TY - GEN
T1 - Non-linear methods for group-blind multiuser detection
T2 - 25th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2000
AU - Host-Madsen, Anders
AU - Spasojevic, Predrag
AU - Wang, Xiaodong
N1 - Publisher Copyright:
© 2000 IEEE.
PY - 2000
Y1 - 2000
N2 - This paper considers the problem of multiuser detection for CDMA systems where the codes of a group of users are known while others are unknown, called group-blind multiuser detectors. An example is the uplink in cellular communication system with interference from both in-cell users, with known codes, and out-of-cell users, with unknown codes. In previous papers linear detectors for this situation were developed. In the current paper, we combine these methods with low-complexity non-linear post processing, using the method of slowest descent, a general method for non-linear optimization. The performance of this new group-blind detector is compared to that of the non-blind MMSE detector as well as the linear group blind detector, and the non-linear detector is seen to have a considerably better performance, in particular in heavily loaded systems.
AB - This paper considers the problem of multiuser detection for CDMA systems where the codes of a group of users are known while others are unknown, called group-blind multiuser detectors. An example is the uplink in cellular communication system with interference from both in-cell users, with known codes, and out-of-cell users, with unknown codes. In previous papers linear detectors for this situation were developed. In the current paper, we combine these methods with low-complexity non-linear post processing, using the method of slowest descent, a general method for non-linear optimization. The performance of this new group-blind detector is compared to that of the non-blind MMSE detector as well as the linear group blind detector, and the non-linear detector is seen to have a considerably better performance, in particular in heavily loaded systems.
UR - https://www.scopus.com/pages/publications/0033721595
UR - https://www.scopus.com/pages/publications/0033721595#tab=citedBy
U2 - 10.1109/ICASSP.2000.861147
DO - 10.1109/ICASSP.2000.861147
M3 - Conference contribution
AN - SCOPUS:0033721595
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 2929
EP - 2932
BT - CommunicationsSensor Array and Multichannel Signal Processing
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 5 June 2000 through 9 June 2000
ER -