On optimality of beamforming for multiple antenna systems with imperfect feedback

S. A. Jafar, A. Goldsmith

Research output: Contribution to journalConference articlepeer-review

100 Scopus citations

Abstract

We determine a necessary and sufficient condition under which beamforming (scalar coding) achieves Shannon capacity in a narrowband point to point communication system employing multiple transmit antennas and a single receive antenna. We assume perfect channel state information at the receiver (CSIR) and either channel mean or channel covariance feedback from the receiver to the transmitter. We find that better feedback quality not only increases the system capacity but also reduces the required decoding complexity at the receiver.

Original languageEnglish (US)
Pages (from-to)321
Number of pages1
JournalIEEE International Symposium on Information Theory - Proceedings
StatePublished - 2001
Externally publishedYes
Event2001 IEEE International Symposium on Information Theory (ISIT 2001) - Washington, DC, United States
Duration: Jun 24 2001Jun 29 2001

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Information Systems
  • Modeling and Simulation
  • Applied Mathematics

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