Receiving apparatus for use in CDMA type mobile radio communication system comprising a plurality of path receivers each including a follow-up path detection unit

摘要

In a direct sequence/code division multiple access (DS/CDMA) type interference canceller receiving apparatus having a delaying unit for delaying a reception signal into zeroth through (N-1)-th delayed signals, zeroth through (N-1)-th path receivers for demodulating the zeroth thorough the (N-1)-th delayed signals into zeroth through (N-1)-th demodulated signals, and a combining unit for combining the zeroth through the (N-1)-th demodulated signals into a combined signal, an n-th path receivers includes an n-th follow-up path detection unit for detecting an n-th follow-up path for the n-th path receiver on the basis of a peculiar spread code in response to an n-th coefficient control signal. The n-th follow-up path detection unit produces n-th follow-up path information indicative of the n-th follow-up path. A follow-up path control unit controls path reception timings for the zeroth through the (N-1)-th path receivers on the basis of searched path information supplied from a multi-path searcher and zeroth through the (N-1)-th follow-up path information. The follow-up path control unit supplies the delaying unit with a path reception timing signal indicative of first through (N-1)-th delay amounts for first through (N-1)-th delay circuits in the delaying unit.