On the value of transmitter information

Christopher Steger, Ashutosh Sabharwal

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

2 Scopus citations


Coherent signaling over a fading channel requires the receiver to have knowledge of the current fading state (CSIR). In order to proactively prevent outages, the transmitter requires knowledge of the fading state (CSIT) to perform power control. Typically, the channel state is estimated by using a training signal, and the channel state information contains some error. In this work, we examine the performance of a symmetric, single-input, multiple-output (SIMO) channel in which both the transmitter and the receiver have independent, imperfect estimates of the channel. We give expressions for mutual information and outage probability, and we use those expressions to evaluate the diversity order of the system for a constant target rate. We show that diversity order is dominated by the transmitter error and that the diversity order is equal to that of a system with perfect CSIR.

Original languageEnglish (US)
Title of host publicationProceedings - 2007 IEEE Radio and Wireless Symposium, RWS
Number of pages4
StatePublished - 2007
Event2007 IEEE Radio and Wireless Symposium, RWS - Long Beach, CA, United States
Duration: Jan 9 2007Jan 11 2007

Publication series

NameProceedings - 2007 IEEE Radio and Wireless Symposium, RWS


Conference2007 IEEE Radio and Wireless Symposium, RWS
Country/TerritoryUnited States
CityLong Beach, CA

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering


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