An equal gain transmission in MIMO wireless communications

Shang-Ho Tsai*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations


The maximum SNR loss between equal gain transmission (EGT) and the optimal scheme, i.e. maximum ratio transmission (MRT) is 1.05 dB in MISO channels. However, little is known about the performance loss of EGT in MIMO channels, since there is no simple closed-form solution available for the best EGT in MIMO channels. In this study, an EGT design for MIMO channels is proposed and its performance is analyzed theoretically. Interestingly, the SNR loss between the proposed EGT and the MRT in MIMO channels is shown to be at most 1.05 dB as well. Unlike the optimal MRT, which requires both magnitude and phase information of channels, EGT only needs phase information and hence has several implementional advantages compared to the MRT; that is, it can greatly relax the effort of power amplifier and computational complexity. Consequently, simple transceiver design can be realized using the proposed EGT with small performance degradation.

Original languageEnglish
Title of host publication2010 IEEE Global Telecommunications Conference, GLOBECOM 2010
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781424456383
StatePublished - 2010
Event53rd IEEE Global Communications Conference, GLOBECOM 2010 - Miami, FL, United States
Duration: 6 Dec 201010 Dec 2010

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference


Conference53rd IEEE Global Communications Conference, GLOBECOM 2010
Country/TerritoryUnited States
CityMiami, FL


  • Beamforming
  • EGT
  • Equal gain transmission
  • MIMO
  • MRT
  • Precoding


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