以下为句子列表：
英文: A new wavelet-bispectrum united detection algorithm is proposed to face with problems such as the complex structure and low signal to noise ratio of radar echo, when there exist difficulties in detecting impulses in through-wall radar systems.
中文: 摘要针对冲击体制穿墙雷达系统中回波信号结构复杂、信噪比低、信号检测困难等问题，提出一种小波－双谱联合检测新算法。
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英文: Abstract: The threshold algorithm of the target detection is often used to detect target echo signals.Its performance is based on signals-noise ratio.When signals-noise ratio is great than 6.7,the target can be detected.In order to increase the signals-no
中文: 文摘:目标检测的阈值法经常用于检测目标的回波信号.它的性能取决于信噪比,当信噪比大于6.7时,能够检测出目标.为了提高信噪比,经常采用匹配滤波器.如果系统是窄带系统,噪声为色噪声,无法使用匹配滤波器,不能提高信噪比.激光回波信号的几何特征不同于噪声.提出了一种利用这种几何特征检测目标的算法.当信噪比大于2时,该算法能够检测出目标.该算法已经实际应用.
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英文: Actual seismic data procession shows the efficiency of this method to increase the signal-to-noise ratio of horizontal stacked profile, especially for inaverage signal-to-noise ratio in pre-stack trace assemblage data.
中文: 实际地震资料处理表明，这种方法能够有效地提高水平叠加剖面的信噪比，尤其对于叠前的共中心点道集资料中信噪比不均衡的情况，效果更好。
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英文: Experiments showed that the methods improved signal-to-noise ratio and testing sensitivity greatly, and met the requirement of real-time testing because of the simplicity of the signal processing program.
中文: 经实验验证，这些方法大大提高了检测信号的信噪比和装置的检测灵敏度，而且信号处理程序简单，满足实时检测的要求。
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英文: In order to improve Signal noise ratio (SNR), Wavelet Denoising is used, and the radar in-pulse characteristics is extracted by Wavelet-ridge, radar emitter signal sorting is realized by neural networks.
中文: 该方法首先对接收到的雷达信号进行小波去噪，达到提高信噪比的目的，然后利用小波脊线法准确提取其脉内特征参数，最后基于神经网络实现信号的分选。
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