Name
Title | ||
|---|---|---|
Power saving for cooperative spectrum sharing-based cognitive radios under primary user short-term rate protection. |
Abstract | ||
|---|---|---|
In cooperative spectrum sharing-based cognitive radio systems, the secondary user (SU) acts as a cooperator of the primary user (PU) to assist the PUs transmission and is allowed to simultaneously transmit at the same spectrum only if it is not harmful to the primary transmission. Here the authors studies a power minimising problem of the SU with real-time services for this system under constraints on the SUs quality-of-service requirement and guaranteeing the PUs instantaneous rate unchanged if the SU allocates part of its power for its own transmissions. Superposition coding (SC) is further employed by the SU to eliminate the interference caused by the PU. The problem is formulated as an optimisation problem. Owing to its high complexity, this problem is then converted into a single variable optimisation problem, and a greedy-based power minimisation method with low complexity is thus proposed. Numerical comparison shows that the proposed method can lead to reductions in the secondary transmission power of about 30 and 14 against for the non-SC one and the equal bit allocation-based one, respectively. © 2012 The Institution of Engineering and Technology. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1049/iet-com.2011.0456 | IET Communications |
Keywords | Field | DocType |
cognitive radio,cooperative communication,quality of service,radio spectrum management,radiofrequency interference,cognitive radio system,cooperative spectrum sharing,equal bit allocation,greedy-based power minimisation method,interference elimination,power minimising problem,power saving,primary user short-term rate protection,quality-of-service requirement,secondary user,single variable optimisation problem,superposition coding | Power saving,Computer network,Quality of service,Superposition coding,Minimisation (psychology),Bit allocation,Interference (wave propagation),Spectrum sharing,Mathematics,Cognitive radio | Journal |
Volume | Issue | ISSN |
6 | 9 | 1751-8628 |
Citations | PageRank | References |
6 | 0.48 | 11 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Jinghan He | 1 | 14 | 7.47 |
| C. Xu | 2 | 80 | 13.87 |
| L. Li | 3 | 6 | 0.48 |