Trading detection for resolution in active sonar receivers.
Trading detection for resolution in active sonar receivers.
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DOI：
10.1121/1.3614547
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发表时间：
2011-09
期刊：
影响因子：
--
通讯作者：
N. S. Sharma;J. Buck;J. Simmons
中科院分区：
文献类型：
--
作者：
N. S. Sharma;J. Buck;J. Simmons
本文提出了一种主动声纳接收机，提供了一个平稳的检测和分辨率之间的权衡。匹配滤波器是白色高斯噪声中已知信号的最佳检测器，但如果目标的时间间隔小于发射信号的自相关函数的主瓣宽度，则可能无法分辨目标。逆滤波器在没有噪声的情况下实现了多个目标的最佳分辨率性能，但在信号带宽之外放大了噪声，这使得它在许多现实场景中不切实际。所提出的主动声纳接收机，可变分辨率和检测接收机（VRDR）相结合的匹配和逆滤波器的属性，以实现检测和分辨率之间的平滑权衡。仿真接收机工作特性表明，对于一定范围的偶极子声纳目标，VRDR的性能优于匹配和逆滤波器，以及另一个以前提出的带限逆滤波器的上级。
This paper proposes an active sonar receivers that offers a smooth trade-off between detection and resolution. A matched filter is the optimal detector of known signals in white Gaussian noise but may fail to resolve the targets if the time separation of targets is less than the mainlobe width of the autocorrelation function of the transmitted signal. An inverse filter achieves optimal resolution performance for multiple targets in the absence of noise, but amplifies the noise outside the signal bandwidth in a manner that makes it impractical in many realistic scenarios. The proposed active sonar receiver, the variable resolution and detection receiver (VRDR) combines the matched and inverse filter properties to achieve a smooth trade-off between detection and resolution. Simulated receiver operating characteristics demonstrate that for a range of dipole sonar targets, the performance of the VRDR is superior to the matched and inverse filter, as well as another previously proposed bandlimited inverse filter.