Transceiver design for MIMO systems with imperfect CSI at transmitter and receiver

Boon Sim Thian, Sheng Zhou, Andrea Goldsmith

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

2 Scopus citations

Abstract

We consider transceiver design in uncoded multiple-input multiple-output (MIMO) systems with noisy channel state estimates. Specifically, we design a transceiver that takes into account the statistics of the CSI errors red to minimize the average bit average rate (BER) of the system. Our design utilizes the noisy CSI estimates and the error statistics at the transmitter to partition the spatial channels into 'almost' independent streams. We also propose a joint bit and power loading (allocation) scheme to allocate information rate and power to each channel stream. Exact maximum likelihood (ML) decoding incurs a high complexity at the receiver; to circumvent this, stream-by-stream ML decoding is used at the receiver. We verify, via numerical results, that for a 4 x 4 system, the BER performance of the proposed joint bit and power loading transmission scheme far surpasses that of the schemes where only bit loading or only power loading is used. At a BER of 10-3, the joint bit and power loading scheme has an approximately 4dB gain over the bit loading scheme. In contrast, the scheme which ignores CSI errors has poor BER performance.

Original languageEnglish (US)
Title of host publication2011 IEEE International Conference on Communications, ICC 2011
DOIs
StatePublished - 2011
Externally publishedYes
Event2011 IEEE International Conference on Communications, ICC 2011 - Kyoto, Japan
Duration: Jun 5 2011Jun 9 2011

Publication series

NameIEEE International Conference on Communications
ISSN (Print)0536-1486

Other

Other2011 IEEE International Conference on Communications, ICC 2011
CountryJapan
CityKyoto
Period6/5/116/9/11

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Keywords

  • bit/power allocation
  • imperfect channel state information
  • multiple-input multiple-output communications

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