Analysis of Joint Channel Estimation and LDPC Decoding on Block Fading Channels
Xiaowei Jin, Andrew W. Eckford, E. Fuja · 2004
This paper presents an iterative receiver for the phase coherent block fading channel. The receiver jointly estimates the channel and decodes a low density parity check (LDPC) code via the sum-product algorithm. This scheme is analyzed through the use of density evolution, resulting in the computation of thresholds for regular LDPC codes over block fading channels of varying memory sizes. As the channel memory increases, the threshold gap between joint channel estimation/decoding and iterative decoding with perfect channel knowledge narrows. Simulation results that support the threshold results are provided. 1.