在LTE系统中，一般采用在预先设置的频域位置放置已知的参考符号，接收端根据这些已知的参考符号，用最小二乘（LS）、最小均方误差（MMSE）或者离散傅里叶（DFT）的方法来估计信道参数，接收端的处理流程如图1所示，现有信道估计的流程如图2所示。
基于18个网页-相关网页
偏最小二乘法 PLS ; partial least squares ; partial least squares method ; Partial least square
偏最小二乘 PLS ; partial least squares ; GA-PLS ; Partial least squares regression
普通最小二乘法 OLS ; Ordinary Least Squares ; Method of Ordinary Least Squares ; ordinary least squares estimation
最小二乘准则 Criteriaofleastsquares ; least squares criterion ; Criteria of least squares ; Least Square
偏最小二乘回归 PLS ; PLSR
解非线性最小二乘问题 lsqnonlin ; leastsq
加权最小二乘法 WLS ; weighted least squares ; weighted least-squares method ; weighted least square estimate
序贯最小二乘估计 [数] sequential least squares estimation
递推最小二乘 RLS ; recursive least squares ; Recurrence Least Square
A least-squares fitting algorithm which take gradient amplitude as a weighting factor is proposed to fitting the marks’ centers. And this algorithm is proved to be accurate and robust by experiments.
在系统的研究各种中心位置获取算法的基础上,提出了一种利用梯度幅值作为权重因子的最小二乘拟合算法来求取标志点椭圆中心,并通过严格的实验证明了拟合算法的稳定性和准确性。
参考来源 - 便携式光笔三维坐标测量技术与系统研究Then, the mass, viscous frictional factor and disturbance force are estimated by the proposed estimator, composed of a recursive least-square (RLS) estimator and a disturbance observer.
其次，由递推最小二乘估计器RLS和负载扰动力观测器构成的估计器，估计动子质量、粘滞摩擦系数和负载扰动力。
参考来源 - 高精度永磁直线同步电动机伺服系统鲁棒位置控制器的设计·2,447,543篇论文数据，部分数据来源于NoteExpress
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