Sensing‐throughput tradeoff for cooperative multiple‐input single‐output cognitive radio |
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| Authors: | Xin Liu Qingfeng Jing Yun Jia Weizhi Zhong Yong Liang Guan |
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| Affiliation: | 1. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, China;2. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore;3. Communication Research Center, Harbin Institute of Technology, Harbin, China |
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| Abstract: | In this paper, we propose a new cooperative multiple‐input single‐output (MISO) cognitive radio (CR) system, which can use some of the antennas to transmit its data and the others to help to transmit the data of the primary user (PU) by performing cooperative communication if the presence of the PU is detected through the cooperative spectrum sensing. A new cooperative sensing‐throughput tradeoff model is proposed, which maximizes the aggregate rate of the CR by jointly optimizing sensing time and spatial sub‐channel power, subject to the constraints of the aggregate rate of the PU, the false alarm and detection probabilities, the aggregate interference to the PU and the aggregate power of the CR. Simulation results show that compared with the conventional scheme, the proposed cooperative scheme can achieve the larger aggregate rate of the CR, while keeping the aggregate rate of the PU invariable with the increasing of the interference. Copyright © 2013 John Wiley & Sons, Ltd. |
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| Keywords: | cognitive radio cooperative spectrum sensing cooperative communication MISO joint optimization |
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