【摘要】 本文针对含有级联译码或级联均衡译码的接收机提出了一个新的软输出维特比算法，该算法克服了传统算法中系统性能、时延和运算量之间的矛盾，在获得运算量和时延有较大下降的同时，保证了系统性能更多还原

【Abstract】 In order to fully utilize the soft decision ability of the outer decoder in a concatenated system, reliability information (called soft output) from the inner decoder or equalizer is required. In this paper, based on the analysis of typical implementations of soft output VA, a novel algorithm is proposed by utilizing the property of Viterbi algorithm. Compared with the typical implementations, less processing expense is required by the new algorithm for weighting the hard decisions of VA. Meanwhile, simulation results show that, deterioration in performance of this algorithm is usually small for decoding of convolutional code and negligible for equalization.更多还原