Threshold-based substream selection combining for adaptive spatial multiplexing

Youngwook Ko, Cihan Tepedelenlioglu

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

4 Scopus citations

Abstract

We propose a novel closed-loop spatial multiplexing method with limited feedback and low bit error rates over MIMO fading channels. The transmitter adaptation is designed to satisfy spectral efficiency and average transmit power constraints. The transmit adaptation is performed simply by selecting the number of sub-streams based on a given threshold with a fixed nonadaptive constellation and transmit power per substream. The proposed system chooses the substream selection threshold as a function of the slowly changing average SNR. We analyze the performance of the proposed system by deriving closed-form expressions for spectral efficiency, average transmit power, and BER. Under spectral efficiency and average transmit power constraints, we show that the average BER decreases exponentially in terms of average SNR over fading channels. We present numerical and simulation results that validate our analysis.

Original languageEnglish (US)
Title of host publicationIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
Pages700-704
Number of pages5
Volume2005
DOIs
StatePublished - 2005
Event2005 IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2005 - New York, NY, United States
Duration: Jun 5 2005Jun 8 2005

Other

Other2005 IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2005
CountryUnited States
CityNew York, NY
Period6/5/056/8/05

ASJC Scopus subject areas

  • Signal Processing
  • Engineering(all)

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    Ko, Y., & Tepedelenlioglu, C. (2005). Threshold-based substream selection combining for adaptive spatial multiplexing. In IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC (Vol. 2005, pp. 700-704). [1506230] https://doi.org/10.1109/SPAWC.2005.1506230