Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2004-07-29
2009-12-22
Phu, Phuong (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S150000, C375S148000, C375S147000, C375S143000, C375S142000, C370S342000, C370S320000, C370S335000, C370S441000
Reexamination Certificate
active
07636384
ABSTRACT:
The present invention discloses a method for detecting orthogonal code CDMA signal implemented mainly through the following steps: estimating the total power of interference to the multi-path signals; performing matched filtering on the multi-path signals and performing maximum ratio combining on the multi-path signals by utilizing the total power of interference to the multi-path signals, to obtain the optimized matched filtering result; and performing joint detection on the optimized matched filtering result. There are two schemes for implementing: if the optimized matched filtering detection scheme is used, only the first two main steps are executed; if the joint detection scheme is used, all of the three steps are executed. In either of above two schemes, the interference code channels involved in the estimation of total power of interference to the multi-path signals are need to be selected, i.e., all of the code channels in the serving cell or the code channels in the serving cell which are not performed joint detection on are selected. As the present invention takes full advantage of the characteristic of orthogonal code as well as the channel estimation result, system performance can be improved at a lower price. The present invention is especially suitable for terminal devices in an orthogonal code Code Division Multiple Access system.
REFERENCES:
patent: 6865218 (2005-03-01), Sourour
patent: 1355627 (2002-06-01), None
patent: 1 296 462 (2003-03-01), None
patent: 11-251965 (1999-09-01), None
Noneaker “Optimal Combining for Rake Reception in Mobile Cellular CDMA Forward Links” Military Communications Conference (1998) IEEE p. 842-846.
Varanasi “Parallel Group Detection for Synchronous CDMA Communication Over Frequency-Selective Rayleigh Fading Channels” IEEE Transactions on Information Theory vol. 42. No. 1 Jan. 1996 p. 116-128.
Sun Changguo
Wang Yingmin
Yang Guiliang
Da Tang Mobile Communications Equipment Co., Ltd.
Merchant & Gould P.C.
Phu Phuong
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