Temporal spectrum sharing based on primary user activity prediction
IEEE Transactions on Wireless Communications
Outage analysis in presence of correlated interferers in a cognitive radio CDMA network
International Journal of Communication Networks and Distributed Systems
Journal of Signal Processing Systems
Influence of spatial statistics of spectrum use on the performance of cognitive wireless networks
Proceedings of the 15th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
Power allocation in the TV white space under constraint on secondary system self-interference
Journal of Electrical and Computer Engineering
Proportional fair power allocation for secondary transmitters in the TV white space
Journal of Electrical and Computer Engineering
Hi-index | 0.00 |
The objective of this work is to assess some fundamental limits for opportunistic spectrum reuse via cognitive radio in a frequency-planned environment. We present a first order analysis of the signal-to-noise-and-interference situation in a wireless cellular network, and analyze the impact of cognitive users starting to transmit. Two main conclusions emerge from our study. First, obtaining any substantial benefits from opportunistic spatial spectrum reuse in a frequency-planned network without causing substantial interference is going to be very challenging. Second, the cognitive users need to be more sensitive, by orders of magnitude, than the receivers in the primary system, especially if there is significant shadow fading. This latter problem can be alleviated by having cognitive users cooperate, but only if they are separated far apart so that they experience independent shadowing.