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

fYear

2005

fDate

6-8 March 2005

Firstpage

453

Lastpage

457

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless and Optical Communications Networks, 2005. WOCN 2005. Second IFIP International Conference on

Print_ISBN

0-7803-9019-9

Type

conf

DOI

10.1109/WOCN.2005.1436067

Filename

1436067