Exploiting Multichannel Diversity in Cognitive Radio Networks

Free registration required

Executive Summary

Cognitive radios hold tremendous promise for increasing spectral efficiency in wireless systems. In cognitive radio networks, secondary users equipped with frequency-agile cognitive radios communicate with one another via spectrum that is not being used by the primary, licensed users of the spectrum. The authors consider a multichannel cognitive radio network scenario in which a secondary transmitter can switch to different channels for opportunistic communications. Multichannel diversity can be achieved by dynamically switching to different channels during transmission. Their numerical results show that even a simple randomized channel switching scheme can significantly reduce the average symbol error probability.

  • Format: PDF
  • Size: 122.9 KB