TY - GEN
T1 - Turbo multiuser detection and equalization for coded CDMA in multipath channels
AU - Wang, Xiaodong
AU - Poor, H. Vincent
N1 - Publisher Copyright:
© 1998 IEEE.
PY - 1998
Y1 - 1998
N2 - The presence of both multiple-access interference (MAI) and intersymbol interference (ISI) constitutes a major impediment to reliable communications in multipath CDMA channels. An iterative receiver structure is proposed for decoding multiuser information data in a convolutionally coded asynchronous multipath DS-CDMA system. The receiver performs two successive soft-output decisions, achieved by a soft-input soft-output (SISO) multiuser detector and a bank of single-user SISO channel decoders, through an iterative process. A low-complexity SISO multiuser detector is developed based on a novel nonlinear interference suppression technique, which makes use of both soft-interference cancellation and linear MMSE filtering. Simulation results demonstrate that the proposed receiver offers significant performance gain over the traditional non-iterative receiver structure. Moreover, at high SNR, the detrimental effects of MAI and ISI can be almost completely overcome by iterative processing, and single-user performance can be approached.
AB - The presence of both multiple-access interference (MAI) and intersymbol interference (ISI) constitutes a major impediment to reliable communications in multipath CDMA channels. An iterative receiver structure is proposed for decoding multiuser information data in a convolutionally coded asynchronous multipath DS-CDMA system. The receiver performs two successive soft-output decisions, achieved by a soft-input soft-output (SISO) multiuser detector and a bank of single-user SISO channel decoders, through an iterative process. A low-complexity SISO multiuser detector is developed based on a novel nonlinear interference suppression technique, which makes use of both soft-interference cancellation and linear MMSE filtering. Simulation results demonstrate that the proposed receiver offers significant performance gain over the traditional non-iterative receiver structure. Moreover, at high SNR, the detrimental effects of MAI and ISI can be almost completely overcome by iterative processing, and single-user performance can be approached.
KW - Convolutional codes
KW - Detectors
KW - Impedance
KW - Interference cancellation
KW - Interference suppression
KW - Intersymbol interference
KW - Iterative decoding
KW - Multiaccess communication
KW - Multiple access interference
KW - Multiuser detection
UR - http://www.scopus.com/inward/record.url?scp=84891929707&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84891929707&partnerID=8YFLogxK
U2 - 10.1109/ICUPC.1998.733676
DO - 10.1109/ICUPC.1998.733676
M3 - Conference contribution
AN - SCOPUS:84891929707
T3 - ICUPC 1998 - IEEE 1998 International Conference on Universal Personal Communications, Conference Proceedings
SP - 1123
EP - 1127
BT - ICUPC 1998 - IEEE 1998 International Conference on Universal Personal Communications, Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - IEEE International Conference on Universal Personal Communications, ICUPC 1998
Y2 - 5 October 1998 through 9 October 1998
ER -