Analysis and design of low density parity check codes for non-coherent block fading channels
Xiaowei Jin, Andrew W. Eckford, Thomas E. Fuja · 2005
This paper derives an iterative receiver for noncoherent fading channels that exhibit block fading with correlation between blocks. Pilot symbols and Kalman smoothing are used in conjunction with sum-product decoding of LDPC codes to implement an iterative channel estimation and decoding structure. Density evolution is employed to analyze the performance of such a structure and to optimize the degree profile of LDPC codes. The resulting receiver performs significantly better than receivers in which channel estimation and decoding are carried out in a tandem (non-iterative) fashion