Description: We address the problem of blind carrier frequency-offset (CFO) estimation in quadrature amplitude modulation,
phase-shift keying, and pulse amplitude modulation
communications systems.We study the performance of a standard
CFO estimate, which consists of first raising the received signal to
the Mth power, where M is an integer depending on the type and
size of the symbol constellation, and then applying the nonlinear
least squares (NLLS) estimation approach. At low signal-to noise
ratio (SNR), the NLLS method fails to provide an accurate CFO
estimate because of the presence of outliers. In this letter, we derive
an approximate closed-form expression for the outlier probability.
This enables us to predict the mean-square error (MSE) on CFO
estimation for all SNR values. For a given SNR, the new results
also give insight into the minimum number of samples required in
the CFO estimation procedure, in order to ensure that the MSE
on estimation is not significantly affected by the outliers. Platform: |
Size: 1265664 |
Author:吴大亨 |
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Description: 非线性最小二乘法,L-M算法，单精度。可用于学习，科研-Nonlinear least square method, LM algorithm, single-precision. Can be used for learning, research Platform: |
Size: 3072 |
Author:typ |
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Description: 用MATLAB求解无约束的问题，主要有最速下降法，牛顿法，共轭梯度法，变尺度法（DFP和BFGS法），非线性最小二乘法。
用MATLAB求解有约束的问题，主要是外惩罚函数和广义乘子法。
以及一些对具体问题的分析，MATLAB的代码在文档里都有。
-Using MATLAB to solve the problem of non-binding, there are the steepest descent method, Newton method, conjugate gradient method, variable metric method (DFP and BFGS method), nonlinear least square method. Using MATLAB to solve the problem of binding, mainly outside the penalty function method and generalized multipliers. As well as some specific issues for analysis, MATLAB code in the document, are limitless. Platform: |
Size: 81920 |
Author:ljw |
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Description: 利用最小二乘法进行的非线性拟合，针对不同频率建立了非线性代数模型，并给出了验证算法。-The nonlinear fitting using the least square method about different frequencies,as well as the verifying cod. Platform: |
Size: 1592320 |
Author:付登科 |
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Description: 黎曼流形上的优化算法。目标函数定义在黎曼流形上，在流形上利用梯度下降等进行优化-Provides four iterations for optimization on the Steifel and Grassmann manifolds:
dog-leg steps
Polak-Ribiere nonlinear CG
Fletcher-Reeves nonlinear CG
Newton s method
Contains applications for nearest degenerate eigenproblems, least square diagonalization problems, Procrustes problems, and electronic structures problems Platform: |
Size: 30720 |
Author:sun |
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Description: 北航数值分析第三题，最小二乘法，求解非线性方程，能够为北航数值分析提供很好的支持。-Beihang numerical analysis third title, the least square method for solving nonlinear equations, numerical analysis of Beihang able to provide good support. Platform: |
Size: 314368 |
Author:yuchao |
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Description: 非线性最小二乘法Matlab实现
f=x(1)*K^x(2)*L^x(3)-b
Cobb-Douglas生产函数-Matlab nonlinear least square method to achieve f = x (1)* K ^ x (2)* L ^ x (3)-b Cobb-Douglas production function Platform: |
Size: 1024 |
Author:chester |
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Description: 最小二乘法，无论是在工程上还是在学术上都应用越来越广泛，文章给出了一个比较好用的最小二乘matlab 实现程序，很好用下载即可运行。-Least squares method, whether in engineering or applied more widely both the academic, the article gives a least squares matlab implementation relatively easy to use program, good to run with the download. Platform: |
Size: 3072 |
Author:lihaiqiang |
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Description: In this project, we have designed and implemented a method to estimate the dual frequencies in sinusoids immersed in additive white Gaussian noise. The Cramér-Rao lower bound (CRLB) for the signal model and a nonlinear least square frequency estimator are derived. The estimator is evaluated by
numerical examples. Platform: |
Size: 3072 |
Author:reza |
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Description: 非线性模型及其解法，最小二乘法，详细公式推导及个人理解，参考文献俱全-Nonlinear model and its solution, the least square method, detailed and individual understand formula, with references Platform: |
Size: 432128 |
Author:future |
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Description: 一种利用图像中直线特征的方法来标定摄像机畸变参数的方法。该方法提取图像中多组不同方向的平行直线，并对其利用非线性最小二乘方法进行优化以得到最优的畸变参数，在优化过程中，采用多步渐进的策略。该方法不需要已知三维世界坐标，易于实现。实验表明，该方法有较高的准确率。-A camera lens distortion method is proposed, which uses the straight line features. Many parallel lines of different direction were extracted, and then were used to optimize the distortion parameters by nonlinear least square. The thought of step by step was added when the optimization method working. 3D world coordination is not need to know, and the method is easy to implement. The experiment result shows its high accuracy. Platform: |
Size: 80896 |
Author:San |
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Description: 基于matlab的非线性最小二乘法，以一个多自由体系为例。(A nonlinear least square method based on MATLAB, taking a multi freedom system as an example.) Platform: |
Size: 9216 |
Author:zxm赵
|
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Description: LM 算法最小二乘法的概念，最小二乘法要关心的是对应的cost function是线性还是非线性函数，不同的方法计算效率如何，要不要求逆，矩阵的维数。(The concept of the least square method of the lm algorithm, the least square method should be concerned whether the corresponding cost function is a linear or nonlinear function, the different methods calculate the efficiency, or the inverse, the dimension of the matrix.) Platform: |
Size: 49152 |
Author:华南虎2
|
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Description: java高斯牛顿法，非线性最小二乘法，使用需根据实际情况改写，代码提供了一个范例(The Gauss Newton method, the nonlinear least square method, should be rewritten according to the actual situation, and the code provides an example) Platform: |
Size: 2048 |
Author:yozad.vom |
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Description: 最优化方法中的非线性最小二乘法,用于学习最优化方法和解决实际问题(The nonlinear least square method of optimization method is used to learn optimization method and solve practical problems) Platform: |
Size: 1024 |
Author:我定风波 |
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Description: 时间序列分析是根据系统观测得到的时间序列数据，通过曲线拟合和参数估计来建立数学模型的理论和方法。它一般采用曲线拟合和参数估计方法(如非线性最小二乘法)进行。时间序列分析常用在国民经济宏观控制、区域综合发展规划、企业经营管理、市场潜量预测、气象预报、水文预报、地震前兆预报、农作物病虫灾害预报、环境污染控制、生态平衡、天文学和海洋学等方面。(Time series analysis is a theory and method to establish mathematical model by curve fitting and parameter estimation based on time series data obtained from systematic observation. It is usually carried out by curve fitting and parameter estimation methods (such as nonlinear least square method). Time series analysis is often used in macro-control of national economy, regional comprehensive development planning, enterprise management, market potential prediction, meteorological forecast, Hydrological Prediction, earthquake precursor prediction, crop pest and disease disaster prediction, environmental pollution control, ecological balance, astronomy and oceanography.) Platform: |
Size: 53313536 |
Author:Sandy_Zhao |
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Search - nonlinear least square method