APPARATUS AND METHOD FOR GENERATING SPREADING CODE IN CDMA COMMUNICATION SYSTEM

摘要

A device for generating a spreading code in a CDMA communication system is disclosed. In the device, an ML (Maximal Length) sequence generator generate s an ML sequence according to a generator polynomial of an ML sequence having a length 2S-1 and a given initial value, and reloads the initial value wheneve r an ML sequence having a length shorter than the length 2S-1 is generated, to repeatedly perform an operation of generating the ML sequence. A mask select or including first and second masks having a given offset, selects the first ma sk in an ML sequence period and selects the second mask in the other period. A modulo-2 adder adds an output of the ML sequence generator and an output of the mask selector to generate the spreading code, and truncates the ML sequence upon receipt of the second mask.