Title :
Low-Complexity Channel-Likelihood Estimation for Non-Binary Codes and QAM
Author :
He, Guanghua ; Sarkis, Gabi ; Hemati, Saied ; Gross, Warren J. ; Bai, Baoming
Author_Institution :
State Key Lab. of Integrated Service Networks, Xidian Univ., Xi´´an, China
fDate :
6/1/2012 12:00:00 AM
Abstract :
An approximate channel-likelihood estimation algorithm is introduced for non-binary coded, square quadrature-amplitude-modulated systems. It is shown that the proposed approximation greatly simplifies the calculation of channel-likelihoods and yet provides results close to those based on exact calculations for non-binary low-density parity-check codes over the additive white Gaussian noise channel.
Keywords :
AWGN channels; binary codes; channel estimation; quadrature amplitude modulation; QAM; additive white Gaussian noise channel; approximate channel-likelihood estimation algorithm; low-complexity channel-likelihood estimation; nonbinary code; nonbinary low-density parity-check code; square quadrature-amplitude-modulated systems; Approximation methods; Complexity theory; Decoding; Parity check codes; Quadrature amplitude modulation; Signal to noise ratio; Table lookup; Channel-likelihoods; QAM; non-binary LDPC codes;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.042312.120382
