RAKE RECEIVER FOR DIRECT SPREADING CDMA TRANSMISSION

摘要

The baseband of a spread-baseband modulated signal inputted into a matched filter (131) is despread by means of the output from a spread code replica generating section (132). The despread signal at L timings is multiplied by a weighting factor by a multiplier (201). The product output is demodulated by a demodulator (202), and the demodulated signal is subjected to RAKE synthesization by an adder (118). The synthesization output is judged by a data judging section (203), and an error signal at the time of the judgment is generated from an error signal generating section (204). A weighting factor to minimize the judgment error is determined from the L despread signal and the error signal. Thus, a multipath signal is generated by RAKE synthesization while reducing the influence of noise and interference signal.