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US5887038A
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US
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Adaptive antenna array processing arrangement using a combined coherent and constant-modulus reference signal
Assignee: Nokia of America Corp
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Filing: 1997-04-22
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Granted: 1999-03-23
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Expires: 2017-04-22
Abstract
Abstract An apparatus for performance improvement of a digital wireless receiver comprises a processing circuit for processing a plurality of received signals and providing a processed signal, wherein each of the plurality of received signals is weighted and combined to provide the processed signal; and a generation circuit for computing a composite reference signal for use in weight generation. The composite reference signal is computed as a weighted average of a coherent reference signal value and a constant-modulus reference signal value.
Inventors
- 👤 Glenn David Golden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:11
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/02; H04L1/06; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0837; H04B7/0842; H04B7/0848; H04B7/0851
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
100 words
An apparatus for performance improvement of a digital wireless receiver comprising: a processing circuit for processing a plurality of received signals and providing a processed signal, wherein a weight is applied to each of said plurality of received signals producing a plurality of weighted received signals and said plurality of weighted received signals are combined to provide said processed signal; and a generation circuit for computing a composite reference signal for use in weight generation; wherein said composite reference signal is continuously computed as a weighted average of a coherent reference signal value and a constant-modulus algorithm reference signal value.
Claim 2
Independent Claim
100 words
An apparatus for performance improvement of a digital wireless receiver comprising: a processing circuit for processing a plurality of received signals and providing a processed signal, wherein a weight is applied to each of said plurality of received signals producing a plurality of weighted received signals and said plurality of weighted received signals are combined to provide said processed signal; and a generation circuit for computing a composite reference signal for use in weight generation; wherein said composite reference signal is continuously computed as a weighted average of a coherent reference signal value and a constant-modulus algorithm reference signal value.
Claim 3
Dependent Claim
25 words
The apparatus as recited in claim 1 wherein during initial weight acquisition said composite reference signal is substantially equivalent to said coherent reference signal value.
Claim 4
Dependent Claim
25 words
The apparatus as recited in claim 1 wherein after initial weight acquisition said composite reference signal is substantially equivalent to said constant-modulus reference signal value.
Claim 5
Dependent Claim
18 words
The apparatus as recited in claim 1 wherein said plurality of received signals comprise TDMA mobile radio signals.
Claim 6
Dependent Claim
19 words
The apparatus as recited in claim 4 wherein said TDMA mobile radio signals comprise IS-136 based mobile radio signals.
Claim 7
Dependent Claim
19 words
The apparatus as recited in claim 4 wherein said TDMA mobile radio signals comprise IS-54 based mobile radio signals.
Claim 8
Dependent Claim
16 words
The apparatus as recited in claim 1 wherein said processing circuit comprises a digital signal processor.
Claim 9
Dependent Claim
16 words
The apparatus as recited in claim 1 wherein said generation circuit comprises a digital signal processor.
Claim 10
Independent Claim
62 words
A method for performance improvement of a digital wireless receiver comprising the steps of: processing a plurality of received signals; computing continuously a composite reference signal, for use in weight generation, as a weighted average of a coherent reference signal value and a constant-modulus algorithm reference signal value; and, weighting and combining each of said received signals to provide a processed signal.
Claim 11
Independent Claim
62 words
A method for performance improvement of a digital wireless receiver comprising the steps of: processing a plurality of received signals; computing continuously a composite reference signal, for use in weight generation, as a weighted average of a coherent reference signal value and a constant-modulus algorithm reference signal value; and, weighting and combining each of said received signals to provide a processed signal.
Claim 12
Dependent Claim
25 words
The method as recited in claim 9 wherein during initial weight acquisition said composite reference signal is substantially equivalent to said coherent reference signal value.
Claim 13
Dependent Claim
25 words
The method as recited in claim 9 wherein after initial weight acquisition said composite reference signal is substantially equivalent to said constant-modulus reference signal value.
Claim 14
Dependent Claim
18 words
The method as recited in claim 9 wherein said plurality of received signals comprise TDMA mobile radio signals.
Claim 15
Dependent Claim
19 words
The method as recited in claim 12 wherein said TDMA mobile radio signals comprise IS-136 based mobile radio signals.
Claim 16
Dependent Claim
19 words
The method is recited in claim 12 wherein said TDMA mobile radio signals comprise IS-54 based mobile radio signals.
Claim 17
Dependent Claim
22 words
The method as recited in claim 9 wherein the step of processing a plurality of received signals utilizes a digital signal processor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-22 | 2002-09-21 | 2003-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-22 | 2006-09-21 | 2007-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-22 | 2010-09-21 | 2011-03-23 | $7700.00 | Window Closed / Lapsed |