Patent US6990137B2 successfully refreshed from Google Patents.
US6990137B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method for received signal prediction in wireless communications systems
Assignee: Qualcomm Inc
•
Filing: 2001-05-17
•
Granted: 2006-01-24
•
Expires: 2021-05-17
Abstract
Abstract Method and apparatus to compute the combiner coefficients for wireless communication systems for a space-time solution. One embodiment trains the weights on a signal known a priori that is time multiplexed with other signals, such as a pilot signal in a High Data Rate, HDR, system, wherein the signal is transmitted at full power. A Minimizing Mean Square Error, MMSE, approach is applied allowing weight combining on a per path basis. The weights are calculated as a function of a noise correlation matrix and spatial signature per path. The noise correlation matrix is determined from an autocorrelation matrix of the received signal. In one embodiment, the MMSE approach is applied to a non-time gated pilot signal.
Inventors
- 👤 John Edward Smee
- 👤 Nagabhushana Sindhushayana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:29
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0837; H04B7/0842; H04B7/0848; H04B1/00; H04B1/69; H04B1/707; H04B1/7097; H04B1/7103; H04B1/7105; H04B1/71055; H04B7/0851; H04B7/0854; H04B7/0857; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
142 words
A remote station apparatus comprising: a first rake receiver having a plurality of fingers; a second rake receiver having a plurality of fingers; and a first path processing unit coupled to one of the plurality of fingers of the first rake receiver and one of the plurality of fingers of the second rake receiver, wherein the first path processing unit further comprises: a correlation unit coupled to the first and second rake receivers, operative to determine a noise correlation of received signals as a function of the received signals autocorrelation; a signature generator coupled to the first and second rake receivers, operative to generate a signature associated with the first path; and a weighting unit coupled to the correlation unit and the signature generator, operative to determine a combiner weight for the first path based on the noise correlation and the signature.
Claim 2
Dependent Claim
142 words
A remote station apparatus comprising: a first rake receiver having a plurality of fingers; a second rake receiver having a plurality of fingers; and a first path processing unit coupled to one of the plurality of fingers of the first rake receiver and one of the plurality of fingers of the second rake receiver, wherein the first path processing unit further comprises: a correlation unit coupled to the first and second rake receivers, operative to determine a noise correlation of received signals as a function of the received signals autocorrelation; a signature generator coupled to the first and second rake receivers, operative to generate a signature associated with the first path; and a weighting unit coupled to the correlation unit and the signature generator, operative to determine a combiner weight for the first path based on the noise correlation and the signature.
Claim 3
Dependent Claim
67 words
The remote station apparatus of claim 1 , wherein the first path processing unit further comprises: a summation node coupled to the weighting unit and the first and second rake receivers, operative to apply the combiner weight for the first path to the one of the plurality of fingers of the first rake receiver and the one of the plurality of fingers of the second rake receiver.
Claim 4
Dependent Claim
40 words
The remote station apparatus of claim 2 , wherein the first path processing unit further comprises: a path quality metric generator coupled to the signature generator and the weighting unit, operative to determine a quality measurement of the first path.
Claim 5
Dependent Claim
18 words
The remote station apparatus of claim 3 , wherein the quality measurement is a signal to noise ratio.
Claim 6
Independent Claim
92 words
A method in a communication system including first and second rake receivers, each having a plurality of fingers, and a first path processing unit coupled to one of the plurality of fingers of the first rake receiver and one of the plurality of fingers of the second rake receiver, the method comprising: determining a noise correlation of received signals as a function of the received signals autocorrelation; generating a signature associated with the first path; and determining a combiner weight for the first path based on the noise correlation and the signature.
Claim 7
Independent Claim
92 words
A method in a communication system including first and second rake receivers, each having a plurality of fingers, and a first path processing unit coupled to one of the plurality of fingers of the first rake receiver and one of the plurality of fingers of the second rake receiver, the method comprising: determining a noise correlation of received signals as a function of the received signals autocorrelation; generating a signature associated with the first path; and determining a combiner weight for the first path based on the noise correlation and the signature.
Claim 8
Dependent Claim
42 words
The method of claim 5 , further comprising: applying the combiner weight for the first path to the one of the plurality of fingers of the first rake receiver and the one of the plurality of fingers of the second rake receiver.
Claim 9
Dependent Claim
16 words
The method of claim 5 , further comprising: determining a quality measurement of the first path.
Claim 10
Dependent Claim
16 words
The method of claim 5 , further comprising: determining a signal-to-noise ratio of the first path.
Claim 11
Independent Claim
98 words
An apparatus in a communication system including first and second rake receivers, each having a plurality of fingers, and a first path processing unit coupled to one of the plurality of fingers of the first rake receiver and one of the plurality of fingers of the second rake receiver, the apparatus comprising: means for determining a noise correlation of received signals as a function of the received signals autocorrelation; means for generating a signature associated with the first path; and means for determining a combiner weight for the first path based on the noise correlation and the signature.
Claim 12
Independent Claim
98 words
An apparatus in a communication system including first and second rake receivers, each having a plurality of fingers, and a first path processing unit coupled to one of the plurality of fingers of the first rake receiver and one of the plurality of fingers of the second rake receiver, the apparatus comprising: means for determining a noise correlation of received signals as a function of the received signals autocorrelation; means for generating a signature associated with the first path; and means for determining a combiner weight for the first path based on the noise correlation and the signature.
Claim 13
Dependent Claim
44 words
The apparatus of claim 9 , further comprising: means for applying the combiner weight for the first path to the one of the plurality of fingers of the first rake receiver and the one of the plurality of fingers of the second rake receiver.
Claim 14
Dependent Claim
18 words
The apparatus of claim 9 , further comprising: means for determining a quality measurement of the first path.
Claim 15
Dependent Claim
18 words
The apparatus of claim 9 , further comprising: means for determining a signal-to-noise ratio of the first path.
References Cited (Backward Citations)
EP0631399A1
Cited
EP0806844A1
Cited
US5838742A
Cited
EP0892504A2
Cited
US5999560A
Cited
US6215814B1
Cited
US6529545B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-01-23 | 2009-07-25 | 2010-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-01-23 | 2013-07-25 | 2014-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-01-23 | 2017-07-25 | 2018-01-24 | $7700.00 | Window Closed / Lapsed |