Performance of iterative MAP receiver for MIMO-OFDM channels with anti-gray mapping

S. Ahmed*, T. Ratnarajah, M. Sellathurai, C. F N Cowan

*Corresponding author for this work

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

Abstract / Description of output

In recent years, due to the low complexity nature of the turbo processing and excellent bit-error-rate (BER) performance, designing turbo-like receivers for frequency-selective MIMO channels has been of great research interest. The performance gain in turbo decoders is due to an extrinsic information transfer (EXIT) process between the detection and the decoding stages as compare to a traditional system that treats these processes in isolation. However, the challenge faced with these iterative receivers is the understanding of their performance and convergence behaviour. In this paper, we study an iterative maximum a posteriori (MAP) receiver for MIMO orthogonal frequency division multiplexing (OFDM) channels and its convergence behaviour. We analyze the performance of the proposed transceiver system with Gray and anti-Gray mapping using EXIT chart and study the effects of various settings of transmit and receive antenna on the turbo cliff in BER performance.

Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference
Number of pages5
Publication statusPublished - 28 Jul 2008
Event2008 IEEE 67th Vehicular Technology Conference-Spring, VTC - Marina Bay, United Kingdom
Duration: 11 May 200814 May 2008


Conference2008 IEEE 67th Vehicular Technology Conference-Spring, VTC
Country/TerritoryUnited Kingdom
CityMarina Bay

Keywords / Materials (for Non-textual outputs)

  • Anti-Gray and Gray modulation
  • EXIT chart
  • Iterative receiver
  • MAP
  • MIMO frequency-selective channels
  • OFDM


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