Title :
Coded modulation assisted iterative parallel interference cancellation aided CDMA
Author :
Wei, H. ; Ng, S.X. ; Hanzo, L.
Author_Institution :
Dept. of ECS, Southampton Univ., UK
Abstract :
We investigate trellis coded modulation (TCM) and turbo trellis coded modulation (TTCM) assisted iterative parallel interference cancellation aided CDMA schemes. The symbol-based maximum a posteriori (MAP) algorithm is invoked in both the TTCM and TCM decoder. In the context of the 8PSK TCM/TTCM CDMA schemes, typically two iterations are necessary for approaching the best possible performance attained with the aid of an infinite number of iterations. By contrast, the number of iterations has to be increased to three or four in conjunction with 16QAM when the effective information throughput is increased from 2 to 3 bits per symbol.
Keywords :
interference suppression; iterative methods; maximum likelihood decoding; maximum likelihood estimation; multiuser detection; phase shift keying; quadrature amplitude modulation; radio receivers; trellis coded modulation; turbo codes; CDMA; MAP algorithm; MAP decoder; PSK; QAM; TCM; iterative multiuser detection; iterative parallel interference cancellation; maximum a posteriori algorithm; receiver; turbo trellis coded modulation; Detectors; Fading; Interference cancellation; Iterative algorithms; Iterative decoding; Modulation coding; Multiaccess communication; Multipath channels; Multiuser detection; Signal processing;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285193
