Ldpc codes for non-coherent block fading channels with correlation: analysis and design

• Published in: IEEE transactions on communications Vol. 56; no. 1; pp. 70 - 80
• Main Authors: Xiaowei Jin, Eckford, A.W., Fuja, T.E.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.01.2008; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithm design and analysis; Applied sciences; AWGN; Blocking; Channels; Coding, codes; Correlation analysis; Density; Design engineering; Design optimization; Evolution; Exact sciences and technology; Fading; Gain; Information, signal and communications theory; Iterative decoding; Kalman filters; OFDM; Parity check codes; Performance analysis; Signal and communications theory; Smoothing methods; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Fading channels; Block fading channels; Correlation analysis; Gauss-Markov channels; estimation-decoding; Parity check codes; Error correcting code; Decoding; low-density parity-check codes; Algorithm
• ISSN: 0090-6778; 1558-0857
• DOI: 10.1109/TCOMM.2008.050087

LDPC codes are analyzed and optimized for a noncoherent block fading channel in which there is correlation between the blocks. This extends related work in the literature which considered independent blocks. Low-complexity estimation and estimation-decoding algorithms based on Kalman smoothing are developed, and density evolution is used to analyze and optimize the resulting code. Results indicate that significant gains can be realized by taking inter-block correlation into account, compared to architectures in which the blocks are assumed to be independent.