Computer Networks: The International Journal of Computer and Telecommunications Networking
On the primary exclusive region of cognitive networks
IEEE Transactions on Wireless Communications
Optimal power allocation for cognitive radio under primary users outage loss constraint
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
WTS'10 Proceedings of the 9th conference on Wireless telecommunications symposium
IEEE Transactions on Wireless Communications
Power allocation with max-min fairness for cognitive radio networks
GMC '10 Proceedings of the 2010 Global Mobile Congress
Cognitive radio in a frequency-planned environment: some basic limits
IEEE Transactions on Wireless Communications - Part 1
Dynamic spectrum access in open spectrum wireless networks
IEEE Journal on Selected Areas in Communications
Power allocation in the TV white space under constraint on secondary system self-interference
Journal of Electrical and Computer Engineering
| Hi-index | 0.00 |
The key bottleneck for secondary spectrumusage is the aggregate interference to the primary system receivers due to simultaneous secondary transmissions. Existing power allocation algorithms for multiple secondary transmitters in the TV white space either fail to protect the TV service in all cases or they allocate extremely low power levels to some of the transmitters. In this paper, we propose a power allocation algorithm that favors equally the secondary transmitters and it is able to protect the TV service in all cases. When the number of secondary transmitters is high, the computational complexity of the proposed algorithm becomes high too. We show how the algorithm could be modified to reduce its computational complexity at the cost of negligible performance loss. The modified algorithm could permit a spectrum allocation database to allocate near optimal transmit power levels to tens of thousands of secondary transmitters in real time. In addition, we describe how the modified algorithm could be applied to allow decentralized power allocation for mobile secondary transmitters. In that case, the proposed algorithm outperforms the existing algorithms because it allows reducing the communication signalling overhead between mobile secondary transmitters and the spectrum allocation database.