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- 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。
- 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。
- 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。
- the Second-order Doppler Frequency Shift 二级多普勒频移
- differential doppler frequency shift 差动多普勒频移
- measurement by Doppler frequency shift technology 多普勒频移
- Doppler frequency shift compensate 多普勒补偿
- Doppler frequency shift compertsation 多普勒频率补偿
- Doppler frequency shift sensitivity 多谱勒频移敏感性
- Doppler frequency shift simulation 多普勒频移模拟
- HF Doppler frequency shift with high precision 高精度高频多普勒频移
- 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。
- The particle property of light and Doppler frequency shift 光的粒子性与多普勒频移
- The demodulation of ultrasonic Doppler frequency shift signal 超声多普勒频移信号的解调
- large Doppler frequency shifting 大多普勒频移
- A Method of Correcting Doppler Frequency Shift in Mobile Satellite Communication Systems 卫星移动通信系统多谱勒频移校正技术研究