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- Doppler frequency error (DFE) 多普勒频率误差
- The sampling clock frequency error can cause ICI. 采样时钟频率偏差将导致ICI。
- 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。
- 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。
- DFT-Code acquisition method can estimate Doppler shifts while searching PN phase.It is necessary to increase the number of DFT points to keep the frequency error in the range of trace loop. DFT伪码捕获算法在进行伪码搜索的同时估计多普勒频偏,为了满足捕获精度要求,需要增加DFT点数,但随着运算点数的增加硬件实现难度成倍增长。
- 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.
- 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。
- A robust CAB algorithm is proposed in this paper which overcomes the sensitivity to the Cycle Frequency Error (CFE). 针对这一不足,本文提出了对循环频率误差稳健的循环自适应波束形成算法。
- 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。
- Differing from frequency error track, it avoid spurious modulation and complexity caused by phase-locked loops. 与频率误差跟踪不同,它避免了锁相环引入的寄生调制和复杂性。
- 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。
- Our results of the SAWF ares insertion loss about 8 dB, centre frequency error less than 60 kHz and Q value more than 590. 实验结果;主要技术性能指标达到插入损耗约8 dB;中心频率偏差小于60kHz;Q值则超过590.
- 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。
- Lastly, The jamming effectiveness is emphatically analyzed in the presence of bit error, bit width error and carrier frequency error. 最后分析了干扰信号在存在误码、元宽度误差以及载频误差情况下的干扰效果。
- 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。
- Under Tie-Line Bias Control (TBC) pattern, the area frequency modulation performance is affected directly by the value of frequency error factor k in area control error (ACE). 在TBC控制模式下,区域控制偏差(ACE)中频率偏差系数k的取值直接影响区域调频性能。
- 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。