Correlation circuit for spread spectrum communications systems

摘要

A correlation circuit for spread spectrum communication is disclosed, which can demodulate users having superposed demodulation phases and equaling or exceeding a sum of products calculation processing ability without enlarging circuit overhead. When a plurality of users higher than a specified number exists in the same phase of the input signal, a controller (10) lowers the shift transfer rate of one sample in an input signal register (101) in order to hold a sufficient time for completing calculation of a sum of products with all the plurality of users in a sum of products calculator (105) in the correlation circuit for spread spectrum communication.