Outage behavior of MIMO cognitive radio fading channels: A causal approach

Md Z I Sarkar, Tharmalingam Ratnarajah, Mathini Sellathurai

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

Abstract / Description of output

In this paper, we study a Multiple-Input Multiple-Output (MIMO) communication scenario through Rayleigh fading cognitive radio channel in which two users, called the primary and the secondary (cognitive) users wish to communicate with two different receivers, subject to the mutual interference. The cognitive user has the causal knowledge of the message being sent by the primary user and is allowed to reuse the channel during both the idle and active periods of the primary user, as long as the primary rate remains to a particular outage rate. Here, we characterize the limits of transmission rate at which the cognitive user can reliably communicate with its receiver compensating interference to the primary user by transmitting a combined information consists of its own and primary user's information using superposition coding during the active periods of primary user. Our results show that not only cognitive user gets a non-zero outage capacity but also the outage performance of primary user is improved due to the additional diversity obtained via relaying.

Original languageEnglish
Title of host publicationProceedings - 2009 1st UK-India International Workshop on Cognitive Wireless Systems, UKIWCWS 2009
DOIs
Publication statusPublished - 1 Dec 2009
Event2009 1st UK-India International Workshop on Cognitive Wireless Systems, UKIWCWS 2009 - New Delhi, United Kingdom
Duration: 11 Dec 200912 Dec 2009

Conference

Conference2009 1st UK-India International Workshop on Cognitive Wireless Systems, UKIWCWS 2009
Country/TerritoryUnited Kingdom
CityNew Delhi
Period11/12/0912/12/09

Keywords / Materials (for Non-textual outputs)

  • cognitive user
  • Complementary cumulative distribution function (CCDF)
  • outage mutual information
  • Rayleigh fading MIMO cognitive radio channel

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