Title :
Design of a turbo coded OFDM/CDMA transmitter-receiver with QPSK signal mapping
Author :
Ginige, Thilak ; Rajatheva, Nandana ; Ahmed, K.M.
Author_Institution :
Telecommun. Program/SAT, Asian Inst. of Technol., Pathumthani, Thailand
Abstract :
In this paper the performance of a turbo coded OFDM/CDMA system with QPSK signal mapping under additive white Gaussian noise (AWGN) with no fading and with multipath fading channel is analyzed and simulated. For turbo codes, the max-log-MAP algorithm is employed because it is a less complex sub-optimal algorithm for iterative decoding. Evaluation of the proposed receiver by means of computer simulation has shown substantial performance improvement for both non-fading and multipath fading environments under AWGN
Keywords :
AWGN channels; OFDM modulation; code division multiple access; fading channels; iterative decoding; multipath channels; quadrature phase shift keying; radio receivers; radio transmitters; turbo codes; AWGN; QPSK signal mapping; additive white Gaussian noise; iterative decoding; max-log-MAP algorithm; multi-path fading channel; nonfading channel; turbo coded OFDM/CDMA transmitter-receiver; AWGN; Additive white noise; Fading; Iterative algorithms; Multiaccess communication; OFDM; Quadrature phase shift keying; Signal analysis; Signal mapping; 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.2001.944486
