envelope

同步MIMO-OFDM系统,分为SNR=10和SNR=20两种参数进行仿真。MATLAB程序。(Synchronous MIMO-OFDM system, into SNR = 10 SNR = 20 and two kinds of parameters for simulation. MATLAB.)

OFDM很容易在具有时延扩展或等效频率选择性的信道上使用。 频率选择性信道的特征在于延迟扩展或相干带宽，其测量频率中的信道去相关。 相干带宽与均方根（RMS）时延扩展成反比。 通过选择与信道相干带宽相关的子载波间隔，OFDM可以用于将频率选择性信道转换成频率平坦子信道的并行集合。 适合于平坦衰落信道的技术可以直接应用。(OFDM is simple to use on channels that exhibit time delay spread or, equivalently, frequency selectivity. Frequency selective channels are characterized by either delay spread or coherence bandwidth which measures the channel decorrelation in frequency. The coherence bandwidth is inversely proportional to the root-mean-square (rms) delay spread. By choosing the sub-carrier spacing properly in relation to the channel coherence bandwidth, OFDM can be used to convert a frequency selective channel into a parallel collection of frequency flat subchannels. Techniques that are appropriate for flat fading channels can then be applied in a straight forward fashion.)

经典的三代相干体算法C1/C2/C3,用于地震资料解释中，进行不连续性监测。(compute coherency in seismic interpretation)

有关分数阶傅里叶变换的程序，包含有稀疏分数阶的快速算法(Procedures for fractional Fourier transform, including a sparse Fast Algorithm for Fractional)

这是GMSK(高斯最小频移键控)的MATLAB仿真源程序(This is the GMSK (Gaussian Minimum Shift Keying) and MATLAB simulation source)

gmres算法的一个特殊形式，用来求解大型稀疏矩阵方程(gmres algorithm a special form used to solve large sparse matrix equation)

本文件是一个简单的S-function来算出realtime下将信号加倍的(This document is a simple S-function to calculate double realtime signal under)

利用方波调制和调制，可以设置不同的占空比以及幅值(Using a square wave modulation and modulation, can set different duty cycles and the amplitude)

MATLAB绘图，包含了MATLAB常用的绘图命令，对学习MATLAB具有很大的帮助。(MATLAB graphics, including the popular MATLAB graphics commands, to learn MATLAB great help.)

用窗函数法设计FIR带通滤波器。指标：低端通带截止频率wlp=0.35π 低端阻带截止频率wls=0.2π。高端通带截止频率whp=0.65π 高端阻带截止频率whs=0.8π。 (Design of FIR with window function bandpass filter target: low-pass with cutoff frequency wlp = 0.35π low stopband cutoff frequency wls = 0.2π passband cutoff frequency of high-end whp = 0.65π high stopband cut-off frequency whs = 0.8π)