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signal     
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  信号
    Researches on the Detection of Weak Targets by Signal Integration
    微弱目标信号积累检测的方法研究
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    Research on and Applications of Adaptive Signal Detection Techniques for High Frequency Channels
    高频信道自适应信号检测技术的研究及应用
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    Study on Fractal Method for Radar Signal Detection
    雷达信号检测的分形方法研究
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    Study on the Theory of Multifrequency Signal Detection and its Application in Digital Measurement of Waveform Parameters
    基于现代DSP技术的多频信号测量理论研究及其在数字波形参数测量中的应用
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    Joint Estimation Technique of Array signal parameters
    阵列信号多参量联合估计技术研究
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  信号的
    Study on Approaches of DS&DS/CDMA Signal Estimation
    DS及DS/CDMA信号的估计方法研究
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    Research on Some Perfect Discrete Signal
    几类最佳离散信号的研究
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    Research on Separation of Signal Components of Multicomponent Signal
    多分量信号的信号分量分离技术研究
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    The Power Spectrum Analysis of a M-Channel ΔM PSK Signal and Its Application in the Determination of the Main Specifications of a Directional- Filter Duplexer
    M路增量调制移相信号的频谱分析及其在确定“定向滤波双工器”主要指标中的应用
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    Optimal Processing of Space-Time Radar Signal
    空时雷达信号的最优处理
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    A TIME-DOMAIN AVERAGE METHOD TREATING THE CASE OF LOWER SIGNAL TO NOISE RATIO FOR MODAL PARAMETER IDENTIFICATION
    低噪比情况下识别模态参数的时域平均方法
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    The Improvement of Signal to Noise Ratio of a FM Optical Transmitter by Electrical Feedback
    电反馈对FM光发射机噪比性能的改善
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    This paper introduces the principles of the wavelet transform,analyzes on the performance of using the wavelet transform to implement the weak signal detection,and illustrates that the wavelet transform can improve the SNR by using the simulated results.
    介绍了小波变换原理,对利用小波变换实现弱号检测的性能进行了分析,并利用仿真结果说明小波变换能提高噪比。
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    The simulated experiments of woisy images using ICA algorithms aften wiener de-noising are implemented and the PSNR(Peak Signal to Noise Ratio)is used to provide quantitative evaluations of the feasibility and efficiency of the method.
    应用上述算法,对有噪图像号进行仿真实验研究,通过比较降噪前后的峰值噪比(Peak Signal to Noise Ratio,PSNR),说明该算法的可行性和有效性.
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    The system presented here have measurement functions as follow:signal— noise to separate, measuring the power spectrum of conduction interference signal 、companion contain noise the conduction interference sig- nals wave and noise wave etc.
    经过号处理,该系统还具有噪分离、测量传导干扰功率谱、伴有噪声的原始振动波形和噪声波等测量功能。
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  信号处理
    Research and Application of Parallel Processing Technology in Radar Signal Processing
    并行处理技术在雷达信号处理中的应用研究
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    Robust Array Signal Processing Techniques and Their Applications
    稳健的阵列信号处理技术及其应用
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    The Development of High-Speed DSP Board and its Application in Real-time Signal Processing of Synthetic Aperture Radar System
    高速DSP板的开发及其在合成孔径雷达实时信号处理中的应用研究
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    Theory & Application of Adaptive Blind Signal Processing
    自适应盲信号处理理论及应用研究
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    Study on the Key Techniques of Signal Processing in PD Radar
    PD雷达信号处理若干关键技术研究
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      signal
    In the early 1960s research into radar signal synthesis produced important formulas describing the action of the two-dimensional Fourier transform on auto- and crossambiguity surfaces.
          
    It is shown that the one-dimensional sampling sets correspond to Bessel sequences of complex exponentials that are not Riesz bases for $L^2[-R,R].$ A signal processing application in which such sampling sets arise naturally is described in detail.
          
    Given a bandlimited signal, we consider the sampling of the signal and some of its derivatives in a periodic manner.
          
    We present a method for finding the dual frame and, thereby, a method for reconstructing the signal from its samples.
          
