Title :
STTC-SD with LMMSE multi-user detection for WCDMA downlink
Author :
Thirukkumaran, S. ; Pang, K.K.
Author_Institution :
Centre for Telecommun. & Inf. Eng., Monash Univ., Melbourne, Vic., Australia
Abstract :
In this paper we analyze the performance of space time trellis coded-scrambling diversity (STTC-SD) scheme for WCDMA downlink, when a linear minimum mean squared error multi-user detection (LMMSE-MUD) receiver is used. STTC-SD scheme for CDMA systems was introduced in (S. Thirukkumaran and K.K. Pang, 2004) and was shown to perform better than conventional STTC scheme under low system loads. At high system loads, the STTC-SD scheme suffers excessively from multiple access interference. In this paper we show that, by using a LMMSE-MUD receiver, this problem can be rectified so that STTC-SD scheme performs significantly better than standard STTC scheme at all system loads.
Keywords :
broadband networks; code division multiple access; diversity reception; mean square error methods; multiuser detection; radio links; radio receivers; space-time codes; trellis codes; CDMA systems; LMMSE; WCDMA downlink; minimum mean squared error; multiple access interference; multiuser detection receiver; space time trellis coded-scrambling diversity scheme; Downlink; MIMO; Multiaccess communication; Multiple access interference; Multiuser detection; Performance analysis; Proposals; Receiving antennas; Transmitters; Transmitting antennas;
Conference_Titel :
Wireless and Optical Communications Networks, 2005. WOCN 2005. Second IFIP International Conference on
Print_ISBN :
0-7803-9019-9
DOI :
10.1109/WOCN.2005.1436067
