Performance limits of a large passive array

P. A. Delaney
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Abstract

The objective of this research is to determine the relative performance levels of several different detectors when the transmitted signal is propagated through the ocean and received by a large, passive array. The transmitted signal is narrowband with a Rayleigh envelope and known carrier frequency while the received signal is calculated by modeling the ocean as a waveguide with a realistic sound velocity profile. The contaminating noise is modeled as temporally independent and spatially dependent non-Gaussian noise. It is shown that the optimal Bayes detector and the locally optimal Bayes detector have similar performance levels if the received signal-to-noise ratio (SNR) is small enough. When the SNR becomes large, the performance levels of the two detectors are substantially different for small probabilities of error.<>
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大型无源阵列的性能限制
本研究的目的是确定当发射信号通过海洋传播并由大型无源阵列接收时,几种不同探测器的相对性能水平。发射信号是窄带的瑞利包络和已知的载波频率,而接收信号是通过将海洋建模为具有真实声速剖面的波导来计算的。将污染噪声建模为时间无关和空间相关的非高斯噪声。结果表明,当接收到的信噪比足够小时,最优贝叶斯检测器与局部最优贝叶斯检测器具有相似的性能水平。当信噪比变大时,对于较小的误差概率,两种检测器的性能水平存在本质差异。
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