Cognitive radio; Spectrum sensing; Entropy; Signal correlation; Spectrum consistency.
认知无线电；频谱感知；信息熵；信号相关性；频谱一致性。
Multipath time delay estimation is constrained by the width of the signal correlation function when using correlation method.
当采用相关法估计时间延迟时，多径时延的分辨率受到相关函数主(？)宽度的限制。
Signal correlation analysis is a basic as well as an important method that owns wide applications in data processing in time domain and space domain.
信号相关分析是时域和空域中一种基本的、但又是重要的信号分析方法。
In consideration of the low signal-noise-ratio (SNR) of DSSS signals, a method of estimating the SNR was given by resolving the eigenvalue of the received signal correlation matrix.
针对直接序列扩频信号工作中信噪比较低的特点，提出了一种通过求解接收信号相关矩阵的特征值来估计信号信噪比的方法。
In HF channel modeling, doppler spread effects are usually simulated by filtering white Gaussian noise. The signal correlation in time domain deviates far from the theoretical value.
在短波信道建模中，通常采用对高斯白噪声滤波来仿真多普勒扩展效应，这些模型的时域相关值与理论值相差较大。
The correlation concept is introduced, the signal correlation function was defined and the correlation demodulation theory of the fiber grating sensing system was basically established.
引进关联概念，定义了信号关联函数，初步建立了光纤光栅传感系统的关联解调理论。
The highest correlation with age existed for disc signal.
与年龄的最高相关性存在于椎间盘信号。
Using software technology to design correlation filter, the digital filter of vibration signal was realized and the precision and work efficiency was improved.
通过软件的方法设计了相关滤波器，实现了对振动信号的数字滤波，有效地提高了精度和工作效率。
Simulation results show that the selection of reference signal depends not only on the correlation , but also on the distribution of vibration energy, which can be used to guide the signal selection.
仿真结果表明，参考信号的选择不仅与信号的相关性有关，还与振动信号的能量分布有关，为选择振动信号作为参考信号提供了依据。
Through estimating the signal and noise subspaces with the eigen-decomposition of the correlation matrix, the MUSIC algorithm is used to estimate the DOAs of LFM sources.
通过对相关矩阵进行特征值分解，估计信号子空间和噪声子空间，并利用MU S IC算法估计宽带LF M信号的波达方向。
The performance analysis of quadrature correlation detection algorithm for DS-SS signal is presented.
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 results demonstrate the cross correlation filter not only can suppress random noise in GPR signal but also confirm exactly the onset of reflection wave.
结果表明：应用该文所介绍的处理方法不但能有效压制探地雷达信号中的随机干扰而且能精确确定反射波的起跳点。
Based on NLMS, this paper proposes a decorrelation NLMS algorithm (DC-NLMS) by employing auto-correlation of the input speech signal.
在NLMS算法的基础上，从语音信号相关性的角度出发，提出了一种去相关NLMS算法(DC -NLMS)。
Meaning: The self-correlation function and power spectrum density Function of a power-typed signal compose a FT pair.
上式表明：功率型信号的自相关函数与其功率谱密度函数构成傅立叶变换对。
According to the relationship between auto correlation function and its spectral density, a new type of decision tree method based on signal analysis theory is proposed in this paper.
该文根据自相关函数与谱密度函数之间的对应关系，提出了一种新的基于自相关函数的决策树归纳学习算法。
The algorithm utilizes the correlation of output error signal to adjust the step size, solves the inconsistency problem of misadjustment and convergence time, and allows more flexibility in using.
该算法利用误差信号的相关值去调节步长，解决了算法收敛时间与稳态误差间的矛盾，为实际应用提供了更大的灵活性。
Operation of discrete convolution and discrete correlation will spend too much time to process a signal in time.
时域离散卷积和相关运算一般耗时太长，对信号进行处理的实时性较差。
A measurement system for sine signal phase difference is designed by using DSP and digital correlation method.
设计一个采用DSP技术和数字相关法测量两路正弦信号相位差的检测系统。
According as principal of cross-correlation, the hardware circuit is used to restrain noise efficiently and acquire faint change of crack signal.
根据互相关原理，设计了相应的硬件相关电路，有效的抑制了噪声并能够提取缺陷信号的微小变化量。
Based on the Gaussian signal detection principle under Gaussian noise, the correlation detection is analyzed in theory.
从高斯噪声中高斯信号的检测原理出发，对相关性检测器进行了理论分析。
By means of the principle of correlation analysis, this paper introduces an approximate method for estimating signal-to-noise ratio on random noise background.
本文利用相关分析的原理，提出一种在随机噪音的背景上估算信噪比的近似方法。
A new perfect correlation signal was proposed, which can be called as almost perfect punctured binary sequence pairs. Its properties and combinatorial admissibility conditions were studied.
提出一种新的最佳相关信号，即几乎最佳屏蔽二进序列偶，研究了其变换性质和存在组合的允许条件。
The lab analysis showed the correlation wavelet of log-partitioning sweeping signal has minimum correlation side lobe.
实验室分析表明，对数分段扫描信号的相关子波有着极小的相关边叶。
Optical correlation is realized by using turn-mirror scanning non-coherent signal dynamically.
利用转镜进行非相干光的动态扫描可以实现光信号的相关。
In the light of the characteristic of WSD (weak signal detecting), puts forward the reference channel and correlation principle to handle the signals.
针对微弱信号检测的特殊性，提出采用参考通道，并应用相关原理处理信号。
For high correlation signal, its performance is superior to those of NLMS algorithm and DCR-LMS algorithm.
对于强相关性信号，新算法的稳态失调小于NLMS算法和DCR - LMS算法。
The result of experiment shows that the property of correlating output signal and the joint correlation recognition ability is improved by this system.
理论分析和实验结果表明，该方法能够抑制低频成分，改善相关输出信号的性能，提高系统的相关识别能力。
This paper presents a new kind of perfect correlation signal, that is, odd-periodic perfect punctured binary sequence pair.
定义了一种新的最佳相关信号，即奇周期最佳屏蔽二进序列偶。
Selection of proper parameters on the basis of this conception to sample the signal can realize the phase correlation between the sampling signal and the measured signal.
利用这一概念选取合适的采样参数对测量信号进行采样，可实现采样信号同待测信号相位相关。
An adaptive color signal spatial clustering technique based on area correlation is used and thus the target detection effect is improved.
使用基于区域关联性的彩色信号自适应空间分集检测技术，提高目标检测效果。
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