RECEIVER FOR CODE DIVISION MULTIPLE ACCESS COMMUNICATION

摘要

PROBLEM TO BE SOLVED: To optimize the S/N of a synthesis signal at all times independently of the quantity of the delay spread of a delay wave by controlling window width optimum to the delay spread. SOLUTION: The output of correlation devices is A/D-converted, a correlation output level is detected respectively for each one-chip period, a delay spreadτs is obtained based on the detection level and an optimum tap number (m) is read from a memory 124 based on theτs. Then a delay signal is extracted from each of m-sets of taps of delay lines 410, 411, the signals are synthesized at a maximum ratio and a demodulation output is obtained from a synthesis circuit 409.