Low-Complexity Joint Channel Estimation and LDPC Decoding for Block Fading Channel
Zhichu Lin, Zhixing Yang, Changyong Pan · 2006
This paper presents a low-complexity iterative joint channel estimation and LDPC decoding algorithm for block-fading channel. Normalized min-sum algorithm, which has a much lower complexity than sum-product algorithm, is used as LDPC decoding algorithm. By choosing an optimal normalization factor, the performance of our algorithm can be as good as its counterpart using sum-product algorithm, and only 0.3-0.5 dB away from the case where perfect CSI is known