Opportunistic spectrum access in multi-user multi-channel cognitive radio networks

Sachin Shetty, Kodzo Agbedanu, Ravi Ramachandran

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations


With the advent of cognitive radio technology, opportunistic spectrum access has the potential to mitigate spectrum scarcity by letting users sense and utilize unused portions of licensed spectrum opportunistically without adverse impact on the primary licensees (licensed spectrum owner). We consider the problem of how multiple secondary users should maximize their total throughput in a multi-channel sensing-based opportunistic spectrum access network under various traffic conditions. We developed two dynamic spectrum access algorithms (Hungarian and Greedy) which allow secondary users (unlicensed opportunistic users) to access spectrum based on non-cooperative independent decisions. Both algorithms allow the secondary users to seek independent spectrum opportunities without cooperation with the objective of minimizing collisions among secondary users and maximizing the spectrum utility. Simulations comparing the performance of the two algorithms yield interesting findings.

Original languageEnglish (US)
Pages (from-to)1229-1233
Number of pages5
JournalEuropean Signal Processing Conference
StatePublished - Dec 1 2011
Event19th European Signal Processing Conference, EUSIPCO 2011 - Barcelona, Spain
Duration: Aug 29 2011Sep 2 2011

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering


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