K-means-cluster

A semi blind technique for estimating the carrier frequency offset in OFDM communication systems is presented in this paper. The fractional and integer frequency offsets are esti-mated by employing a few null subcarriers in the rst OFDM symbol in a frame. While the conventional null subcarrier based methods estimate the offset by a single global search, the proposed method employs a two stage estimator, which greatly minimize the computational complexity.

本文针对基于经验模态分解ＥＭＤ的时空滤波器存在的固有模态函数分量中频率混叠交叉导致有用信号与噪声一起被滤除的问题结合小波在时间尺度两域表征信号局部特征的特性提出了一种基于能量估计实现ＥＭＤ分解层数确定(In this paper, based on empirical mode decomposition EMD temporal filter mode functions inherent component of cross-frequency aliasing and noise together lead to useful signal is filtered in the time scale of the problem combined with wavelet domain characterization of two local features of the signal characteristics of proposed achieve energy estimation based on EMD decomposition level determined)

按照一定的要求和参数生成一级海杂波，主要用于雷达海杂波仿真。(Sea clutter level is generated in accordance with certain requirements and parameters, and generate graphics with matlab.)

说明：  六轴机器人用d-h建模，蒙特卡罗方法打点确定工作空间(Six-axis robots are modeled by D-H and the workspace is determined by Monte Carlo method.)

ahp的matlab算法实例，可以很轻松的输入matlab计算ahp法中的指标权重，以及一致性指标(Allow phonetic typing Type text or a website address or translate a document. Cancel Ahp de matlab suànfǎ shílì English Spanish Arabic Alpha the ahp the Matlab algorithm instance)

关于matlab图像增强的源代码，可以用在实际生活背景中，例如雾天模糊图像增强等等(Image enhance)

近场声源定位TDOA的MATLAB仿真，采用传统的相关算法CC和广义相关算法中的相位转换算法GCC_PHAT(Sound localization of MATLAB simulation, using the traditional algorithms of CC and phase transformation algorithm of generalized correlation algorithm GCC PHAT)

说明：  轴承外圈故障仿真的信号，简单实用，欢迎朋友提供内圈，滚动体，保持架仿真信号！(Signal of Bearing Outer Ring Fault Simulation)

simulink 采样系统的一个简单的例证，采样周期为0.1，使用了保持器(simulink sampling system, a simple example, the sampling period is 0.1, the use of retainer)

介绍了什么是函数文件及如何编写函数文件等等(What is the function of the document describes how to write functions and files, etc.)