Title :
Soft output detector for MIMO-CDMA systems with parity bit selected and permutation spreading
Author :
Mirzaee, Alireza ; D´Amours, Claude
Author_Institution :
Sch. of Inf. Technol. & Eng., Univ. of Ottawa, Ottawa, ON, Canada
Abstract :
In this paper a soft output detector for a MIMO-CDMA system with data-dependent spreading waveforms is proposed. In such systems, the spreading waveforms used by transmit antennas are dependent on the transmitting data. The proposed soft output detector calculates the reliability of each detected bits in terms of LLRs, hence an outer convolutional encoder with soft input Viterbi decoder is used to further enhance BER performance. Simulation results show that the proposed system outperforms the conventional coded MIMO-CDMA systems at high SNRs.
Keywords :
MIMO systems; Viterbi decoding; code division multiple access; convolutional codes; error statistics; spread spectrum communication; transmitting antennas; waveform analysis; BER performance; LLR; MIMO-CDMA systems; data-dependent spreading waveforms; outer convolutional encoder; parity bit selected; permutation spreading; soft input Viterbi decoder; soft output detector; transmit antennas; transmitting data; Bit error rate; Convolution; Convolutional codes; Detectors; Multiaccess communication; Receiving antennas; Transmitting antennas; CDMA; MIMO; Soft output detection;
Conference_Titel :
Electrical and Computer Engineering (CCECE), 2010 23rd Canadian Conference on
Conference_Location :
Calgary, AB
Print_ISBN :
978-1-4244-5376-4
Electronic_ISBN :
0840-7789
DOI :
10.1109/CCECE.2010.5575136
