1) biased sampling
有偏差采样
1.
As the information included in images is not evenly distributed, the biased sampling based on the Epanechnilov kernel function can be adopted to make effective sampled images.
鉴于复杂图像所含信息的非均匀性,采用新的基于Epanechnikov核函数的有偏差采样方法对图像进行有效采样,并通过将贝叶斯阴阳机聚类理论对采样所得图像进行分割,进而获得最终的图像分割结果。
2) 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。
3) 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。
4) 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。
5) sampling time offset
采样时偏
1.
This paper presents a new method for joint estimation of carrier frequency offset and sampling time offset based on the recursive least-square(RLS)algorithm for OFDM systems in the tracking mode.
针对OFDM载波频偏与采样时偏的联合估计问题,提出了一种基于递推最小二乘(RLS)算法的新方法。
6) Sampling frequency offset
采样频偏
1.
In this paper, the sensitivity of sampling frequency offset in orthogonal frequency division MB-OFDM-UWB system is analyzed.
本文分析了MB-OFDM-UWB系统中采样频偏对系统性能的影响,进一步推导出存在采样频偏时接收端符号相位旋转的公式,结果表明,MB-OFDM-UWB系统中采样频偏对系统的影响不仅与 MB-OFDM-UWB数据帧的符号个数、子载波数相关,而且与循环前缀长度有关。
补充资料：逼近函数的偏差
逼近函数的偏差
deviation of an approxmating function
通近函数的偏差【山血位扣of ana即.油加tiI犯如‘丘.;yoo.e。。e np:6二:狱a沁川e‘中y。二明。。1 逼近函数g〔K和一个给定函数f任叨之间的距离p匆，f).在同一个类叨内可以考虑用不同度量p，譬如一致度量 p(g，f)一碧笃}g(x)一f(x)I，以及积分度量 /(。，，)一(i一(·)一，(·):“·)’‘’，p一和别的度量.至于逼近函数的类K则可以用代数多项式、三角多项式，还有f关于某个正交系的正交展开的部分和，这些部分和的线性平均，以及一些别的集之、
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