Research Article
Spectrum Access Based on Energy Harvesting with Optimal Power Allocation
@INPROCEEDINGS{10.1007/978-3-319-66628-0_52, author={Jiaying Wu and Weidang Lu and Hong Peng and Xin Liu}, title={Spectrum Access Based on Energy Harvesting with Optimal Power Allocation}, proceedings={Communications and Networking. 11th EAI international Conference, ChinaCom 2016 Chongqing, China, September 24-26, 2016, Proceedings, Part II}, proceedings_a={CHINACOM}, year={2017}, month={10}, keywords={Energy harvesting Power allocation Spectrum access}, doi={10.1007/978-3-319-66628-0_52} }- Jiaying Wu
Weidang Lu
Hong Peng
Xin Liu
Year: 2017
Spectrum Access Based on Energy Harvesting with Optimal Power Allocation
CHINACOM
Springer
DOI: 10.1007/978-3-319-66628-0_52
Abstract
In this paper, we propose a spectrum access method based on energy harvesting with optimal power allocation. Specifically, in the first phase, the primary user broadcasts its signal. The cognitive user receives the primary signal, and splits the power into two parts, one is to decode information, another is to harvest energy. In the second phase, the cognitive user forwards the primary signal by using the power harvested in the first phase, whlich assists the primary user to achieve the target rate. The cognitive user can access the primary spectrum to transmit its own signal by using its own power as a reward. We study the optimal power allocation to maximize the cognitive achievable rate, meanwhile the target rate of the primary user is achieved. Simulation results indicate that the proposed method can improve the performances of both the primary and cognitive users.