Path-diversity CDMA reception by detecting lower-peak correlatio

Details Path-diversity CDMA reception by detecting lower-peak correlatio Path-diversity CDMA reception by detecting lower-peak correlatio

1997-06-23

1998-08-18

Ghebretinsae, Temesghen

Pulse or digital communications

Repeaters

Testing

375205, 375347, 370342, H04K 100, H04B 1707

Patent

active

057967750

ABSTRACT:
In a DS-CDMA receiver, successively time shifted replicas of a despreading sequence are used to detect correlations with a received chip sequence and resulting correlation sequences are stored in a memory. A correlation sequence having a maximum peak and correlation sequences having side peaks inherently associated with the maximum peak are detected in the memory and all of the detected correlation sequences are removed from the memory. Following this removal, a correlation sequence having a maximum peak is detected from the remaining correlation sequences and the timing of the correlation sequence is determined. A despreading sequence which is delayed in accordance with the determined timing is produced and the chip sequence is despread with the delayed despreading sequence to produce a diversity branch signal.

REFERENCES:
patent: 5598428 (1997-01-01), Sato
patent: 5648983 (1997-07-01), Kostic et al.

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