Patent ID: 6539047
Filing Date: 2003-03-25
Classification: H04B,H04J,H04W

Abstract:
A device for transmitting a channel signal from a base station in a code division multiple access (CDMA) communication system which includes a first chip rate being multiple times a second chip rate, a first frame with a duration of a spreading sequence having the second chip rate and a second frame whose frame length is multiple times a length of the first frame, in order to synchronize the spreading sequence having the first chip rate with the first frame, the device comprising:a spreading sequence generator for generating a spreading sequence having the first chip rate; a sync pattern generator for generating a sync pattern for distinguishing the first frame by varying a pattern of the spreading sequence having the first chip rate at a boundary of the first frame; and a spreader for generating a sync spreading code using the spreading code having the first chip rate and the sync pattern, and spreading a transmission signal with the sync spreading code.