Patent ID: 6236648
Filing Date: 2001-05-22
Classification: H04B

Abstract:
A code division multiple access receiver comprising:an A/D converter for over-sampling an analog reception baseband signal with a sampling clock having a frequency 2.sup.n times higher than that of a chip clock and converting said analog reception baseband signal into a digital reception baseband signal;a correlator for obtaining a correlation value between said digital reception baseband signal and a pilot spreading code which is synchronous with a reception timing;a phase difference detecting unit for obtaining a phase difference between said digital reception baseband signal and said reception timing based on said correlation value; anda timing controlling unit for changing said reception timing in such a manner as to eliminate said phase difference, said timing controlling unit including a chip phase shifting unit for changing said reception timing in chips, and a 1/2.sup.n -chip phase shifting unit for changing said reception timing in 1/2.sup.n chips.