用K-means算法对数据进行聚类分析 Kmeans

基于SIMULINK的完整OFDM系统，包括RS信道编码，交织，多种方式调制解调，插入导频，串并变换，信道估计，信道均衡等关键技术。(Based on SIMULINK complete OFDM system, including RS channel coding, interleaving, a variety of ways modulation and demodulation, insertion pilot, serial and parallel conversion, channel estimation, channel equalization and other key technologies.)

南航张小飞的书《阵列信号处理的理论和应用》，包括原书的PDF和MATLAB代码，内容为波束形成和阵列参数估计等内容。(Southern China Zhang Xiaofei book "array signal processing theory and application", including the original book PDF and MATLAB code, content for beamforming and array parameter estimation and so on.)

说明：  雷达回波脉冲压缩常用代码，包括线性调频信号的时频特性，脉冲压缩，压缩后拓展等(Common codes for radar echo pulse compression, including time-frequency characteristics of LFM signal, pulse compression, expansion after compression, etc.)

欧洲标准DVB-S2的LDPC编码的实现代码(European standard DVB-S2 LDPC encoding implementation code)

To understand the transmission scheme for QPSK modulation. To design a simple transceiver structure operating in a noisy channel.

说明：  我在美国公司用的CA code GPS toolbox(this is matlab toolbox I write and use in my company for simulating a CA code in GPS)

前后向平滑算法：算法的原理很简单，以五点三次平滑为例。取相邻的5个数据点，可以拟合出一条3次曲线来，然后用3次曲线上相应的位置的数据值作为滤波后结果。简单的说就是 Savitzky-Golay 滤波器 。只不过Savitzky-Golay 滤波器并不特殊考虑边界的几个数据点，而这个算法还特意把边上的几个点的数据拟合结果给推导了出来。(Before and after the smoothing algorithm: the principle of the algorithm is very simple, to 5.3 times smooth as an example. Take the adjacent five data points, you can fit out a curve 3 times, and then use the corresponding position on the third time the data value as the filtered results. Simply said is the Savitzky-Golay filter. However, the Savitzky-Golay filter does not specifically consider several data points of the boundary, and this algorithm also specifically to the edge of a few points of the data fitting results derived.)

信道比特分配需要根据信道好坏分配，可采用自适应chow算法 MATLAB编程( U81EA u9002 u5E94chow u7B97 u6CD5 MATLAB u7F16 u7A0)

说明：  固定权值的常规波束形成，波束主瓣随着权值的变化而变化(A fixed weight of conventional beam forming, beam main lobe with the right and change the value of)

本软件使用matlab预言编写，用于分析光子晶体光纤空气孔直径，孔间距，等参数对光子晶体光纤单模特性的影响。(Matlab predicted the use of this software to prepare for the analysis of photonic crystal fiber air hole diameter, hole spacing, and other parameters on the photonic crystal fiber single-mode characteristics.)