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- Doppler frequency evaluation 多普勒频率估计
- 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。
- 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 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 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。
- 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。
- 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。
- This paper concerns relative technologies about carrier frequency synchronization and estimation in downlink signal in large doppler frequency shift condition. 本文对大多普勒频移情况中，下行信号载波频率同步估计的相关技术进行了研究。
- A new method for digital identification and demodulation of MPSK signals is presented under the condition of the Doppler frequency shift of channel attenuation. 针对衰落信道中广泛存在的多普勒频移现象,本文提出了一种MPSK信号数字化识别解调的方法。
- The principle of single GPS based wave buoy is introduced.GPS buoy measures horizontal and vertical wave motion using GPS signals with Doppler frequency shift effect. 摘要首先对GPS浮标测波原理进行分析，介绍了GPS接收器测量运动参数的多普勒方法；
- A large Doppler frequency shift estimation algorithm was proposed, which is called large Doppler frequency shift estimation algorithm based on AR model. 给出了一种适用于卫星通信的大频偏估计算法，文中称之为基于AR模型的大频偏估计算法。
- A measure velocity method is given by michelson intefese to deal with Lasen Doppler frequence change. 通过采用迈克尔逊干涉处理激光多普勒频移信息的方法，实践测量物体运动速度。
- Under the condition of zero Doppler frequency shifts,this kind of"waveform pair"is equivalent to polyphase Barker coded waveform at costs of a small amount of loss in signal-to-noise ratio and widening of the bottom of mainlobe. 在零多普勒频移条件下，这类“波形对”能以少量信噪比损失为代价使脉压输出波形的主旁瓣比等于码序列的长度，也就是说，从主旁瓣比的角度讲，这类“波形对”可以等效为相应长度的多相巴克码波形。
- Methods based on spatial frequencies evaluate the coefficients of the autocorrelation function of the texture. 基于空间频率的方法估计纹理的自相关函数。
- Numerical results show that the BER performances of ideal MRC are the lower bounds on the BER performances of non-ideal MRC and deteriorate as the maximum Doppler frequency increases or the SNR of channel estimate decreases. 数值分析结果表明，非理想信道估计下最大比合并的误码率性能是以理想信道估计的结果为下界，并随着最大多普勒频移的增加或信道估计信噪比的减小而逐渐劣化。
