Receiver-Side Opportunism in Cognitive Networks

Cognitive radios may increase spectral efficiency by filling in spectral gaps, transmitting under the interference temperature, or by exploiting transmitter-side information - all methods which rely on transmitter-side cognition. In this paper, the authors shift their focus to receiver-side cognition by extending work on Opportunistic Interference Cancellation (OIC) to multi-user scenarios. They consider a single primary transmitter-receiver link which communicates simultaneously with a group of cognitive (secondary) users that form one of three classical multi-user channels: a Multiple Access Channel (MAC), Interference Channel (IC), or a Broadcast Channel (BC).

Provided by: Aalborg University Topic: Mobility Date Added: Apr 2011 Format: PDF

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