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Combination of turbo equalization and turbo TCM for mobile communication system

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2 Author(s)
Peng Yang ; ISN Nat. Key Lab., Xidian Univ., Xi'an, China ; Jian-Hua Ge

A novel low-complexity scheme of turbo trellis-coded modulation (TCM) iterative equalization and decoding is presented, which serially concatenates a soft-input-soft-output (SISO) equalizer and symbol-by-symbol turbo TCM (TTCM) decoder through an iterative process in order to realize iterative equalization and decoding process. This scheme can not only improve the bandwidth efficiency, but also reduce the intersymbol interference (ISI). The equalizer with maximum a posteriori (MAP) is replaced with linear one based on minimum mean-square error (MMSE) at the receiver so that the complexity of the system can be reduced greatly. Computer simulation results show that the novel low-complexity receiver on fading channel can achieve comparable performance with TTCM on Gaussian channel with coding.

Published in:

IEEE International Symposium on Communications and Information Technology, 2005. ISCIT 2005.  (Volume:1 )

Date of Conference:

12-14 Oct. 2005