Title :
Joint turbo-equalization and TTCM for frequency selective channels
Author :
Li, Xuan ; Song, Wen-tao ; Luo, Han-wen
Author_Institution :
Electron. Eng. Dept., Shanghai Jiao Tong Univ., China
Abstract :
This paper deals with a new receiver scheme that combines turbo equalization and turbo trellis coded modulation (TTCM). This receiver serially concatenates a soft-input soft-output (SISO) equalizer and a soft-out symbol-by-symbol MAP (maximum a posteriori) TTCM decoder through an iterative process. In certain cases, the joint turbo equalization and TTCM scheme can totally overcome the channel frequency selectivity and obtain high bandwidth efficiency and more coding gains. This scheme has modest complexity since a suboptimal reduced-state MAP equalization algorithm and simple TTCM component codes are employed. Simulation results show that this receiver can achieve comparable performance with TTCM receiver on a non-selective Gaussian channel with coding
Keywords :
Gaussian channels; concatenated codes; equalisers; fading channels; iterative decoding; maximum likelihood estimation; radio receivers; trellis coded modulation; turbo codes; Gaussian channel; bandwidth efficiency; channel frequency selectivity; coding gains; fading channels; iterative decoder; maximum a posteriori probability; receiver scheme; soft input soft output equalizer; soft-out symbol-by-symbol MAP decoder; turbo TCM; turbo equalization; turbo trellis coded modulation; wireless communication transceiver; Bandwidth; Equalizers; Fading; Frequency; Gaussian channels; Iterative algorithms; Iterative decoding; Iterative methods; Modulation coding; Turbo codes;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944586
