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| 1 | Two adaptive detectors for range-spread targets in non-Gaussian clutter显示文摘This paper addresses adaptive detection of range-spread target in spherically invariant random vector clutter. Based on the nonadaptive detectors of NSDD-GLRT and SDD-GLRT, two adaptive detectors named ANSDD-GLRT and ASDD-GLRT are devised by replacing the unknown normalized clutter covariance matrix with the sample covariance matrix based on the secondary data. The formulas of detection probability and false alarm probability are deduced. Moreover, the constant false alarm rate properties of both adaptive detectors are assessed and the inffuence of mismatched steering vector on detection probability is analyzed. The experimental results show that the adaptive detectors have an acceptable loss with respect to the nonadaptive counterparts. Furthermore, the ANSDD-GLRT converges much faster than the ASDD-GLRT, however, the latter rejects the misaligned signals more effectively. Both detectors perform well for the uniformly-distributedenergy target, but degenerate for the fluctuating targets. In addition, the correlation between target scatterers results in an additional gain for low signal-to-clutter power ratio. | HE You JIAN Tao SU Feng PING DianFa | 2011 | Science China(Information Sciences)2011，54，2： | 10 |
| 2 | 复合高斯杂波下距离扩展目标的OM-GLRT显示文摘广义似然比检测(Generalized Likelihood Ratio Test,GLRT)是解决复合高斯杂波下距离扩展目标检测问题的一种有效方法,而当目标速度未知时,对于毫米波等高频雷达而言,速度估计误差将造成方向矢量(steering vector)失配,从而导致GLRT性能的严重下降。此时,如何设计最佳的GLRT检测器就成为一个优化问题。本文在分析方向矢量失配对GL- RT影响的基础上提出了一种最优匹配GLRT(Optimum Matched GLRT,OM-GLRT)方法。仿真结果表明,OM-GLRT能有效地实现对速度未知目标的检测。 | 陈远征 范红旗 付强 | 2008 | 信号处理2008，24，5： | 6 |
| 3 | Multichannel radar adaptive signal detection in interference and structure nonhomogeneity显示文摘In this paper, we consider the problem of multichannel radar signal detection in interference and structure nonhomogeneity. The interference is often caused by electromagnetic countermeasure(ECM) systems or industrial activity, while the nonhomogeneity usually arises because of rapid variations in terrain or radar antenna structure. We propose three adaptive detectors according to three common criteria of detector design, namely, the generalized likelihood ratio test(GLRT), Rao test, and Wald test. Extensive performance comparisons are conducted under different scenarios. It is shown that when the nonhomogeneity is severe, the detector devised according to the GLRT achieves the best detection performance. In other scenarios, the detector designed according to the Wald test may be the best choice, which has the highest probability of detection. | Weijian LIU Hui HAN Jun LIU Hongli LI Kai LI Yong-Liang WANG | 2017 | Science China(Information Sciences)2017，60，11： | 6 |
| 4 | Adaptive detectors in the Krylov subspace显示文摘The validity of the application of the Krylov subspace techniques in adaptive filtering and detection is investigated. A new verification of the equivalence of two well-known methods in the Krylov subspace, namely the multistage Wiener filters(MWF) and the auxiliary-vector filtering(AVF), is given in this paper. The MWF and AVF are incorporated into two well-known detectors, namely, the adaptive matched filter(AMF) and Kelly's generalized likelihood ratio test(GLRT) including their diagonally loaded versions, which form new detectors.Compared to the