Abstract-Cognitive radios are promising solutions to the problem of overcrowded and inefficient licensed spectrum. In this work we explore the throughput potential of cognitive communication. We summarize different cognitive radio techniques that underlay, overlay and interweave the transmissions of the cognitive user with those of the licensed users. Recently proposed models for cognitive radios based on the overlay technique are described. For the interweave technique, we present a 'two switch' cognitive radio model and develop inner and outer bounds on the secondary radio capacity. Using the two switch model, we investigate the inherent tradeoff between the sensitivity of primary detection and the cognitive link capacity. With numerical results, we compare the throughputs achieved by the secondary user in the different models.
Srinivasa and Jafar REF carried out a theoretical study on the throughput potential of cognitive radios using different cognitive perspectives.
The Throughput Potential of Cognitive Radio: A Theoretical Perspective
2006 Fortieth Asilomar Conference on Signals, Systems and Computers
2006 Fortieth Asilomar Conference on Signals, Systems and Computers
Computer Science