LDPC码

matlab计算数据的AMR、ATR、RMS等特征值(calculate AMR and ATR of the data)

说明：  经典无线链路预算模型，预测了在自由空间中由地形的非规则性造成的中值传输衰落。该模型适用于频段为20MHz至40GHz、路径长度为1km至2000km的情况。对于给定的传输路径，该计算机程序通过频率、路径长度、极化方向、天线高度、表面绕射率、地面有效半径和地面导电常数等参数可以确定传输损耗的大小。(Classic wireless link budget model, forecasts the in free space caused by terrain of regularity in the value decline.The model is suitable for the frequency of 20 MHZ to 40 GHZ, path length of 1 km to 2000 km.For a given transmission path, this a computer program can calculate the value of the transmission loss by frequency, path length, polarization direction, antenna height, surface diffraction, effective radius of the ground and ground conductivity constant parameters and so on.)

its a useful document about USB2 HOST

qpsk调制 预失真仿真程序 基于matlab开发环境( LUT predistortion matlab simulation)

说明：  本文主要从自适应调制的算法及实现出发，引入了OFDM子载波分组的概念，详细阐述了五种固定阈值算法和子带BER预估计算法的原理及实现，并在此基础上加入自适应编码，实现自适应调制与编码。(Based on the algorithm and implementation of adaptive modulation, this paper introduces the concept of OFDM subcarrier grouping, elaborates the principle and implementation of five fixed threshold algorithms and subband BER estimation algorithm, and adds adaptive coding to realize adaptive modulation and coding.)

说明：  给程序给出了功率放大器预失真过程中的时延同步问题。(This codes provides the time delay synchronization in the process of power amplifier predistortion.)

一个真正SERVER PUSH的聊天室，很不错，C语言所写，最可惜的是已经被编译过了，但是界面全部被独立出来了的，可以自行更改，只是不能研究程序的内部结构…… (a real SERVER PUSH chat rooms, very good, C language written, it is most unfortunate that has been compiled, but the interface were all independent of and can make changes, but the procedures are not able to study the internal structure of ...)

class ns-agent the default parameters

MATLAB环境下实现了基于Chase II译码算法的Turbo乘积码[TPC]译码的程序。(MATLAB-based implementation environment Chase II decoding algorithm of Turbo Product Code [TPC] decoding process.)

说明：  空域零陷，首先用doa技术估计直达波方向，然后置零，用于直达波消除。(In spatial nulling, DOA technique is used to estimate the direction of direct wave, and then zeroing is used to eliminate direct wave.)