基于广义似然比的双基地声纳在强直射冲击波多径传播下的检测
GLRT-based Detection in Bistatic Sonar under Strong Direct Blast with Multipath Propagation
摘要：
直达波是双基地声纳中的一种强干扰，由于爆炸波和信号的多径传播而难以抑制。本文提出了一种基于广义似然比检验（GLRT）的频域检测方法，在多径环境下，利用最大似然估计和加权傅里叶变换及松弛法对未知参数进行估计。从理论上给出了已知和未知噪声功率下检测器检验统计量的分布，并确定了检测概率。当噪声功率用最大似然估计进行估计时，检测器的性能降低了4 dB。仿真结果表明，在低信直比的前向散射探测配置下，该探测器是有效的。讨论了多种因素的敏感性，并实现了鲁棒性。
英文摘要：
Direct blast is a strong interference in bistatic sonar and difficult to suppress due to multipath propagation for blasts and signals. A generalized likelihood ratio test (GLRT) based detection scheme in the frequency domain of the received signals is proposed in this study, and the unknown parameters are estimated using Maximum Likelihood Estimates and Weighted Fourier Transform and Relaxation in a multipath environment. The distributions of the test statistic of detectors for known and unknown noise power are given in theory, and the detection probability is determined. The performance of the detector decreases by 4 dB when the noise power is evaluated with maximum likelihood estimates. Simulations show the effectiveness of the detector under a forward scattering detection configuration with a low signal-to-direct blast ratio. The sensitivity of many factors is discussed, and robustness is achieved.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
