pure_aloha

文章对几种常用的基于循环前缀(CP)的最大似然同步算法进行了分析，并对其频偏估计方差进行了比较；同 时针对基于CP 的同步算法在多径衰落信道下性能较差的情况，提出了一种改进的CP 同步算法并进行了仿真，结果表明相比 于原ML 算法，文中算法在多径信道下可有效提高频偏估计性能。(】This paper does some research on multiple maximum-likelihood (ML) algorithms based on cyclic prefix (CP) and compares variances of frequency-offset estimation After the analysis of the bad performance of CP based algorithms in multi-path fading channels, an improved CP algorithm is proposed and the simulation shows that this algorithm can improve its performance effectively in multi-path fading channels.)

用matlab编写的kalman滤波源程序，经过详细测试绝对可以可靠使用(Prepared using matlab kalman filter source code, after careful testing can certainly use a reliable)

this the atp_emtp model of the tcsc with the sampling of the signal this is one of the advanced sofware call atp-emtp used to get the most accurate transients

clear all clc t=0:1/1000:10-1/1000 s=sin(2*pi*t) snr=20 s_power=var(s) varience of s linear_snr=10^(snr/10) factor=sqrt(s_power/linear_snr) noise=randn(1,length(s))*factor x=s+noise Ó É SNR¼ Æ Ë ã Ë æ » úÔ ë É ù x1=noise Ô ë É ùÔ ´ Ê ä È ë x2=noise w1=0 È ¨Ï µ Ê ý ³ õ Ö µ w2=0 e=zeros(1,length(x)) y=0 u=0.05 for i=1:10000 LMSË ã ·¨ y(i)=w1*x1(i)+w2*x2(i) e(i)=x(i)-y(i) w1=w1+u*e(i)*x1(i) w2=w2+u*e(i)*x2(i) end figure(1) subplot(4,1,1)

了仿真微动在一维距离像中的表现，这一段代码的目的是分析振动对一维距离像中的相关特征的表征(Micro-simulation in a dimensional range of performance, this piece of code designed to analyze the vibration of a dimensional range characterization of the relevant characteristics of)

这是用matlab显示K线图的源码,还没有很多的指标，可以继续完善(this is a matlab m file to express stock chart)

交互式多模型卡尔曼滤波, IMM3_KF(IMM Kalman filter, IMM3_KF)

estimate offset time for pulse that modulate in bpsk and compare pe to snr with without offset . we assume offset is between 0 to 4

用fortran程序实现两个矩阵相乘，短小精悍(multiplication of two matrix )

说明：  这是基于MATLAB中的stateflow的一个简单的单水箱状态机(Single Water Tank State Machine)