conventional AMF, GLRT, and their diagonally loaded versions as well as the reduced-rank AMF and GLRT, the probabilities of detection(PDs) of the new detectors are improved especially when the sample support is low. More importantly, the new detectors are robust of the rank selection of the clutter subspace compared to the reduced-rank AMF and GLRT. These new detectors all possess asymptotic constant false alarm rate(CFAR) property. | LIU WeiJian XIE WenChong LI RongFeng WANG ZeTao WANG YongLiang | 2014 | Science China(Information Sciences)2014，57，10： | 5 |
| 5 | Adaptive detection for distributed targets in Gaussian noise with Rao and Wald tests显示文摘The problem of adaptively detecting a range distributed target or targets in Gaussian interference is considered in this paper.It is assumed that a set of secondary data is available.Firstly,we derive the adaptive Rao and Wald tests with one-step detection algorithm,and find that both of them are of the same asymptotic performance as the GLRT one.Secondly,the Rao and Wald tests are derived by resorting to the two-step design strategy.To our surprise,our derivations show that all the Rao,Wald and GLR tests in the two-step design strategy are equivalent.Thirdly,the property assessments are presented.It is shown that these new detectors guarantee CFAR property with respect to the Gaussian noise.Finally,simulation results show that these results are accurate. | SHUAI XiaoFei KONG LingJiang YANG JianYu | 2012 | Science China(Information Sciences)2012，55，6： | 5 |
| 6 | Impact of Channel Correlation on Performance of Unitary Space-Time Codes显示文摘 | GUO Yongliang YOU Xiaohu | 2011 | Chinese Journal of Electronics2011，20，3： | 2 |
| 7 | ISI信道调制分类技术评估显示文摘带限信道及ISI对数字调制信号的调制分类有着严重的不利影响 .针对非ISI信道环境的qLLR的调制分类器对ISI信道的BPSK/QPSK调制分类仍然有效 .GLRT调制分类器是以GLRT为基本途径 ,借助Viterbi极大似然译码算法估计调制码符号序列 ,并用PSP估计信道ISI的影响 .改进的鲁棒Viterbi算法能进一步抑制ISI的影响 .蒙特卡罗仿真表明 。 | 罗利春 | 2003 | 电子学报2003，31，7： | 2 |
| 8 | Adaptive detector design of MIMO radar with unknown covariance matrix显示文摘The problem of detecting signal with multiple input mul-tiple output (MIMO) radar in correlated Gaussian clutter dominated scenario with unknown covariance matrix is dealt with. The gen-eral MIMO model, with widely separated sub-arrays and co-located antennas at each sub-array, is adopted. Firstly, the generalized likelihood ratio test (GLRT) with known covariance matrix is ob-tained, and then the Rao and Wald detectors are devised, which have proved that the Rao and Wald test coincide with GLRT detec-tor. To make the detectors fully adaptive, the secondary data with signal-free will be collected to estimate the covariance. The per-formance of the proposed detector is analyzed, however, it is just ancillary. A thorough performance assessment by several numer-ical examples is also given, which has considered the sense with co-located antennas configure of transmitters and receivers array. The results show that the performance the proposed adaptive de-tector is better than LJ-GLRT, and the loss can be acceptable in comparison to their non-adaptive counterparts. | Lingjiang Kong Guolong Cui Xiaobo Yang Jianyu Yang | 2010 | Journal of Systems Engineering and Electronics2010，21，6： | 1 |
