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计算机应用研究 2011
Fast Log MAP decoding method of Turbo code
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Abstract:
Log-MAP algorithm is a simplified decoding method of Turbo code. The algorithm has the defects of high complexity and decoding delay. A simplified log maximum a posteriori (Log-MAP) algorithm is presented based on approximation theory in this paper. In the simplified algorithm, the sectional optimal square approximation polynomial is adopted to calculate the correction function. Compared with the standard Log-MAP algorithm, the simplified algorithm has the advantages of low complexity, low decoding delay. And the decoding performance is similar to the standard Log-MAP algorithm. So it is more suitable for using in practical engineering.