High-SNR power offset in multi-antenna Ricean channels

Antonia M. Tulino, Angel Lozano, Sergio Verdú

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


In the high-SNR regime, the multi-antenna mutual information behaves as an affine function of SNR|dB, described by the multiplexing gain, which quantifies the multiplicative increase as function of the number of antennas, and the power offset (zero-order term in dB). The conventional high-SNR analysis that considers only the multiplexing gain is unable to assess the impact of channel features such as the Ricean factor since, irrespective thereof, the multiplexing gain equals the minimum of the number of transmit and receive antennas. The impact of the Ricean factor at high SNR can be conveniently quantified through the corresponding power offset, which this paper evaluates in closed-form.

Original languageEnglish (US)
Pages (from-to)683-687
Number of pages5
JournalIEEE International Conference on Communications
StatePublished - Sep 15 2005

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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