| 9 | 基于自适应预白化的水下动目标LFM回波联合检测显示文摘有色混响噪声背景以及水下动目标径向速度造成的回波和样本失配导致匹配滤波器对于线性调频LFM(linear frequency modulation)回波检测性能下降。基于自适应预白化处理的广义似然比GLRT(generalized likelihood ratio test)方法利用混响噪声背景的自回归AR(autoregressive)模型构建白化滤波器来抑制混响噪声,但回波和混响噪声的混叠会造成AR模型偏差。结合匹配滤波的回波定位特性和基于自适应预白化处理GLRT方法的混响噪声背景抑制特性,提出结合这两种方法的联合检测算法。仿真和实验数据测试表明联合检测算法对于水下动目标LFM回波检测性能优于单纯的零速样本匹配滤波和GLRT方法。 | 陈鹏 侯朝焕 马晓川 梁亦慧 | 2007 | 系统工程与电子技术2007，29，11： | 1 |
| 10 | 一种ARMA过程均值变化点的广义似然比检验显示文摘对ARMA过程均值变点检测的广义似然比检验GeneralizedLikelihoodRatioTest(GLRT)方法进行改进.改进的GLRT(IGLRT)方法考虑到,即使变点后的开始1(2,3,…)个残差均值的实现不符合故障特征,但后面的实现较符合故障特征,也有一定的把握认为变点已发生.模拟比较了GLRT和改进的GLRT的平均运行长度.最后,在已知一定先验分布的情形下,给出了GLRT的贝叶斯方法. | 刘次华 王雪 | 2005 | 华中科技大学学报(自然科学版)2005，33，5： | 1 |
| 11 | Improved AR-Based GLRT Detector for Range-Spread Targets in Compound-Gaussian Clutter without Secondary Data显示文摘The problem of adaptive radar detection in compound-Gaussian clutter without secondary data is considered in this paper.In most practical applications,the number of training data is limited.To overcome the lack of training data,an autoregressive(AR)-process-based covariance matrix estimator is proposed.Then,with the estimated covariance matrix the one-step generalized likelihood ratio test(GLRT) detector is designed without training data.Finally,detection performance of our proposed detector is assessed. | Xiao-Fei Shuai Ling-Jiang Kong Jian-Yu Yang | 2011 | Journal of Electronic Science and Technology2011，9，2： | 1 |
| 12 | Non-reconstruction compressive detector for wideband spectrum sensing based on GLRT显示文摘Spectrum sensing is an essential ability to detect spectral holes in cognitive radio( CR) networks. The critical challenge to spectrum sensing in the wideband frequency range is how to sense quickly and accurately. Compressive sensing( CS) theory can be employed to detect signals from a small set of non-adaptive,linear measurements without fully recovering the signal. However,the existing compressive detectors can only detect some known deterministic signals and it is not suitable for the time-varying amplitude signal,such as spectrum sensing signals in CR networks. First,a model of signal detect is proposed by utilizing compressive sampling without signal recovery,and then the generalized likelihood ratio test( GLRT) detection algorithm of the time-varying amplitude signal is derived in detail. Finally, the theoretical detection performance bound and the computation complexity are analyzed. The comparison between the theory and simulation results of signal detection performance over Rayleigh and Rician channel demonstrates the validity of the performance bound. Compared with the reconstructed spectrum sensing detection algorithm,the proposed algorithm greatly reduces the data volume and algorithm complexity for the signal with random amplitudes. | Song Xiaoqin Jin Hui Tan Yazhu Hu Jing Song Tiecheng | 2018 | The Journal of China Universities of Posts and Telecommunications2018，25，4： | 0 |
| 13 | 一种广义似然比恒虚警检测方法显示文摘文章在假设信号参数和噪声统计特性未知的情况下,介绍了一种广义似然比恒虚警检测方法,并对其检测性能进行了分析。最后进行仿真实验,结果表明,这种检测方法具有较好的检测性能。 | 周传山 蒋贤芬 | 2011 | 舰船电子工程2011，31，4： | 0 |
| 14 | Kernel-Based Subpixel Target Detection for Hyperspectral Images显示文摘 | GU Yanfeng LIU Ying ZHANG Ye | 2007 | Chinese Journal of Electronics2007，16，3： | 0 |
| 15 | 部分均匀环境中训练样本不足时的贝叶斯子空间检测器显示文摘为了解决部分均匀环境中训练数据不足时的子空间信号检测难题,采用贝叶斯理论,将噪声协方差矩阵建模为逆威沙特分布,并采用广义似然比准则(generalized likelihood ratio test,GLRT)、Rao准则和Wald准则设计自适应检测器,结果表明3种准则得到相同的结果。基于仿真及实测数据验证了所提检测器的有效性,并得出了影响检测性能的关键物理量。 | 周喆 刘维建 吴云韬 郑岱堃 巩朋成 | 2024 | 信息对抗技术2024，3，2： | 0 |
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