Turbo multiuser receiver for space-time turbo coded downlink CDMA

J Shen, A G Burr

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper we consider multiple-input multiple-output (MIMO) downlink CDMA systems employing BLAST space-time Turbo codes (STTuC) over the frequency-selective fading channel. In this case, there is a mixture of multiple access interference (MAI), inter-antenna interference (IAI) and inter-symbol interference (ISI) which needs to be suppressed. Here we develop an iterative receiver structure that can combat the different species of interferences at the same time. The proposed receiver is designed following the 'Turbo Principle' and based on Parallel Interference Cancellation (PIC). In every iteration, the soft output of the space-time Turbo decoder is fed back to improve the PIC's performance. The simulation results suggest that the proposed iterative receiver can reject the interference for STTuC CDMA systems effectively. An improved STTuC CDMA system with antenna specific scrambling is also introduced, in which the proposed receiver can avoid excessive performance degradation in slow fading rural environment.

Original languageEnglish
Title of host publication57TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, VTC 2003-SPRING, VOLS 1-4, PROCEEDINGS
Place of PublicationNEW YORK
PublisherIEEE
Pages1099-1103
Number of pages5
ISBN (Print)0-7803-7757-5
Publication statusPublished - 2003
Event57th IEEE Vehicular Technology Conference - Cheju Isl
Duration: 22 Apr 200325 Apr 2003

Conference

Conference57th IEEE Vehicular Technology Conference
CityCheju Isl
Period22/04/0325/04/03

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