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Doppler frequency difference 多普勒频率差
The doppler frequency is a function of the two scattering directions. 多普勒频率是两个散射方向的函数。
The Doppler frequency can be obtained as a heterodyne or beat effect. 由于外差或频差效应，能够得到多普勒频率。
The realization of location using the difference of doppler frequency is discussed, the formula for the location error is derived and its simplification form with data simulation is presented. 讨论了多普勒频率差定位技术的实现方法，推导了定位误差公式，并给出了实际使用时的简化而直观的形式，同时进行了数值模拟.
After the frequency difference is compensated, the method of TDE is presented. 最后给出了频差补偿的时延估计方法。
The photocurrent frequency difference is proportional to rotational velocity. 实验验证了该方法的可行性。
With the high frequency, it can get great Doppler frequency which bepropitioustomeasure slow velocity. 其频率高,可获得更大的多普勒频率,更有利于慢速目标的检测;
A new technique to estimate the Doppler frequency rate is proposed with high accuracy and low computation complexity. 本文提出了估算多普勒调频率的一种新方法,其精度高、计算量少。
According to the laser gain change is linear related to the frequency shift, the Doppler frequency is extracted by the signal processing. 根据激光的增益变化和频率变化成线性关系，可以对信号进行处理求出多普勒频移。
This algorithm has small computation amount load and has high estimation precision of doppler frequency rata-of-change. 算法具有计算量小、多普勒频率变化率估计精度高的优点。
The obtained maximum frequency difference was 1.3GHz, the minimal was 50MHz because of the strong mode competition. 实验中得到双频激光稳定运转时频差的上限约为1.;3GHz; 由于强模竞争现象的存在;实验中所观察到的频差下限为50MHz
The arithmetic of target motion analysis is studied in this paper by means of Doppler frequency and bearing in Cartesian coordinates. 摘要研究一种在直角坐标系下利用多卜勒频率和方位信息的目标运动分析算法。
Then after amplitude limiting, to be preamplified, demodulated, bandpass filtered, the doppler frequency shift signal is extracted. 经过限幅保护，接收放大，检波和带通滤波后，将多普勒频移信号提取出来。
The small center frequency difference between NBI and spread spectrum signal or the large NBI power will make spread spectrum communication invalid. 但当信道中窄带干扰(尤其是时变窄带干扰)的中心频率和直扩信号的中心频率近似,或功率远大于直扩信号功率时,直扩通信可能失效。
The CRAs and CRVs morphological features of Doppler frequency shift spectrums were recorded and analyzed with DRG Doppler retinal flowmeter(10 Mhz probe). 方法:采用 DRG眼用多普勒血流仪,对正常成年人男女各 24名双眼的 CRA、CRV多普勒频谱图象进行采集和形态分析。
Based on the experimental data, some performance parameters of sensor are evaluated, and the function formula between wetness and frequency difference is matched. 根据测量数据，对传感器的部分性能指标进行了评估，得出了湿度与频差间的函数关系。
When there exists general array error in uniform linear array (ULA), an estimation of the direction of arrival (DOA) and Doppler frequency for signals was proposed. 摘要在均匀线阵存在阵列误差的情况下，提出了一种信号波达方向和多普勒频率估计方法。
The precision of the ultrasonic flowmeter with small tube diameter and frequency difference method is affected by several factors,so to gain more accuracy is difficult. 小管径频差法超声波流量计的测量精度受各种因素的影响，因而获得较高精度比较困难。
Abstract When there exists general array error in uniform linear array (ULA), an estimation of the direction of arrival (DOA) and Doppler frequency for signals was proposed. 摘要在均匀线阵存在阵列误差的情况下，提出了一种信号波达方向和多普勒频率估计方法。
The method for generating the second signal is put forward based on the period rule of the phase difference for two frequency signals with the frequency difference. 摘要利用两个有一定频差的频率信号相位差变化的周期性规律提出了一种秒信号产生方法。