| 异构无线网络中基于多用户分集的协作频谱感知算法 |
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| 引用本文： | 李屹,纪红.异构无线网络中基于多用户分集的协作频谱感知算法[J].高技术通讯,2009,19(7). |
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| 作者姓名： | 李屹 纪红 |
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| 作者单位： | 北京邮电大学泛网无线通信教育部重点实验室,北京,100876 |
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| 基金项目： | 863计划，国家自然科学基金重点项目 |
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| 摘 要： | 研究了协作通信与认知无线电的结合,针对TD-SCDMA系统和WiMAX系统组成的异构无线网络,提出了一种基于多用户分集的协作频谱感知机制.根据该算法,WiMAX用户被分成若干个簇,选择每个簇内瞬时信道条件最好的WiMAX用户协作检测频谱,并利用软硬结合的判决手段,既保证检测性能,又不增加复杂度.分析和仿真表明,该算法一方面保证了频谱检测的可靠性,降低了虚警概率,另一方面减少了通信开销,提高了判决消息传输的可靠性,达到了提升频谱利用率的目的.
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| 关 键 词： | 认知无线电(CR) 协作频谱感知 多用户分集 异构无线网络 |
Multi-user diversity for cooperative spectrum sensing in heterogeneous wireless networks |
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| Li Yi,Ji Hong.Multi-user diversity for cooperative spectrum sensing in heterogeneous wireless networks[J].High Technology Letters,2009,19(7). |
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| Authors: | Li Yi Ji Hong |
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| Affiliation: | Li Yi Ji Hong (Key Laboratory of Universal Wireless Communications,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876) |
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| Abstract: | In order to achieve spectrum sharing in the heterogeneous wireless environment consisting of TD-SCDMA system and WiMAX system,a robust cooperative spectrum sensing scheme based on multi-user diversity is proposed.According to the scheme,the WiMAX users are separated into a few clusters and the most favorable user is selected in each cluster to detect spectrum.A softened hard decision scheme is used to achieve a good tradeoff between the detection performance and the complexity .The analytical and simulation... |
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| Keywords: | cognitive radio (CR) cooperation spectrum sensing multi-user diversity heterogeneous wireless networks |
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