Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2011-04-26
2011-04-26
Fan, Chieh M (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S267000, C375S147000
Reexamination Certificate
active
07933314
ABSTRACT:
According to a method taught herein, a multi-branch communication receiver operates in a first mode wherein it despreads individual receiver branch signals with respect to all channelization codes of interest, if sufficient despreader resources are available for such operation. If the receiver estimates that sufficient despreader resources are not available, it operates in a second mode wherein it despreads one or more of the channelization codes from a branch combination signal formed from two or more of the receiver branch signals. The receiver may calculate optimal branch combining weights using an algorithm that maximizes a signal quality of the branch combination signal. A Generalized RAKE (GRAKE) receiver embodiment applies GRAKE detection to the individual receiver branch signals with respect to all channelization codes of interest if sufficient despreader resources are available and, if not, applies GRAKE detection to the branch combination signal for one or more such codes.
REFERENCES:
patent: 6347234 (2002-02-01), Scherzer
patent: 7142586 (2006-11-01), Reial
patent: 2002/0181628 (2002-12-01), Iochi et al.
patent: 2002/0196871 (2002-12-01), Nishio et al.
patent: 2004/0219959 (2004-11-01), Khayrallah et al.
patent: 2004/0223539 (2004-11-01), Yang
patent: 2005/0163199 (2005-07-01), Wang
patent: 2005/0195889 (2005-09-01), Grant et al.
patent: 2005/0201447 (2005-09-01), Cairns et al.
patent: 2006/0056496 (2006-03-01), Smee et al.
patent: 2006/0083292 (2006-04-01), Khayrallah et al.
patent: 2006/0120439 (2006-06-01), Smee et al.
patent: 2006/0126705 (2006-06-01), Bachl et al.
patent: WO 2004/084431 (2004-09-01), None
Cairns, D., Fulghum, T. and Bexten, R., “Experimental Evaluation of Interference Cancellation for Dual-Antenna UMTS Handset.” Proceedings of IEEE 62ndVehicular Technology Conference (VTC-2005-Fall), Sep. 25-28, 2005, pp. 877-881 vol. 2, ISSN: 1090-3038, ISBN: 0-7803-9152-7.
Eltawil, A. M., et. al., “Dual Antenna UMTS Mobile Station Transceiver ASIC for 2Mb/s Data Rate.” Digest of Technical Papers IEEE International Solid-State Circuits Conference (ISSCC, 2003) Session 8 Communications Signal Paper 8.3, Feb. 2003, 10 pages, vol. 1, ISSN: 0193-6530, ISBN: 0-7803-7707-9, Innovics Wireless, Los Angeles, CA, USA.
Fabbryccio, A.C.M. et. al. “Performance of an Adaptive Space-Time Processing Receiver for the User Terminal of 3G WCDMA Systems under COST-259 Channel Models.” Proceeding of IEEE 56thVehicular Technology Conference (VTC 2002-Fall, Sep. 24-28, 2002, pp. 57-61, vol. 1, ISSN: 1090-3038, ISBN: 0-7803-7467-3.
Harju, et al., “A Flexible Rake Receiver Architecture for WCDMA Mobile Terminals,” Third IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, Mar. 20-23, 2001, pp. 9-12, Taoyuan, Taiwan, XP10542258A.
Coats & Bennett P.L.L.C.
Fan Chieh M
Garcia Santiago
Telefonaktiebolaget LM Ericsson (publ)
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