双音多频(DTMF)信号的MATLAB仿真

对OFDM系统进行自适应分配，主要对子载波，比特和功率进行分配，已达到降低发射端功率的目标。(Adaptive Allocation for OFDM systems, the main pair carrier, bit, and power distribution, has reached the goal of reducing the transmitter power.)

用MATLAB和VisualC_混合编程及应用(Hybrid Programming with MATLAB and VisualC_ and application)

use system identification toolbox in MATLAB to identify and estimate the model

1．产生一个连续信号，包含低频，中频，高频分量，对其进行采样，进行频谱分析，分别设计三种高通， 低通，带通滤波器对信号进行滤波处理，观察滤波后信号的频谱。 2.采集一段含有噪音的语音信号（可以录制含有噪音的信号，或者录制语音后再加进噪音信号），对其进行 采样和频谱分析，根据分析结果设计出一合适的滤波器滤除噪音信号(1. Produce a continuous signal, including low-frequency, medium frequency, high-frequency components, its sampling, spectral analysis, are designed for three high-pass, low pass, band-pass filter the signal filtering treatment to observe the signal spectrum after filtering. 2. Acquisition section of the speech signal contains noise (can record a signal containing noise, or voice recording, additional noise after the signal), its sampling and spectral analysis, based on an analysis of the results to design a suitable filter to filter out one noise signal)

说明：  分析矩阵的相关性，即给出两个矩阵，计算两个矩阵之间的距离，并画出矩阵的相关分析图。(this matlab code can compute the two matrix length, and can give analysy ficture )

蚁群算法是一种用来在图中寻找优化路径的机率型算法。是一种求解组合最优化问题的新型通用启发式方法，该方法具有正反馈、分布式计算和富于建设性的贪婪启发式搜索的特点。通过建立适当的数学模型，基于故障过电流的配电网故障定位变为一种非线性全局寻优问题。(Ant colony algorithm is a method used to find optimal path in the graph the probability-based algorithm. Is a combination of optimization problems to solve new general heuristic method, which has a positive feedback, distributed computing and constructive and the greedy heuristic search features. Through the establishment of an appropriate mathematical model, over-current fault-based distribution network fault location into a nonlinear global optimization problem.)

gen random bit with Matlab code, using rand()

压缩感知matlab代码及说明，适合初学者学习使用.关于SAR雷达，含7个代码(Compressed sensing matlab code and instructions for beginners to learn to use. Regarding SAR radar, with 7 code)

信道模型包括模拟多径造成的指数衰减模型、模拟噪声干扰的 AWGN模型、以及频率偏差，主要 Matlab 实现(Channel model including the simulation of multipath caused by the exponential decay model to simulate the noise of the AWGN model, and the frequency deviation, the main Matlab Implementation)

spectal substraction