unwanted signal to said amount of wanted signal.
Claim 7
Dependent Claim
13 words
A method according to claim 5, wherein said ratio forms a complex value.
Claim 8
Dependent Claim
28 words
A method according to claim 1 in which said step of correlating said received signals with known signals comprises correlating said received signals with a set of codes.
Claim 9
Dependent Claim
47 words
A method according to claim 7, wherein said amount of wanted signal is produced by correlating said received signals with at least a first code, and said amount of at least one unwanted signal is produced by correlating said received signals with at least a second code.
Claim 10
Dependent Claim
24 words
A method according to claim 1, wherein said step of transmitting comprises transmitting only largest ones of said measurement results to said first station.
Claim 11
Dependent Claim
30 words
A method according to claim 1, wherein said step of receiving at the first station modifies said combining parameters such that wanted signals received at said second stations are maximized.
Claim 12
Independent Claim
172 words
A method for communicating a plurality of first signals from a first station to a corresponding plurality of second stations and a plurality of second signals from said second stations to said first station involving the steps of: processing said first signals into a form representative of modulated radio signals; combining said representations to form a number of transmit signals using a set of combining parameters; amplifying said transmit signals to desired transmit power levels and transmitting said transmit signals using a corresponding transmitter and antenna for each transmit signal; measuring at said second stations an amount received of at least one unwanted signal relative to the amount of wanted signal received to produce measurement results; transmitting said measurement results from said second stations to said first station; receiving said measurement results at said first station and using said results to modify said combining parameters such that unwanted signals received at said second stations are reduced and the sum of said transmit power levels needed to transmit said first signals is reduced.
Claim 13
Independent Claim
172 words
A method for communicating a plurality of first signals from a first station to a corresponding plurality of second stations and a plurality of second signals from said second stations to said first station involving the steps of: processing said first signals into a form representative of modulated radio signals; combining said representations to form a number of transmit signals using a set of combining parameters; amplifying said transmit signals to desired transmit power levels and transmitting said transmit signals using a corresponding transmitter and antenna for each transmit signal; measuring at said second stations an amount received of at least one unwanted signal relative to the amount of wanted signal received to produce measurement results; transmitting said measurement results from said second stations to said first station; receiving said measurement results at said first station and using said results to modify said combining parameters such that unwanted signals received at said second stations are reduced and the sum of said transmit power levels needed to transmit said first signals is reduced.
Claim 14
Dependent Claim
22 words
A method according to claim 11 in which said first station comprises a ground station communicating with at least one orbiting satellite.
Claim 15
Dependent Claim
29 words
A method according to claim 12 in which said corresponding transmitters form part of a satellite transponder for relaying said transmit signals from said ground station via said satellite.
Claim 16
Dependent Claim
29 words
A method according to claim 13 in which said transmit signals are relayed by a coherent transponder in such a way as to preserve their relative phases and amplitudes.
Claim 17
Dependent Claim
25 words
A method of claim 11, wherein said step of receiving said measurement results further reduces said sum of said transmit power levels to a minimum.
Claim 18
Independent Claim
201 words
A system for wireless communication between at least one first station and at least one second station, comprising: a first station including a processor for processing first signals into a form representative of modulated radio signals; a first station combiner for combining said representations to form a number of transmit signals using a set of combining parameters; a first station transmitter for transmitting said transmit signals; a second station receiver for receiving said transmitted signals to produce received signals; second station logic for determining an amount received by said receiver of at least one unwanted signal relative to the amount of wanted signal received by said receiver to produce measurement results; a second station transmitter for transmitting said measurement results from said second station to said first station; a first station receiver for receiving said measurement results from said second station transmitter; wherein said first station uses said results to modify said combining parameters such that unwanted signals received at said second stations are reduced and wanted signals enhanced; wherein said logic for determining further includes logic for correlating said received signals with known signals to produce said amount of at least one unwanted signal, and said amount of wanted signal.
Claim 19
Independent Claim
201 words
A system for wireless communication between at least one first station and at least one second station, comprising: a first station including a processor for processing first signals into a form representative of modulated radio signals; a first station combiner for combining said representations to form a number of transmit signals using a set of combining parameters; a first station transmitter for transmitting said transmit signals; a second station receiver for receiving said transmitted signals to produce received signals; second station logic for determining an amount received by said receiver of at least one unwanted signal relative to the amount of wanted signal received by said receiver to produce measurement results; a second station transmitter for transmitting said measurement results from said second station to said first station; a first station receiver for receiving said measurement results from said second station transmitter; wherein said first station uses said results to modify said combining parameters such that unwanted signals received at said second stations are reduced and wanted signals enhanced; wherein said logic for determining further includes logic for correlating said received signals with known signals to produce said amount of at least one unwanted signal, and said amount of wanted signal.
Claim 20
Dependent Claim
30 words
A system according to claim 16, wherein said logic for determining includes forming a ratio of said amount of at least one unwanted signal to said amount of wanted signal.
Claim 21
Dependent Claim
13 words
A system according to claim 17, wherein said ratio forms a complex value.
Claim 22
Dependent Claim
30 words
A system according to claim 16 in which said logic for correlating said received signals with known signals comprises logic for correlating said received signals with a set of codes.
Claim 23
Dependent Claim
47 words
A system according to claim 19, wherein said amount of wanted signal is produced by correlating said received signals with at least a first code, and said amount of at least one unwanted signal is produced by correlating said received signals with at least a second code.
Claim 24
Dependent Claim
23 words
A system according to claim 16, wherein said second station transmitter transmits only largest ones of said measurement results to said first station.
Claim 25
Dependent Claim
25 words
A system according to claim 16, wherein said first station modifies said combining parameters such that wanted signals received at said second station are maximized.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-21 | 2002-03-23 | 2002-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-21 | 2006-03-23 | 2006-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-21 | 2010-03-23 | 2010-09-22 | $7700.00 | Window Closed / Lapsed |