Department of Electrical and Computer Engineering, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, USA.
J Acoust Soc Am. 2011 Sep;130(3):1272-81. doi: 10.1121/1.3614547.
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.
本文提出了一种主动声纳接收机，在检测和分辨率之间提供了一种平滑的折衷。匹配滤波器是在白高斯噪声中检测已知信号的最优检测器，但如果目标的时间间隔小于发射信号自相关函数的主瓣宽度，则可能无法分辨目标。在没有噪声的情况下，逆滤波器可以实现多个目标的最佳分辨率性能，但它会放大信号带宽外的噪声，使得在许多实际情况下都不实用。所提出的主动声纳接收机，可变分辨率和检测接收机（VRDR）结合了匹配滤波器和逆滤波器的特性，在检测和分辨率之间实现了平滑的折衷。仿真接收机工作特性表明，对于一系列偶极子声纳目标，VRDR 的性能优于匹配滤波器和逆滤波器，以及另一种以前提出的带限逆滤波器。
