Turbo codes are adopted for high rate data services in many proposal of the third generation mobile communication system IMT2000 Therefore, lowcomplexity and nearoptimum turbo decoding algorithms should be need This paper presents an efficient improving of the MaxLogMAP decoding algorithm by using a scaling factor within the extrinsic calculation to achieve the tradeoff between lowcomplexity and performance The improved MaxLogMAP is about 0 2~0...