本发明涉及一种对周期信号检测的方法和适配装置，尤其对于周期信号中同时存在强信号与弱信号的检测。
The invention relates to a method and adaptation device for detecting periodic signal, in particular to the periodic signal in which strong signal and weak signal exist at the same time.
运用周期和非周期弱信号的检测实例，进一步证明了该方法的有效性和实用性。
And it is further proved that the technique is effective and practical by means of the examples of the extraction of periodic and aperiodic signals.
本文研究了直扩信号的检测和参数估计两方面内容，参数估计使用了循环周期图谱估计方法。
The detection and parameter estimation of DS signal are studied in this paper. Cyclic period chart spectrum estimation is used on parameter estimation.
该方法可应用到设备内部自测试中，并可完成周期信号的在线故障检测。
This method can be applied to the built in self test of equipment and accomplish on line fault detection of period signals.
同时提出相关法与周期谱估计相结合的方法，并证明该方法可进一步改善信号的检测能力。
In the meantime the correlation algorithm is combined with periodic spectral estimation, and a further improvement of the signal detection ability using this method is proved.
实践证明了，倒频谱在检测周期信号和识别边频上具有独特的功能。
The special functions of cepstrum in testing cycle signal and side-band identification were fully proved by application.
本文给出了直接序列扩频信号正交分路周期相关检测算法的性能分析。
The performance analysis of quadrature correlation detection algorithm for DS-SS signal is presented.
因此本文提出了通过检测混沌振子阵列的间歇混沌周期来检测微弱信号的新方法。
Therefore, the detected signal can be gained by detecting the intermittent chaotic periodicity of chaotic oscillator.
反映滚动轴承故障的特征周期信号处于较低频带内，容易被噪声淹没，难以检测。
The fault characteristic periodic signals of the rolling bearing are in low frequency band and often buried in the noise.
基于混沌理论构建的信号检测系统具有敏感微弱周期信号和对噪声有强免疫力的特点，用于微弱信号检测领域优势明显。
Signal detection system based on chaos theory has the critical sensitivity to periodic signal and the immunity to the strong noise, which can be used in weak signal detection area.
仿真结果表明，周期斜率方差检测器是一种恒虚警概率检测器，在较低信噪比下可有效检测双曲调频信号，并对多普勒失配有很好的适配性。
The simulation result shows that VPSD is a kind of constant false alarm rate detector, which can detect HFM signal effectively in low SNR, and can adapt to the Doppler mismatch very well.
实验结果表明该检测系统可有效地避开空间的电晕及周期性脉冲干扰信号等低频段干扰。
The results indicate that the UHF system of detecting PD can effectively detect partial discharge and avoid outer corona interfere and Periodic pulse interfere.
根据推导结果设计了一种从白噪声中检测周期性信号的算法。
We design the algorithm to detect periodic signal from white noise by the derivation.
首先，在随机共振的原理基础上，给出了利用随机共振原理检测微弱周期信号的基本方法，并对方法进行了分析与验证。
Firstly the basic principle of stochastic resonance is introduced, an approach for detecting weak periodic signal using stochastic resonance theory is presented.
信号检测；周期性信号；信号相干函数；统计理论；周期图。
Signal detection; Periodic signal; signal coherence function; Statistical theory; Periodogram.
本文主要内容是讨论几种经典算法对周期信号的检测和参数估计。
A big part of this thesis discusses the detection and parameter estimation of periodic components with several algorithms.
在此基础上，对应用神经元实现含噪周期方波脉冲信号检测的最优条件和最优特性进行了分析。
On this basis, neuron is used to detect noisy periodic rectangular pulse trains. The conditions and the properties of optimal detection are analyzed.
实验室内研究需要产生包括混沌噪声在内的各种噪声，并叠加微弱周期信号作为微弱信号检测系统的信号源。
In laboratory study, all kinds of noise including chaotic noise, are needed to be generated, which iterated with weak periodic signal is used to be signal source.
通常检测的机械振动加速度信号，由于信噪比太低，即使存在周期性的冲击分量也往往被淹没在强的背景噪声之中。
However, in respect of a vibration acceleration signal, the signal to noise ratio (SNR) is often so small that the periodic impulse component is submersed in its intense background noises.
为在压气机整机进入深度失速前检测到失速起始信号，提出了一种基于平均数值差分的短周期扰动检测方法。
To detect stall inception signal before the whole compressor running into deep rotating stall, a method based on averaged numerical difference is developed to detect short length scale disturbance.
阐释了单个脉冲回波信号和多周期脉冲串回波信号，利用积累来提高检测性能的多种方法。
Some methods of enhancing detection performance in dealing with the single pulse echo signal and the multi-period pulse bunch echo signal by accumulating are summarized.
对直扩信号侦测的计算机模拟结果表明，该方法不仅能检测到低信噪比的此类信号，而且能提取到扩频码周期等参数。
One is the detection of low SNR DSSS signal and extraction of length of PN code, the other is detection of BPSK signal from multi signals.
分析了利用非周期随机共振进行基带信号检测的物理机制，提出了一种基于统计的信号恢复新方法。
The physical mechanism of signal processing based on the aperiodic stochastic resonance (ASR) system is analyzed, and a statistical approach for recovering the binary signal is proposed.
为了在不同噪声、信噪比下为基音检测算法提供更能准确反映基音周期实际变化的输入语音，本文将信号分解思想引入基音检测前端处理中。
In order to provide an accurate-pitch-cycle speech for pith detection algorithm with varied noise and SNR, we use signal decomposition theory in pre-processing of pitch detection.
针对局部放电在线检测中比较严重的周期性干扰信号，提出一种数字滤波的抗干扰措施。
A new digital filter and-interference technique is presented for suppressing continuous periodical signal which is a quite serious interference in on-line monitoring of PD.
依据多传感器数据融合原理的多周期检测数据融合处理方法，对滤除采样中的干扰信号、提高端面侧摆检测的准确性均十分有效。
Based on the data fusion theory of multi-sensor, a kind of method of more cycle measure and data fusion is suggested.
简要分析了陀螺输出信号的特点：噪声大、非线性、周期性，以及这些特点对检测有效信号的影响。
The characters of FOG's output signal which are with large noise, nonlinear, periodic and their consequences to the detection of the effective signal are analyzed briefly.
PSK非相干解调法将经延时半个载波周期的接收信号与原接收信号相加，检测出两相邻码元载波相位变化情况，从而解调出数字信息。
Non coherent demodulation for 2PSK detects relation of carrier wave phase of the interval symbol by the (half period of carrier wave) delay and the adder, then the data is demodulated.
PSK非相干解调法将经延时半个载波周期的接收信号与原接收信号相加，检测出两相邻码元载波相位变化情况，从而解调出数字信息。
Non coherent demodulation for 2PSK detects relation of carrier wave phase of the interval symbol by the (half period of carrier wave) delay and the adder, then the data is demodulated.
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