    We show that if no sampling of the signal itself is involved, the sampling is not stable and cannot be stabilized by oversampling.
          
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    This article introduces a new circuit of wide band square-wave generator, producing square-waves from 15 Hz to 1.2 MHz in seven steps, with rise time, of about 0.04 μs., the highest out put-signal level being13.5 v. peak to peak.Finally, some experimental examples of square-wave application are given.

    本文介绍一个矩形波发生器的新电路,可以产生七种不同频率(由15赫至1.2兆赫)的矩形电压,建立时间约0.04微秒,轮出的最大振幅达13.5伏。后面还提出一些应用矩形电压的实验范例。

    The output signal-to-noise ratio (snr) of correlation detectors is analized.A correla-tion detector is a divice, which consists of two input filters, one output filter and one multiplier, and has two input pairs of terminals and one output pair of terminals.Unlike that described in papers[1][[2][[3] and[3], effects of input filters are consid ered in this paper. The formulation concerning the relation between the input snr and the output snr are derived, and special working conditions of correlation detectors...

    The output signal-to-noise ratio (snr) of correlation detectors is analized.A correla-tion detector is a divice, which consists of two input filters, one output filter and one multiplier, and has two input pairs of terminals and one output pair of terminals.Unlike that described in papers[1][[2][[3] and[3], effects of input filters are consid ered in this paper. The formulation concerning the relation between the input snr and the output snr are derived, and special working conditions of correlation detectors are discussed.The conclusion is us follows: For small snr, the output snr is proportional to the products of two input snr; if the input snr of one channel is much lorger than the other and than 1, the output snr will be proportional to the smaller input snr; for all conditions (either strong signal, or weak signal) . the output snr of correlation detectors is comparable to the squar law detector's.

    本文分析讨论相关检波器的输出信号杂音比,所谓相关检波器是这样一种装置,它包含两个输入和一个输出并由两个输入滤波器、一个输出滤波器和一个乘积器组成。和以前有过的讨论不同,文中考虑到了输入及输出滤波器的影响,导出了输入及输出信号杂音比关系的公式,讨论了相关检波器的几种特殊工作形式。结果指出,在小输入信号杂音比情况下,输出信号杂音比和两路输入信号杂音比的乘积成正比;在一路输入为大信号(相对于杂音)的情况下,输出信号杂音比和另一路输入信号杂音比成正比;无论在大信号或小信号输入情况下,相关检波器的输出信号杂音比与同样情况下平方检波器的输出信号杂音比是同量级的。

    The paper deals with the problem of the detection and the estimation of parameters of radar signals in the Gaussian white noise from the point of view of the theory of statistical decision. The design principle of the optimum radar receiver for signals of unknown parameters is given according to the characteristics of the high-speed target at distance and to the purposes of radar systems. Unified detection procedures are established the construction and the performances of the optimum radar receivers...

    The paper deals with the problem of the detection and the estimation of parameters of radar signals in the Gaussian white noise from the point of view of the theory of statistical decision. The design principle of the optimum radar receiver for signals of unknown parameters is given according to the characteristics of the high-speed target at distance and to the purposes of radar systems. Unified detection procedures are established the construction and the performances of the optimum radar receivers are obtained.The block diagrams of these results are also shown.Emphasis is given to the case where the prior distributions are unknown, while only two parameters, velocity and distance, are discussed for the case where the prior distributions "re known. For the latter case, the optimum estimations of these two parameters and their properties are derived from the absolute loss criterion.

    本文以统计判决理论观点考虑淹没于正态白噪声中雷达信号检测和参数估计问题。根据远距离高速目标的性质及雷达系统的目的,指出未知参数信号最佳雷达接收机的设计原则。建立了统一的检测程序,得出最佳雷达接收机的结构及其性能。也附有这些结果相应的方框图。 着重于论述信号参数先验分布未知的情形,对于先验分布已知的情形,只讨论了目标速度和距离两个参数。在后种情形,以绝对损失标准导出达两个参数的最佳估计程序和它们的性质。

     
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