HYBRID SPECTRUM SHARING WITH IMPERFECT SENSING IN FADING CHANNELS
Refereed conference paper presented and published in conference proceedings

香港中文大學研究人員

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摘要This paper considers the hybrid spectrum sharing paradigm where a cognitive radio system first performs spectrum sensing to identify primary users' (PU) status (idle/busy) and then adapts its transmit power according to sensing outcomes. To maximize ergodic throughput in fading environments, joint sensing and power allocation has to be considered. However, existing studies determine the optimal sensing time based on instantaneous channel state information (CSI) at each time slot, which imposes a stringent requirement in practice. In this paper, we obtained a statistical CSI-based optimal sensing time by exploring the ergodic rates of both overlay and underlay access in Rayleigh fading environments. Simulation results validate the derived analytic expressions, showing that significantly higher maximum throughput can be achieved by hybrid access compared with conventional overlay access.
著者Zhang YL, Ching PC, Zhang QY
會議名稱IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
會議開始日26.05.2013
會議完結日31.05.2013
會議地點Vancouver
會議國家/地區加拿大
詳細描述organized by IEEE Signal Processing Society,
出版年份2013
月份1
日期1
出版社IEEE
頁次5318 - 5322
電子國際標準書號978-1-4799-0356-6
國際標準期刊號1520-6149
語言英式英語
關鍵詞Cognitive radio; ergodic throughput; hybrid spectrum sharing; power allocation; spectrum sensing
Web of Science 學科類別Acoustics; Engineering; Engineering, Electrical & Electronic

上次更新時間 2020-30-10 於 23:43