小波变换技术具有很强的信号分离能力容易把随机噪声从信号中分离出来，从而提高信号的信噪比。
Wavelet Transfer (WT) is a powerful technique in signal separation. It is very easy for WT to improve the signal-to-noise (SNR) by separating the random noise and useful signal.
基于频谱特征的语音激活检测方法易于实现，计算量小且准确率高，适合较高信噪比的实时数字通信网络中。
Our voice activity detection method is simple to be implemented and calculated and has high accuracy, which can work in the real time digital communication network with better signal-noise-ratio.
低信噪比小目标检测是当前的研究热点，能量积累是其关键技术之一。
Low SNR point target detection is the currently research focus, energy accumulation is one of its key elements.
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