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1)  sampling clock frequency offset
采样时钟频率偏差
1.
Three different sampling clock frequency offset and residual frequency offset estimation methods were developed to improve their estimation accuracy in internet protocol-orthogonal frequency division multiple access(IP-OFDMA)system,and the characteristics of the pilot structure in IP-OFDMA system was considered.
为提高基于网络协议的正交频分多址(IP-OFDMA)系统中采样时钟频率偏差与残余频偏的估计精度,结合IP-OFDMA的自身导频结构特点,对经典估计方法进行改进,提出3种不同采样时钟频率偏差与残余频偏的估计方法。
2)  sample frequency offset
采样钟频率偏移
1.
The effect of sample frequency offset was exploited on multi-input multi-output orthogonal frequency-division multiplexing(MIMO-OFDM) signals.
分析了采样钟频率偏移对MIMO-OFDM系统接收信号的影响,提出了一种适用于MIMO-OFDM系统的采样钟频率偏移估计算法,即幅度加权最小平方估计法。
2.
An efficient, accurate, hardware-based method realized via FPGA was proposed to dissolve the problems of integer frequency offset, fraction frequency offset, sample frequency offset and timing offset in OFDM system, etc.
针对OFDM系统频域中的整数倍频率偏移、小数倍频率偏移、采样钟频率偏移和定时偏移等问题,本文提出了相应的解决方案,并采用FPGA对各方法进行硬件电路实现。
3)  clock frequency deviation
时钟频率偏差
4)  sampling frequency offset
采样频率偏差
1.
By adopting code rate as timing benchmark,the code tracking loop in the receiver tracks and calculates the sampling frequency offset between the actual and nominal values.
为避免采样频率偏差给卫星导航接收机带来的符号位滑动、伪随机噪声码相位移动和载波相位偏差等问题,提出了一种改进的频率偏差估计方法。
2.
The sample timing error and sampling frequency offset are analyzed respectively in detail by the digital model.
针对采样时钟同步偏差对正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统的影响,建立了数学模型,分别就采样定时偏差和采样频率偏差的影响进行详细分析;经过仿真,从星座图、误码率(Bit-Error-Rate,BER)及信噪比(Signal-to-Noise Ratio,SNR)损失等角度对采样频率偏差的影响做了揭示和验证。
3.
Compared with original time domain phase detector,the improved one is self-normalized and bears sampling frequency offset up to ±90ppm,three times as much as the former method.
该方案采用全数字延迟锁定环来跟踪定时误差,与传统的时域鉴相器相比,本文提出的鉴相算法能实现增益的自动归一化,且捕获范围为原算法的三倍,能纠正采样频率偏差达到±90ppm。
5)  sample timing error
采样定时偏差
1.
The sample timing error and sampling frequency offset are analyzed respectively in detail by the digital model.
针对采样时钟同步偏差对正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统的影响,建立了数学模型,分别就采样定时偏差和采样频率偏差的影响进行详细分析;经过仿真,从星座图、误码率(Bit-Error-Rate,BER)及信噪比(Signal-to-Noise Ratio,SNR)损失等角度对采样频率偏差的影响做了揭示和验证。
6)  sampling clock
采样时钟
补充资料:采样频率
(Samplingfrequency)在单位时间内(如一日、一月、一年)应该取样的次数。测量水量和水质的数据都具有随机性,为获得随机变量的统计特征值,必须进行频繁的观测,以保证样本特征值能代表总体。它是按一定的设计要求进行推算,以确定应测量的次数,将求得的所需取样的次数大致均匀地分配在所要求的整个监测期间,就可确定出采样频率。
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