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Patent US5881056A successfully refreshed from Google Patents.
US5881056A
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Method and apparatus of a multi-code code division multiple access receiver having shared accumulator circuits
Assignee: Avago Technologies International Sales Pte Ltd
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Filing: 1996-08-20
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Granted: 1999-03-09
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Expires: 2016-08-20
Abstract
Abstract A Multi-Code (MC) Code Division Multiple Access (CDMA) receiver receives N (where N>1) encoded signal channels over multiple air signal paths. The MC-CDMA receiver receives and demodulates the N encoded signal channels into N signal samples and includes a common circuit for time-sharing an accumulator, for accumulating the N signal samples, among a plurality of second correlators. Each of the plurality of second correlator means utilizes the time-shared accumulator to accumulate samples from each of the N signals which are then decoded into an associated one of the N signal channels.
Inventors
- 👤 Howard C. Huang
- 👤 Chih-Lin I
- 👤 Andrzej Partyka
- 👤 Stephan ten Brink
- 👤 Charles Albert Webb, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:23
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/709; H04B1/7097; H04B1/711; H04B1/7115; H04J; H04J13/00; H04J13/0077; H04B2201/00; H04B2201/69; H04B2201/707; H04B2201/70707; H04B2201/70714
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
116 words
A multicode (MC) code division multiple access (CDMA) receiver comprising rake receiver means for receiving and demodulating a MC-CDMA signal including N (where N>1) encoded signal channels into N signal samples, a common logic circuit for time-sharing an accumulator, for accumulating the timing information of the N signal samples, among a plurality of correlator means, and each of the plurality of correlator means either utilizes the sample accumulation from each of the N signals from the time-shared accumulator for decoding an associated one of the N signal channels, or utilizes the sample accumulation from each of the N signals from the time-shared accumulator for tracking and acquiring timing information for a preselected channel of the MC-CDMA-signal.
Claim 2
Dependent Claim
116 words
A multicode (MC) code division multiple access (CDMA) receiver comprising rake receiver means for receiving and demodulating a MC-CDMA signal including N (where N>1) encoded signal channels into N signal samples, a common logic circuit for time-sharing an accumulator, for accumulating the timing information of the N signal samples, among a plurality of correlator means, and each of the plurality of correlator means either utilizes the sample accumulation from each of the N signals from the time-shared accumulator for decoding an associated one of the N signal channels, or utilizes the sample accumulation from each of the N signals from the time-shared accumulator for tracking and acquiring timing information for a preselected channel of the MC-CDMA-signal.
Claim 3
Dependent Claim
54 words
The multicode MC-CDMA receiver of claim 1 further including first correlator means for tracking and acquiring timing information for a preselected channel of the MC-CDMA signal, and wherein each of the second correlator means utilizes the acquired timing information from the first correlator means for decoding an associated one of the N signal channels.
Claim 4
Dependent Claim
26 words
The multicode MC-CDMA receiver of claim 2 further including a common logic circuit which is time-shared between the first correlator means and the second correlator means.
Claim 5
Dependent Claim
26 words
The multicode MC-CDMA receiver of claim 2 further including a separate common logic circuit for each of the first correlator means and the second correlator means.
Claim 6
Dependent Claim
18 words
The multicode MC-CDMA receiver of claim 2 wherein each of the second correlator means includes a FWHT decoder.
Claim 7
Dependent Claim
35 words
The multicode MC-CDMA receiver of claim 2 wherein the plurality of second correlator means share a FWHT implemented as part of a digital signal processor which processes output signals from the plurality of second correlators.
Claim 8
Dependent Claim
42 words
The multicode MC-CDMA receiver of claim 1 wherein the plurality of second correlator means further includes at least two correlators selected from a group of correlators comprising a pilot-on-time correlator, a pilot-early/late correlator, a plurality of data-on-time correlators, and a data-early/late correlator.
Claim 9
Dependent Claim
41 words
The multicode MC-CDMA receiver of claim 1 being coherent and wherein the plurality of correlators means further includes at least two correlators selected from a group of correlators comprising a pilot-on-time correlator, a pilot-early/late correlator, and a plurality of data-on-time correlators.
Claim 10
Dependent Claim
38 words
The multicode MC-CDMA receiver of claim 1 being non-coherent and wherein the plurality of correlator means further includes at least two correlators selected from a group of correlators comprising a plurality of data-on-time correlator, and a data-early/late correlator.
Claim 11
Dependent Claim
25 words
The multicode MC-CDMA receiver of claim 1 further including a multi-code Walsh generator shared among the N signal channels for generating the N signal samples.
Claim 12
Dependent Claim
25 words
The multicode MC-CDMA receiver of claim 1 further including a base-code Walsh generator shared among the N signal channels for generating the N signal samples.
Claim 13
Independent Claim
116 words
A method of operating a multicode (MC) code division multiple access (CDMA) receiver comprising the steps of: receiving and demodulating a MC-CDMA signal including N (where N>1) encoded signal channels into N signal samples, time-sharing an accumulator, for accumulating the timing information of the N signal samples, among a plurality of correlator means, and at each of the plurality of correlator means, utilizing the sample accumulation from each of the N signals from the accumulator time-sharing step for decoding an associated one of the N signal channels, or utilizing the sample accumulation from each of the N signals from the accumulator time-sharing step for tracking and acquiring timing information for a preselected channel of the MC-CDMA-signal.
Claim 14
Independent Claim
116 words
A method of operating a multicode (MC) code division multiple access (CDMA) receiver comprising the steps of: receiving and demodulating a MC-CDMA signal including N (where N>1) encoded signal channels into N signal samples, time-sharing an accumulator, for accumulating the timing information of the N signal samples, among a plurality of correlator means, and at each of the plurality of correlator means, utilizing the sample accumulation from each of the N signals from the accumulator time-sharing step for decoding an associated one of the N signal channels, or utilizing the sample accumulation from each of the N signals from the accumulator time-sharing step for tracking and acquiring timing information for a preselected channel of the MC-CDMA-signal.
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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) | 2002-03-08 | 2002-09-07 | 2003-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-08 | 2006-09-07 | 2007-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-08 | 2010-09-07 | 2011-03-09 | $7700.00 | Window Closed / Lapsed |