Rate control using antenna selection for closed-loop spatial multiplexing

Youngwook Ko, Cihan Tepedelenlioglu

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

6 Scopus citations


We propose a closed-loop spatial multiplexing system with limited feedback and rate control over MIMO fading channels. The transmitter adaptation is designed to maximize spectral efficiency subject to an average bit error rate (BER) constraint by adapting the number of substreams based on a given threshold, and a fixed constellation, which determines the instantaneous rate. 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. Compared with the rate adaptive orthogonal STBC requiring highly complex constellation adaptation, the proposed rate control method achieves 5 dB power gain for a spectral efficiency of 7 bits/s/Hz at average BER of 10-4, with 2 transmit antennas.

Original languageEnglish (US)
Title of host publicationGLOBECOM'05
Subtitle of host publicationIEEE Global Telecommunications Conference, 2005
Number of pages5
StatePublished - Dec 1 2005
EventGLOBECOM'05: IEEE Global Telecommunications Conference, 2005 - St. Louis, MO, United States
Duration: Nov 28 2005Dec 2 2005

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference


OtherGLOBECOM'05: IEEE Global Telecommunications Conference, 2005
Country/TerritoryUnited States
CitySt. Louis, MO

ASJC Scopus subject areas

  • General Engineering


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