讨论了加窗对频率估计误差的影响。
The effect of the weighting window on frequency estimation accuracy is also discussed.
提出了频点自跟踪自适应频率估计器。
Frequency auto-tracking adaptive frequency estimator (FATAFE) is brought forward.
提出了一种新的正弦信号频率估计方法。
A new method for estimating the frequency of a sinusoid signal is proposed.
研究去除多普勒频率估计野值点的方法。
A method of removing the estimating outliers of Doppler frequency is studied.
研究均匀圆形阵列的联合二维角度-频率估计问题。
Investigates the problems of joint 2-d angular and frequency estimation based on uniform circular array (UCA).
在第三章中，介绍了基于信号稀疏分解的频率估计方法。
In the third chapter, a measure of frequency estimation based on signal sparse decomposition is introduced.
提出了一种基于子空间投影技术的多普勒调频率估计方法。
A Doppler rate estimation method based on sub-space projection technique was proposed.
随着频偏的增大，自适应频率估计的偏差和方差也随之增大。
With frequency bias increasing, estimated bias and variance of adaptive frequency estimator (AFE) enlarge.
频率估计公式包括采样序列DFT、相位差计算和频率计算。
The set of formulas consists of DFT of sampled data, phase difference calculation and frequency calculation.
本文研究非高斯arma有色噪声中的正弦信号频率估计问题。
This paper discusses the problem of estimating the frequencies of sinusoidal signals in colored non-Gaussian ARMA noise.
与以前的频率估计方法相比，它有许多优点，是一种有效的新方法。
It has advantages over previous frequency estimating methods, and is a new kind of efficient method.
在时间域考虑了测量噪声，使得多普勒频率估计的似然概率达到最大。
By maximum likelihood estimation, the likelihood probability of estimating Doppler frequency is maximized.
在强噪声背景下，针对BPSK调制信号，提出了一种新的频率估计技术。
A new frequency estimation technique for BPSK modulation signals embedded in strong noise is proposed.
频率估计和频谱分析是在电子侦察系统中进一步分析复杂通信信号的基础。
Frequency estimation and spectrum analysis are the foundation of the analysis of complex communication signals in electronic reconnaissance system.
只要信噪比不甚低，频点自跟踪频率估计是无偏的且估计方差接近理论下限。
FATAFE realizes unbiased estimation and its estimated variance approaches to theoretical lower bound if only signal-to-noise ratio is not very low.
为了实现高分辨率成像，在保证系统实时性的同时还要保证中心频率估计的精度。
To implement imaging with high resolution, real-time and precision of Doppler centroid estimation at the same time must be ensured.
如果将空间的位移变成时间的延迟，单个矢量传感器可以实现高分辨率的频率估计。
If the space shift invariance is replaced by the time shift invariance, the high resolution frequency estimation can be obtained using a single vector sensor.
因此，本文拟在不改变扫频带宽的前提下提高频率估计精度从而提高距离测量精度。
The thesis plans improving frequency estimation accuracy, without changing the bandwidth of the transmitted signal. So, we can improve the range estimation accuracy.
结果表明基于矢量传感器的算法比基于声压传感器的算法具有更高的频率估计精确度。
The results indicate that ESPRIT algorithm based on vector sensor can obtain higher resolution frequency estimation than that based on pressure hydrophone.
在无参考点海洋sar定位方法中，多普勒中心频率估计对定位精度有着重要的影响。
Estimation of Doppler central frequency has an important effect to accuracy of fixed position in the fixing approach with no reference points for ocean SAR.
为了实现高准确的测量对象的速度，激光多普勒测速雷达系统建立和频率估计算法研究。
In order to achieve high accurate measurement of object's velocity, a laser Doppler velocity radar system is established and the frequency estimation algorithm is investigated.
频率跟踪就是依据前一次频率估计修改下一次采样的采样间隔，从而使同步偏差越来越小。
Frequency tracking means that sampling intervals of following sampling is updated according to new frequency estimation, so synchronous sampling error will be reduce step by step.
并运用大量仿真，对本方法在谐波、电压波动等干扰环境下基本频率估计的有效性进行验证。
Finally, the fundamental frequency estimation under different PQ disturbances condition, such as harmonics, voltage fluctuations, etc, is analyzed by simulation respectively.
分析了空间谱估计中多信号源方向和频率估计中通道失配和阵元互耦导致系统性能下降的机制。
The mechanism of the performance degration for space-frequency spectrum estimation due to ChannelMismatching and Sensor Coupling is analyzed.
提出了将基于FFT的频率估计法和基于多重信号分类(MUSIC)的频率估计法相结合的新思路。
A new thought of combining frequency estimate method based on FFT with that based on multiple signal classification (MUSIC) is presented.
该算法具有相对频率估计精度高、解模糊过程简单、运算量小、多普勒频率变化率测量精度高等优点。
The relative frequency and Doppler frequency rate estimation accuracy is high, and the process of solving the ambiguity is simple.
试验结果表明系统在不增加测试时长情况下能有效提高斜拉索固有频率估计的精度，从而能得到精确索力值。
Experiment result also proves that system can improve the measuring precision effectively and then get the more accurate cable force in the case of not increasing the measuring time.
这两种方法既可用于多段线性调频连续波探测回波的积累检测，也可用于多个相参脉冲信号的积累与频率估计。
The new methods can be used in both detection of FMCW echo and frequency estimation of correlative pulse train.
这两种方法既可用于多段线性调频连续波探测回波的积累检测，也可用于多个相参脉冲信号的积累与频率估计。
The new methods can be used in both detection of FMCW echo and frequency estimation of correlative pulse train.
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