Design of Shortened Turbo Product Codes And Their Improved Decoding

Abstract

In this paper, a general matrix structure for shortened turbo product codes (TPC) and an improved decoding algorithm based on Chase decoder are presented. In the proposed algorithm, the decoding complexity is decreased by reducing the number of candidate codewords and, an efficient method to estimate the extrinsic information without competing codeword is designed, too. Compared with the conventional algorithm, simulation results show that considerable coding gains can be obtained by the proposed decoding algorithm with decreasing decoding complexity.