混响背景下的CW信号检测

CW信号即单频矩形脉冲信号,是雷达及声纳中常用的信号形式.混响是主动声纳检测中主要的背景干扰,它是一种有色干扰噪声,并常被看作是一个非平稳的随机过程,这使得工作在白噪声条件下检测器的性能在一定程度上受到限制.关于混响背景下的CW信号的检测问题是人们一直关注的问题,通常人们将混响视为随机信号进行建模,而忽视它的混沌特性.将混响视为混沌噪声,利用混沌噪声背景下的信号检测方法来检测混响背景噪声下的CW信号,并通过仿真得到预期结果.

Detection of CW Signal in Reverberation Background

The CW signal is widely used in radar and sonar. Many people pay their attentions to the detection of the CW signal. In active sonar detection,reverberation is the dominant background interference. It is a colored disturbance noise and is always regarded as a non-stationary random process,which degrades the performance of the matched filter that is the optimum detector in white back- ground noise. The detection of CW signal in reverberation noise is a important problem. The reverberation usually is regard as stochastic signal,so its chaotic characteristics are been ignored. If take the reverberation as chaotic noise,it can use the detection method in chaotic noise to detect the CW signal in reverberation background. And the simulation results show a good agreement with theory.