1) Initial frequency offset
初始频率偏移
2) initial frequency shift
初始频率移动
3) initial frequency
初始频率
1.
By computing the quadratic phase (QP)function of the signal,it is shown that the QP function is concentrated along the frequency rate law of the signal So the peak of the QP function yields the estimates of the frequency rate,and the initial frequency is obtained by the dechirp technique.
该算法利用计算信号的二次相位函数,得到其能量分布集中于信号的调频率曲线上的结论,因此通过谱峰检测可以获得信号的调频率估计,进而通过解调频技术得到初始频率的估计。
2.
By fractional dimension search,the Chirp rate,initial frequency,pulse width and time of arrive are estimated with relatively high accuracy at negative SNR.
基于时域压缩宽窄变换,提出一种宽带线性调频脉冲的检测与参数估计方法,避免了对宽带信号采集的根本性困难,能在负信噪比条件下实现未知参数chirp脉冲信号的检测,通过分维搜索精确地估计出调制斜率、初始频率、脉冲宽度和到达时间。
3.
Based on the remainder theorem and direct dechirp operation,an algorithm for estimation of chirp rate and initial frequency of the subsampling wideband LFM signal unambiguously is presented.
基于中国余数定理解频率模糊和解线调方法,提出一种无模糊欠采样的宽带线性调频信号的调频斜率和初始频率的估计算法。
4) Frequency deviation
频率偏移
1.
According to the fundamental principle of correlation function,the effe ct of measuring accuracy resulting from frequency deviation is analyzed in this paper.
从相关函数的基本原理出发,分析了频率偏移对信号测量准确度的影响。
2.
On the basis of high precision requirement for input signals in the power system protection and control system,this paper,only for the influence of power system frequency deviation on extracting fundamental harmonic,studies the amplitude error of Fourier algorithm,presents a method of correcting frequency deviation,and further derives the formulas of improved Fourier algorithm.
针对电力系统微机保护和控制系统对输入信号精度的要求 ,研究了电力系统频率偏移对傅立叶算法的影响 ,提出一种消弱频率偏移影响的方法 ,并推导出校正频率偏移的改进傅立叶算法 。
3.
As for digital self excited control system for use with synchronous generator, this paper analyses the influence of power system frequency deviation on automatic excitation regulator, derives the rule of voltage error varying while system frequency deviates from normal rating and presents a kind of correcting method.
本文针对数字式同步发电机自并励静止整流器励磁控制系统 ,研究了电力系统频率偏移对励磁控制的影响 ,导出了调节励磁电压的误差随频率偏移的变化规律 ,并提出了对励磁调节误差进行校正的方法。
5) frequency offset
频率偏移
1.
Effects of OFDMA system performance caused by frequency offset and synchronization error;
频率偏移和同步误差对OFDMA系统性能的影响
2.
The effect of frequency offset on YBX-1 high-frequency transceiver;
频率偏移对YBX-1型高频收发信机的影响
3.
To solve the problem of frequency offset out of intermediate frequency(IF) bandwidth for microwave and millimeter wave amplitude and phase receivers, an optimal architecture of low-IF quadrature receiver combining with double-sideband suppressed-carrier(DSBSC) was presented.
为解决微波毫米波幅相接收机的频率偏移超过中频带宽的问题,提出了一种低中频正交接收机结合双边带抑载的优化结构。
6) frequency shift
频率偏移
1.
The principle and the design of quadrature-beamformer are discussed and the effect of the frequency shift on the beam axis is theoretically analyzed.
介绍了正交波束形成器的原理和设计方法,针对频率偏移对波束主轴方向的影响进行了理论分析和讨论,仿真结果验证了理论分析的正确性。
2.
The frequency shift is obtained and compared with the effect of air damping.
推导了吸附效应影响下的频率偏移,并与空气阻尼对谐振频率的影响进行了比较。
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条