US4584583A
Expired / Lapsed
US
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LMS adaptive loop module
Assignee: BAE Systems Aerospace Inc
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Filing: 1983-06-30
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Granted: 1986-04-22
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Expires: 2003-06-30
Abstract
Abstract An LMS adaptive control loop module for reducing the effects of received interference includes a single antenna coupled to a first hybrid for generating a reference channel and an auxiliary channel. The auxiliary channel provides I/Q signals from a second hybrid and I/Q drive signals from I/Q correlation multipliers which are used to weight the I/Q signals from said second hybrid. The weighted signals and the reference channel signals are combined and provide an output.
Inventors
- 👤 Paul S. Dennis, Jr.
- 👤 Anthony M. Kowalski
- 👤 Michael Weiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:26
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/12; H04B1/123
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
258 words
A module for cancelling undesired signals received with a desired signal by a single antenna and having an output port for providing an output signal, said module for use in combination with other similar modules, said module comprising: (a) First means for providing the desired signal and any undesired signal received by the single antenna with the desired signal; (b) A first hybrid having an input port coupled to said first means and having a reference output port and an auxiliary output port; (c) A second hybrid having an input port coupled to the auxiliary output port and providing an in-phase output signal and a quadrature output signal; (d) An in-phase correlator multiplier having a first input port coupled to the auxiliary output port and a feedback input port coupled to the apparatus output port, said in-phase correlator multiplier providing an output signal; (e) A quadrature correlator multiplier having a first input port coupled to the auxiliary output port and a feedback input port coupled to the apparatus output port, said quadrature correlator multiplier providing an output signal; (f) Means for providing an in-phase drive signal and a quadrature drive signal corresponding to the output signals of the in-phase and quadrature correlator multipliers, respectively; (g) Means for weighting the in-phase and quadrature output signals provided by the second hybrid in response to the in-phase and quadrature drive signals, respectively; and (h) Means for summing the weighted in-phase and quadrature output signals and signals provided at the reference output port, said means for summing having the apparatus output port.
Claim 2
Dependent Claim
258 words
A module for cancelling undesired signals received with a desired signal by a single antenna and having an output port for providing an output signal, said module for use in combination with other similar modules, said module comprising: (a) First means for providing the desired signal and any undesired signal received by the single antenna with the desired signal; (b) A first hybrid having an input port coupled to said first means and having a reference output port and an auxiliary output port; (c) A second hybrid having an input port coupled to the auxiliary output port and providing an in-phase output signal and a quadrature output signal; (d) An in-phase correlator multiplier having a first input port coupled to the auxiliary output port and a feedback input port coupled to the apparatus output port, said in-phase correlator multiplier providing an output signal; (e) A quadrature correlator multiplier having a first input port coupled to the auxiliary output port and a feedback input port coupled to the apparatus output port, said quadrature correlator multiplier providing an output signal; (f) Means for providing an in-phase drive signal and a quadrature drive signal corresponding to the output signals of the in-phase and quadrature correlator multipliers, respectively; (g) Means for weighting the in-phase and quadrature output signals provided by the second hybrid in response to the in-phase and quadrature drive signals, respectively; and (h) Means for summing the weighted in-phase and quadrature output signals and signals provided at the reference output port, said means for summing having the apparatus output port.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 wherein said means for providing in-phase and quadrature drive signals comprises an in-phase baseband processor and a quadrature baseband processor.
Claim 4
Dependent Claim
15 words
The apparatus of claim 2 wherein said baseband processors comprise a single monolithic NMOS device.
Claim 5
Dependent Claim
87 words
The apparatus of claim 3 wherein said in-phase and quadrature correlator multipliers comprise: (a) a third hybrid having an input port coupled to the auxiliary output port and providing in-phase and quadrature output signals; (b) means for mixing the apparatus output signal and the in-phase output signal of the third hybrid and for providing the in-phase correlator multiplier output signal; and (c) Means for mixing the apparatus output signal and the quadrature output signal of the third hybrid and for providing the quadrature correlator multiplier output signal.
References Cited (Backward Citations)
US4280128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |