Title :
Turbo EM based equalization for multi-user multi-carrier space time system
Author :
Ferré, G. ; Syed, M.J. ; Cances, J.-P. ; Meghdadi, V. ; Khani, G.R.M.
Author_Institution :
ENSIL-GESTE, Limoges Univ., France
Abstract :
In this paper, we propose a multi-user detector for space time uplink transmission in multi-carrier CDMA systems. We propose a new combination using STBC, OFDM and CDMA spreading. Furthermore we propose a turbo equalization scheme based on the use of LDPC for channel coding and EM algorithm for channel estimation at the LDPC decoder input. Simulation results show that our proposed receiver is able to function within 2 dB from the outage capacity of the studied multi-path channel.
Keywords :
OFDM modulation; block codes; channel coding; channel estimation; code division multiple access; expectation-maximisation algorithm; multiuser detection; parity check codes; space-time codes; LDPC decoder input; OFDM; STBC; channel coding; channel estimation; code division multiple access; low density parity check code; multi-carrier CDMA systems; multi-path channel; multi-user detector; multi-user multi-carrier space time system; orthogonal frequency division multiplexing; space time uplink transmission; space-time block coding; turbo EM based equalization; Block codes; Channel coding; Channel estimation; Decoding; Detectors; Multiaccess communication; OFDM; Parity check codes; Transmitters; Transmitting antennas;
Conference_Titel :
Networks, 2005. Jointly held with the 2005 IEEE 7th Malaysia International Conference on Communication., 2005 13th IEEE International Conference on
Print_ISBN :
1-4244-0000-7
DOI :
10.1109/ICON.2005.1635521
