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压缩感知测量方法的机密性

Secrecy of Compressed Sensing Measurements
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摘要 分析了压缩感知(CS)的安全性问题,讨论了在攻击者不知道测量矩阵情况下是否可以有效对信号进行重构的问题,论证了压缩感知可以达到保密性但达不到完善的保密性。最后联合信道容量和速率失真函数,讨论了压缩感知恢复信号所需测量数据量的下限,并分析了测量噪声对信号重构性能的影响。 The security of compressed sensing(CS) is analysed. Wheather the attacker can effectively recover signal when it does not know measurement matrix is discussed. The CS can achieve the confidentiality but is fail to achieve the perfect secrecy. The lower bound of measure number for the signal recovery of CS is discussed by combining channel capacity with rate-distortion function. The influence of measurement noise on the signal reconstruction performance limitation is also analysed.
作者 王超 梁大鹏
出处 《电讯技术》 北大核心 2010年第11期26-29,共4页 Telecommunication Engineering
基金 国家高技术研究发展计划(863计划)项目(2009AA01z209) 国家自然科学基金资助项目(60902042) 北京市自然科学基金资助项目(4082020)~~
关键词 压缩感知 测量矩阵 机密性 信道容量 率失真函数 compressed sensing(CS) measurement matrix privacy channel capacity rate-distortion function
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