MATCHED FILTER FOR CODE DIVISION MULTIPLEX COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a matched filter which is suitably used for, in particular, a diffusion code generated according to the repetition of a basic system in a short frequency and reduces the output error of a correlation current signal due to a current transfer error, and realizes an operation with low power consumption lower than a current cut rate by reducing the number of simultaneously operating current memories.;SOLUTION: The matched filter is provided with a first current memory circuit 31, a first input changeover switch circuit 30, a first current adding circuit 35, a first output changeover switch circuit 32, a second current memory circuit 38, a second input changeover switch circuit 37, a second current adding circuit 39, and a second output changeover switch circuit 40'. The inputted current signal is transferred only twice in any code clock period to thereby output a correlation signal.;COPYRIGHT: (C)2004,JPO