对信号长度不敏感的瞬态信号检测方法

针对检测未知长度瞬态信号时累积和方法性能下降的问题，提出对瞬态信号长度不敏感的累积和检测方法.首先建立信号长度失配累积和方法检测模型，然后比较了该方法和常规累积和方法在长度匹配和失配情况下的理论和仿真检测性能，并利用海试单通道波束形成后数据对两种方法进行了比较.结果表明，本文所述方法对未知长度瞬态信号检测性能稳定，且优于长度失配时的常规累积和方法.

A Transient Detection Method Independent of Unknown Signal Length

The performance of the Page Test decreases without the exact knowledge of the transient signal length.A new method independent of the signal length is proposed in this paper.The detector of unmatched signal length of the Page Test is modeled at first.Then the theoretical detection performance and the simulative one of the new method are compared to the general Page Test while detecting the unknown length transient signal.The experiment data on the sea of certain bearing channel after beamforming are exploited to compare these two methods.The result shows that the performance of the method proposed in this paper is more stable than the general Page Test without the exact knowledge of the transient signal length.