| 基于小波去噪的协作空闲频谱检测性能 |
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| 引用本文： | 曾文娟,谢显中. 基于小波去噪的协作空闲频谱检测性能[J]. 吉林大学学报(信息科学版), 2010, 28(5): 433-438. DOI: 10.3969/j.issn.1671-5896.2010.05.001 |
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| 作者姓名： | 曾文娟 谢显中 |
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| 作者单位： | 重庆邮电大学,个人通信研究所,重庆,400065;重庆邮电大学,个人通信研究所,重庆,400065 |
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| 基金项目： | 国家自然科学基金资助项目，重庆市自然科学基金资助项目，重庆市教委应用基础研究基金资助项目 |
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| 摘 要： | 为解决低信噪比(SNR:Signal to Noise Ratio)时引起检测性能突变的问题，分析了能量检测在不同SNR下的检测效果,在进行频谱检测前先对信号进行去噪处理,以改善能量检测在低SNR下的检测性能。在此基础上,将改进的能量检测算法应用到协作空闲频谱检测中,保证各个CR(Cognitive Radio)节点检测性能有一定的可靠性,从而改善协作检测的检测效果。仿真结果表明,对经过小波信号处理后的各节点的检测结果进行融合协作,与以往的协作检测方案相比,ROC（Receive Operating Characteristic）曲线有了明显改善。
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| 关 键 词： | 感知无线电 空闲频谱检测 能量检测 小波去噪 协作空闲频谱检测 |
Performance of Cooperative Spectrum Sensing Based on Wavelet Transform for Cognitive Radio |
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| ZENG Wen-juan,XIE Xian-zhong. Performance of Cooperative Spectrum Sensing Based on Wavelet Transform for Cognitive Radio[J]. Journal of Jilin University:Information Sci Ed, 2010, 28(5): 433-438. DOI: 10.3969/j.issn.1671-5896.2010.05.001 |
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| Authors: | ZENG Wen-juan XIE Xian-zhong |
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| Affiliation: | Institute of Personal Communication, Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
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| Abstract: | Idle spectrum sensing is the key that cognitive radio can be implemented. Energy detection is frequently applied as a idle spectrum sensing technology for easy principle and easy implement. However,the detection performance may have abrupt change in the bad external communication environment ( SNR: Signal to Noise Ratio is low) . Firstly this paper analyzed the performances of energy detection under different SNRs,and then denoised the signal before spectrum sensing improving the performances of detection u... |
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| Keywords: | cognitive radio idle spectrum sensing energy detection wavelet denoise cooperate idle spectrum sensing |
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