SISO Based Turbo Equalization and Decoding for ISI Corrupted Wireless Channels
ICCTA '07 Proceedings of the International Conference on Computing: Theory and Applications
Low complexity turbo equalization for high data rate wireless communications
EURASIP Journal on Wireless Communications and Networking
Minimum mean squared error equalization using a priori information
IEEE Transactions on Signal Processing
Linear turbo equalization analysis via BER transfer and EXIT charts
IEEE Transactions on Signal Processing - Part I
Analysis of sum-product decoding of low-density parity-check codes using a Gaussian approximation
IEEE Transactions on Information Theory
Iterative turbo decoder analysis based on density evolution
IEEE Journal on Selected Areas in Communications
Turbo equalization: adaptive equalization and channel decoding jointly optimized
IEEE Journal on Selected Areas in Communications
A low complexity approach to turbo equalizer
WSEAS Transactions on Signal Processing
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This paper investigates a new soft interference canceller (SIC) based turbo equalizer. The SIC is configured as a decision feedback (DF) equalizer that uses two linear transversal filters. Both the filters update their taps as per the least mean square (LMS) algorithm. This receiver is different from the receivers discussed in literature in the sense that it uses the soft outputs of both the equalizer and the decoder in order to provide an improved estimate of the post cursors. It also uses the variance of the soft data bit estimates in its computation of the log-likelihood ratios (LLR). Probability distribution function for the soft data bit estimate is derived. This SIC based turbo equalizer is shown to result in a faster convergence and improved error floor at the decoder output. This study is carried out for a two typical highly frequency selective channels in order to establish the better performance of the proposed receiver.