For the application of wireless sensor networks in the military field, one of the main challenges is security. To solve the problem of verifying the location claim for a node, a new location verifica- tion algorithm c...For the application of wireless sensor networks in the military field, one of the main challenges is security. To solve the problem of verifying the location claim for a node, a new location verifica- tion algorithm called node cooperation based location secure verification （NCBLSV） algorithm is proposed. NCBLSV could verify malicious nodes by contrasting neighbor nodes and nodes under beam width angle using an adaptive array antenna at a base point. Simulation experiments are con- ducted to evaluate the performance of this algorithm by varying the communication range and the an- tenna beam width angle. Results show that NCBLSV algorithm has high probability of successful ma- licious nodes detection and low probability of false nodes detection. Thus, it is proved that the NCBLSV algorithm is useful and necessary in the wireless sensor networks security.展开更多
Using the Method of Moments(MoM) and the spectral method, the effect of mutual coupling on the performance of adaptive arrays is compensated. First, the MoM is used to compute the behavior of the array, where the accu...Using the Method of Moments(MoM) and the spectral method, the effect of mutual coupling on the performance of adaptive arrays is compensated. First, the MoM is used to compute the behavior of the array, where the accurate analytical model and odd numbers of piecewise sinusoids are applied. Then the covariance matrix with mutual coupling being taken into account is analyzed, and the expression for the weight of the Least Mean Square(LMS) algorithm with mutual coupling being compensated is given. Finally, the method given in this letter is tested on an example.展开更多
This paper presented a novel semi blind adaptive beamforming algorithm specially designed for wideband coherent CDMA mobile communication systems with multiplexd control and data channels. The presented algorithm uses...This paper presented a novel semi blind adaptive beamforming algorithm specially designed for wideband coherent CDMA mobile communication systems with multiplexd control and data channels. The presented algorithm uses a parallel structure to exploit not only the desired user’s pseudo noise sequence but also the information from multiplexed pilot and data symbols, thus help achieve faster convergence and lower bit error rate. Monte Carlo simulation results verified the performance improvement in terms of BER.展开更多
Y2000-62593 01038712000年 IEEE 相控阵系统和技术国际会议录=2000IEEE international conference on phased array systems &technology[会,英]/IEEE Antennas and Propagation So-ciety.—IEEE,2000.—565P.(HC)本次会议于2000年...Y2000-62593 01038712000年 IEEE 相控阵系统和技术国际会议录=2000IEEE international conference on phased array systems &technology[会,英]/IEEE Antennas and Propagation So-ciety.—IEEE,2000.—565P.(HC)本次会议于2000年5月21～25日在美国加利福尼亚州 Dana Point 市召开,会上发表121篇文章分16部分编辑出版,内容有:相控阵综述及其发展,微型组件和元件,移动通信用相控阵,日本相控阵发展,数字波束成形,波束方向确定,卫星通信用相控阵,微带线和保角阵天线,有源阵,光子学阵应用,宽带相控阵和时域方法,系统设计和最佳化,相控阵测量和校准及自适应阵天线。展开更多
基金Supported by the National High Technology Research and Development Programme of China （ No. 2004AA001210） and the National Natural Science Foundation of China （No. 60532030）.
文摘For the application of wireless sensor networks in the military field, one of the main challenges is security. To solve the problem of verifying the location claim for a node, a new location verifica- tion algorithm called node cooperation based location secure verification （NCBLSV） algorithm is proposed. NCBLSV could verify malicious nodes by contrasting neighbor nodes and nodes under beam width angle using an adaptive array antenna at a base point. Simulation experiments are con- ducted to evaluate the performance of this algorithm by varying the communication range and the an- tenna beam width angle. Results show that NCBLSV algorithm has high probability of successful ma- licious nodes detection and low probability of false nodes detection. Thus, it is proved that the NCBLSV algorithm is useful and necessary in the wireless sensor networks security.
文摘Using the Method of Moments(MoM) and the spectral method, the effect of mutual coupling on the performance of adaptive arrays is compensated. First, the MoM is used to compute the behavior of the array, where the accurate analytical model and odd numbers of piecewise sinusoids are applied. Then the covariance matrix with mutual coupling being taken into account is analyzed, and the expression for the weight of the Least Mean Square(LMS) algorithm with mutual coupling being compensated is given. Finally, the method given in this letter is tested on an example.
文摘This paper presented a novel semi blind adaptive beamforming algorithm specially designed for wideband coherent CDMA mobile communication systems with multiplexd control and data channels. The presented algorithm uses a parallel structure to exploit not only the desired user’s pseudo noise sequence but also the information from multiplexed pilot and data symbols, thus help achieve faster convergence and lower bit error rate. Monte Carlo simulation results verified the performance improvement in terms of BER.
文摘Y2000-62593 01038712000年 IEEE 相控阵系统和技术国际会议录=2000IEEE international conference on phased array systems &technology[会,英]/IEEE Antennas and Propagation So-ciety.—IEEE,2000.—565P.(HC)本次会议于2000年5月21～25日在美国加利福尼亚州 Dana Point 市召开,会上发表121篇文章分16部分编辑出版,内容有:相控阵综述及其发展,微型组件和元件,移动通信用相控阵,日本相控阵发展,数字波束成形,波束方向确定,卫星通信用相控阵,微带线和保角阵天线,有源阵,光子学阵应用,宽带相控阵和时域方法,系统设计和最佳化,相控阵测量和校准及自适应阵天线。
