CODE DIVISION MULTIPLEX COMMUNICATION RECEIVER

摘要

PURPOSE:To eliminate mutual interference due to inverse correlation filtering processing even when a large number of communication channels simultaneously received exist. CONSTITUTION:A reception signal subjected to inverse-spread by the use of N correlators 121-12N, and N inverse spread output are multiplied by a square matrix R0<-1> as NXN input vectors by a multiplier circuit 13. The outputs are delayed by length KT(T: symbol) and supplied to an adder circuit 16, and also to a serial circuit of processing units 171-17k-1 with (K-1) stages. Each processing unit computes (-1) (R0<-1>(R1+R1z<-2>)), and each output is supplied to the adder circuit 16 via delay circuits 191-18k-1 of (K-1)T-(K-K)T. An inverse correlation filter including the inverse matrix computation of NXN rational function matrices is approximated in a form not including the inverse matrix computation of the rational function matrix by developing its transfer function.