Reduced-complexity receiver structures for space-time bit-interleaved coded modulation systems

Inkyu Lee, Carl Erik W. Sundberg

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Transmission efficiency in radio channels can be considerably improved by using multiple transmit and receive antennas and employing a family of schemes called spacetime (ST) coding. Both extended range and/or improved bandwidth efficiency can be achieved, compared with a radio link with a single transmit and receive antenna. Bit-interleaved coded modulation schemes give diversity gains on fading channels with higher order modulation constellations combined with conventional binary convolutional codes also for the case of a single transmit and receive antenna radio link. In this paper, we study a family of flexible bandwidth-efficient ST coding schemes which combine these two ideas in a narrowband flat-fading channel and single-carrier modems. We address receiver complexity for the case of a large number of transmit antennas and higher order modulation constellations. Especially, we focus on practical configurations, where the number of transmit antennas is greater than that of receive antennas. Simplified receivers using tentative decisions are proposed and evaluated by means of simulations. Tradeoffs between complexity reduction and performance loss are presented. We emphasize systems that are of particular interest in applications where the number of transmit antennas exceeds the number of receive antennas. A system with four transmit antennas with an eight-fold complexity reduction and a performance loss of about 1 dB is demonstrated.

Original languageEnglish
Pages (from-to)142-150
Number of pages9
JournalIEEE Transactions on Communications
Issue number1
Publication statusPublished - 2007 Jan

Bibliographical note

Funding Information:
Paper approved by H. El-Gamal, the Editor for Space–Time Coding and Spread Spectrum of the IEEE Communications Society. Manuscript received March 12, 2003; revised December 21, 2004. This work was supported by the Ministry of Information and Communication (MIC), Korea, under the Information Technology Research Center (ITRC) support program, supervised by the Institute of Information Technology Assessment (IITA). This paper was presented in part at the IEEE International Conference on Vehicular Technology, May 2003.


  • Coded modulation
  • Iterative decoding
  • Multiple antennas
  • Reduced-complexity receiver
  • Space-time codes (STCs)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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