Fault-tolerant and energy efficient cross-layer design for wireless sensor networks
International Journal of Sensor Networks
International Journal of Sensor Networks
Reliable and energy-efficient routing protocol in dense wireless sensor networks
International Journal of Sensor Networks
IEEE Transactions on Wireless Communications
Power, sensing time, and throughput tradeoffs in cognitive radio systems: a cross-layer approach
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Maximum channel throughput via cooperative spectrum sensing in cognitive radio networks
IEEE Transactions on Wireless Communications
Latency-aware and energy efficiency tradeoffs for wireless sensor networks
International Journal of Sensor Networks
Energy-efficient detection of intermittent interference in wireless sensor networks
International Journal of Sensor Networks
The optimization of sensing-throughput in cognitive UWB networks
CAR'10 Proceedings of the 2nd international Asia conference on Informatics in control, automation and robotics - Volume 3
Adaptive resource allocation in multiuser cooperative networks with proportional rate constraints
International Journal of Sensor Networks
Optimal and Suboptimal Power Allocation Schemes for OFDM-based Cognitive Radio Systems
IEEE Transactions on Wireless Communications - Part 2
Hi-index | 0.00 |
One of the biggest challenges in cognitive radio CR network is to maximise the throughput of the secondary user while keeping the interference to the primary under the interference threshold. Efficient spectrum sensing along with transmit power control can achieve this conflicting goal. In this paper, we propose a sensor network aided cognitive radio system which will reduce the missed detection and reduce the interference. We investigate the performance of various sensing and power allocation schemes for an OFDM-based cognitive radio system. We formulate an optimisation problem to design the optimal sensing time and transmit power. Mathematical analysis shows that interference between primary and secondary in OFDM-based system depends on spectral distance. Results show that distance dependent modified water filling DDMWF scheme can achieve the highest data rate for the cognitive radio based secondary user and then the optimal sensing time can be designed to maximise the throughput.