Title :
Combination of turbo equalization and turbo TCM for mobile communication system
Author :
Yang, Peng ; Ge, Jian-Hua
Author_Institution :
ISN Nat. Key Lab., Xidian Univ., Xi´´an, China
Abstract :
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.
Keywords :
Gaussian channels; channel coding; equalisers; fading channels; iterative decoding; least mean squares methods; maximum likelihood estimation; mobile communication; trellis coded modulation; turbo codes; MAP; MMSE; decoding; fading channel; intersymbol interference; iterative equalization; maximum a posteriori; minimum mean-square error; mobile communication system; soft-input-soft-output equalizer; symbol-by-symbol turbo TCM; turbo equalization; turbo trellis-coded modulation; Additive white noise; Bandwidth; Equalizers; Fading; Gaussian channels; Gaussian noise; Intersymbol interference; Iterative decoding; Mobile communication; Turbo codes;
Conference_Titel :
Communications and Information Technology, 2005. ISCIT 2005. IEEE International Symposium on
Print_ISBN :
0-7803-9538-7
DOI :
10.1109/ISCIT.2005.1566874
