Subspace based estimation of the signal to interference ratio for TDMA cellular systems

Michael Andersin, Narayan B. Mandayam, Roy D. Yates

Research output: Contribution to journalConference articlepeer-review

52 Scopus citations


The Signal-to-Interference ratio (SIR) has been highlighted in the literature to be a most efficient criterion for several methods aiming at reducing the effects of cochannel interference, e.g. diversity reception, dynamic channel allocation and power control. In this paper we address the problem on how to obtain fast and accurate measurements of this parameter in a practical context. We develop a general SIR estimation technique for narrow-band cellular systems, that is based on a signal subspace approach using the sample covariance matrix of the received signal. Simulation results for a GSM like system show that the SIR can be estimated to within an error of 0.3 dB after only 200 ms, or within an error of 0.1 dB after only 0.6 seconds.

Original languageEnglish (US)
Pages (from-to)1155-1159
Number of pages5
JournalIEEE Vehicular Technology Conference
StatePublished - 1996
EventProceedings of the 1996 IEEE 46th Vehicular Technology Conference. Part 1 (of 3) - Atlanta, GA, USA
Duration: Apr 28 1996May 1 1996

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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