Turbo Decoding. Wcdma System Realization

WCDMA technique which is considered to be the most promising candidate for the next generation mobile radio system has received increasing attention in communication field. After briefly introducing the BaseBand procession in WCDMA system,this paper indicates a new type of channel coding method-Turbo Code,and shows the actual encoding scheme in WCDMA system. The basic principles of coding and decoding of Turbo Codes are discussed,and the MAP and Max-Log-MAP algorithms which are suitable for the Turbo Code are detailedly discussed. Then,the interleaver of Turbo code is also presented. At last,the article provides the scheme of implementation of turbo decoder in channel decoder unit.