Patent ID: 6731675
Filing Date: 2004-05-04
Classification: H04B

Abstract:
A receiving device for a spread spectrum communication system comprising:a correlation arithmetic part which performs a cross correlation arithmetic between a code sequence and a received signal; an integrator which integrates a correlation output generated by said correlation arithmetic part; a holding part which holds an integrated output generated by said integrator; an error detector which generates an error signal indicative of a phase difference between said code sequence and said received signal based on a holding signal held by said holding part; and a code sequence generator which performs a phase control operation so that said code sequence match in phase with said received signal based on said error signal generated by said error detector and supplies a phase-controlled code sequence to said correlation arithmetic part, wherein said correlation arithmetic part performs a cross correlation arithmetic between data other than original data which is included in said received signal and said code sequence and a cross correlation arithmetic between said original data included in said received data and said code sequence in a time-sharing fashion, and said holding part holds integrated outputs outputted from said integrator when said correlation arithmetic part performs said cross correlation arithmetic between said data other than said original data which is included in said received signal and said code sequence.