Title :
Turbo TCM Coded OFDM Systems for Non-Gaussian Channels
Author :
Wang, Yanxia ; Wei, Lei
Author_Institution :
Dept. of Electr. & Comput. Eng., Central Florida Univ., Orlando, FL
Abstract :
The aim of this paper is to investigate the effect of impulsive noise on the performance of the turbo TCM coded OFDM system. We construct a punctured parity-concatenated trellis code which functions as a turbo TCM code but with much lower complexity and explore their application in OFDM systems using 64QAM constellation to offer higher spectral efficiency. The conventional iterative bit MAP decoding algorithm is modified to catch up the corresponding impulsive noise statistical characteristics. The bit error rate (BER) performance of the TTCM coded OFDM systems over both AWGN channel and UWB channel with impulsive noise is evaluated through simulation. The study shows several essential requirements to achieve high data rate transmission for non-Gaussian channels
Keywords :
AWGN channels; OFDM modulation; concatenated codes; data communication; error statistics; impulse noise; iterative decoding; maximum likelihood decoding; quadrature amplitude modulation; trellis coded modulation; turbo codes; ultra wideband communication; 64QAM constellation; AWGN channel; UWB channel; bit error rate performance; conventional iterative bit MAP decoding algorithm; data rate transmission; impulsive noise; nonGaussian channels; punctured parity-concatenated trellis code; spectral efficiency; turbo TCM coded OFDM systems; Additive white noise; Bit error rate; Convolutional codes; Fading; Gaussian noise; Intersymbol interference; Iterative algorithms; Iterative decoding; OFDM modulation; Working environment noise;
Conference_Titel :
Information Theory, 2006 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
1-4244-0505-X
Electronic_ISBN :
1-4244-0504-1
DOI :
10.1109/ISIT.2006.262074
