Path-diversity CDMA reception by detecting lower-peak correlation sequence following removal of higher-peak sequences

摘要

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.