MIMO block-fading channels with mismatched CSI

A. Taufiq Asyhari, Albert Guillen I Fabregas

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We study transmission over multiple-input multiple-output block-fading channels with imperfect channel state information (CSI) at both the transmitter and receiver. In particular, based on mismatched decoding theory for a fixed channel realization, we investigate the largest achievable rates with independent and identically distributed inputs and the nearest neighbor decoder. We then study the corresponding information outage probability in the high signal-to-noise ratio (SNR) regime and analyze the interplay between estimation error variances at the transmitter and receiver to determine the optimal outage exponent, defined as the high-SNR slope of the outage probability plotted in a logarithmic-logarithmic scale against the SNR. We demonstrate that despite operating with imperfect CSI, power adaptation can offer substantial gains in terms of outage exponent.

Original languageEnglish
Article number6895172
Pages (from-to)7166-7185
Number of pages20
JournalIEEE Transactions on Information Theory
Volume60
Issue number11
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes

Keywords

  • Block fading
  • diversity
  • generalized mutual information
  • imperfect channel state information
  • MIMO,mismatched decoding
  • multiple antenna
  • nearest neighbor decoding
  • outage exponent
  • outage probability
  • power adaptation

ASJC Scopus subject areas

  • Information Systems
  • Computer Science Applications
  • Library and Information Sciences

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