Name
Abstract | ||
|---|---|---|
We consider a cognitive radio (CR) relay network consisting of a cognitive source, a cognitive destination and a number of cognitive relay nodes that share spectrum with a primary transmitter and receiver. Due to poor channel conditions, the cognitive source is unable to communicate directly with the cognitive destination and hence employs the cognitive relays for assistance. We assume that perfect channel state information (CSI) for all links is not available to the CR. Under the assumption of partial and imperfect CSI at the CR system, we propose new robust CR cooperative relay beamformers where either the total relay transmit power or the cognitive destination signal-to-interference-and-noise ratio (SINR) is optimized subject to a constraint on the primary receiver outage probability. We formulate the robust total relay power minimisation and the cognitive destination SINR maximisation optimisation problems as a convex second order cone program and a semidefinite program, respectively. Cumulative distribution functions of primary receiver and cognitive destination receiver SINR for Rayleigh fading channels are presented. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/TWC.2014.2331074 | IEEE Transactions on Wireless Communications |
Keywords | Field | DocType |
relay networks (telecommunication),cognitive destination,power control,relay,robust beamforming,relay networks,cooperative communication,cognitive radio,semidefinite relaxation,convex optimisation,primary transmitter,cognitive relay node,rayleigh fading channel,beamforming,robust cognitive radio cooperative beamforming,array signal processing,cooperative beamforming,relay transmit power,outage probability,signal-to-interference-noise ratio,relay power minimisation,spectrum sharing,imperfect channel state information,cognitive source,partial csi,primary receiver outage probability,sinr optimization,interference management,rayleigh channels | Relay channel,Beamforming,Transmitter,Transmitter power output,Rayleigh fading,Computer network,Mathematics,Relay,Channel state information,Cognitive radio | Journal |
Volume | Issue | ISSN |
13 | 11 | 1536-1276 |
Citations | PageRank | References |
5 | 0.42 | 25 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Sudhir Singh | 1 | 22 | 2.44 |
| Paul D. Teal | 2 | 104 | 13.58 |
| Pawel A. Dmochowski | 3 | 144 | 25.36 |
| Alan J. Coulson | 4 | 283 | 31.45 |