Alamouti-codes based four-antenna transmission schemes with phase feedback

Ilhwan Choi, Jong Kyu Kim, Heunchul Lee, Inkyu Lee

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


We present a new transmit scheme based on Alamouti codes for four transmit antenna systems with phase feedback. We propose a pre-processor for combining two Alamouti codes in terms of Frobenius norm maximization. For the proposed scheme, full diversity is achieved by the combining effect at the pre-processor. Also the phase feedback is utilized to increase an array gain. Simulation results show that the performance degradation due to the quantized feedback in the proposed scheme is small, and thus the proposed scheme exhibits a performance gain over existing closed-loop schemes with the same number of feedback bits.

Original languageEnglish
Pages (from-to)749-751
Number of pages3
JournalIEEE Communications Letters
Issue number10
Publication statusPublished - 2009

Bibliographical note

Funding Information:
Manuscript received February 5, 2009. The associate editor coordinating the review of this letter and approving it for publication was G. Mazzini. I. Choi and I. Lee are with the School of Electrical Eng., Korea University, Seoul, Korea (e-mail: {ariyan, inkyu} J.-K. Kim is with the Agency for Defense Development, Daejeon, Korea (e-mail: H. Lee is with the Information Systems Lab., Stanford University, CA, USA (e-mail: This research was supported by the MKE(Ministry of Knowledge Economy), Korea, under the ITRC(Information Technology Research Center) support program supervised by the IITA(Institute for Information Technology Advancement) (IITA-2009-C1090-0902-0013). Digital Object Identifier 10.1109/LCOMM.2009.090229


  • Multiple-input multiple-output (MIMO)
  • Phase feedback
  • Space-time block codes (STBC)

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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