A low complexity iterative receiver based on successive cancellation for MIMO

Research output: Chapter in Book/Report/Conference proceedingsChapterpeer-review

Abstract

Turbo-encoded multiple-input multiple-output (MIMO) systems have recently been proposed for the support of high-speed downlink packet access (HSDPA) in UMTS, where the re-use of spreading codes across the transmitter antennas results in high levels of interference. The state of the art receiver for this system incorporates a channel equalizer, followed by an a posteriori probability (APP) detector and a turbo decoder. However, the complexity of APP detection can become prohibitive since it grows exponentially with the number of transmitter antennas and the modulation order. In this paper, a MIMO receiver is proposed which replaces the optimum but complex APP detector by successive interference cancellation (SIC) incorporating sub-optimal matched filter detection. Using convolutional encoding at the transmitter, the receiver performance is sustained via iterations between the simplified detector and the convolutional decoder. In combination with a proposed novel soft-output combining scheme, it is shown that the new receiver can outperform the APP-based receiver at a much lower complexity and with no need for channel equalization.

Original languageEnglish
Title of host publicationMobile and Wireless Communications - IFIP TC6/ WG6.8 Working Conference on Personal Wireless Communications, PWC 2002
PublisherSpringer New York LLC
Pages105-112
Number of pages8
ISBN (Print)9781475710335
DOIs
Publication statusPublished - 2003
Externally publishedYes
EventIFIP TC6/ WG6.8 Working Conference on Personal Wireless Communications, PWC 2002 - , Singapore
Duration: 23 Oct 200225 Oct 2002

Publication series

NameIFIP Advances in Information and Communication Technology
Volume106
ISSN (Print)1868-4238

Conference

ConferenceIFIP TC6/ WG6.8 Working Conference on Personal Wireless Communications, PWC 2002
Country/TerritorySingapore
Period23/10/0225/10/02

Keywords

  • Iterative detection
  • MIMO
  • Order metric
  • Ordering
  • Serial interference cancellation
  • SIC
  • Soft output combining
  • Successive cancellation

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