1） 生成具有大小的LDPC奇偶校验矩阵。
2） 使用BF算法对使用1）生成的码字进行解码。
3） 给出解码算法在BPSK调制和AWGN信道下，信噪比为1、1.5、2、2.5、3db时的误码概率。
1)Generate a parity check matrix of LDPC with size .
2)Use the BF algorithm to decode a codeword generated by using 1).
3)Give the bit error probability of your decoding algorithm when the SNR is 1, 1.5, 2, 2.5, 3 dB with BPSK modulation and AWGN channels. (2020-12-17, matlab, 29KB, 下载5次)
OFDM系统仿真，多径和多普勒信道下的误码率随信噪比的变化
OFDM system simulation, the variation of bit error rate with SNR under multipath and Doppler channel (2020-12-01, matlab, 2KB, 下载9次)
实现认知无线电的基本算法，实现BPSK信号下的认知无线电检测，能够观测不同信噪比下的误码率，还能得到不同门限值下的误码率，实现miss理论和false理论的仿真。
Basic algorithms for implementing cognitive radio (2017-10-26, matlab, 2KB, 下载14次)
功率分配中的注水算法, 基本原理：
信噪比（即信号功率谱与噪声功率谱之和）为常数时，系统才能达到总信道容量最大的要求。
当SNR很大时，Pi等功率分配，注水算法功效消失。
在功率分配的问题中，只有满足注水定理时，才能达到信道容量最大化。
也就是说信噪比大的信道分得的功率多，信噪比小的信道分得的功率少。
使用拉格朗日乘子分配信道功率Pi使得信道容量最大。
The water fill algorithm for power allocation, basic principle:
When the SNR is a constant, the system will reach to the maximum demand of the aggregate channel capacity.
When the SNR is very big, the transmission power will be allocated equally and the water fill will loss efficiency.
In the power allocation problem, the capacity will be the maximum value only with the water fill is fulfilled. (2017-06-01, matlab, 2KB, 下载33次)
基于matlab/simulink的bpsk,qpsk经过白噪声信道和rayleigh多径误码率在不同信噪比下的计算，给出了对应的误码率曲线
Based on matlab/simulink bpsk, qpsk white noise channel and rayleigh multi-path error rate at different signal to noise ratio of the calculation, given the corresponding error rate curve (2017-05-25, matlab, 63KB, 下载28次)
基于CDMA扩频通信技术的仿真，采用的调制方法是GMSK调制，模拟信道噪声，输出信噪比，说明CDMA扩频通信的抗噪性
58/5000
Jīyú CDMA kuò pín tōngxìn jìshù de fǎngzhēn, cǎiyòng de tiáozhì fāngfǎ shì GMSK tiáozhì, mónǐ xìndào zàoshēng, shūchū xìn zào bǐ, shuōmíng CDMA kuò pín tōngxìn de kàng zào xìng
Based on the CDMA spread spectrum communication technology, the modulation method adopted is GMSK modulation, analog channel noise, output signal to noise ratio, which shows the noise immunity of CDMA spread spectrum communication (2017-04-22, matlab, 1KB, 下载10次)
基于CDMA扩频通信技术的仿真，采用的调制方法是DPSK，模拟信道噪声，输出信噪比，说明CDMA扩频通信的抗噪性
Based on the CDMA spread spectrum communication technology, the modulation method is DPSK, analog channel noise and output signal to noise ratio, which shows the noise immunity of CDMA spread spectrum communication (2017-04-22, matlab, 1KB, 下载5次)
mc-cdma的扩频，调制，加GI，通过瑞利信道 信噪比 误码率，去前缀，解调，解扩部分
mc-cdma spread spectrum modulation, plus GI, through the Rayleigh channel SNR BER, go prefix, demodulation, despreading section (2016-10-10, matlab, 2KB, 下载8次)
数字基带传输系统 代码 眼图 误码率
a=0.5 tao=Ts/2 phi=0。信噪比15，采样偏差0，滚余弦系数0.5，占空比0.5，
Digital baseband transmission system bit error rate of the code eye diagram a = 0.5 Tao = Ts/2 phi = 0. Signal-to-noise ratio 15, the sampling deviation, roll cosine coefficient of 0.5, duty cycle 0.5, (2013-04-24, matlab, 3KB, 下载12次)
对Schmidl&Cox算法的分析，提出了一种改进的定时同步方案。该方案
利用前导字的相关性，通过改进同步算法实现接收端的定时同步，在高斯信道和SUI一3信
道环境下进行仿真，结果表明：改进的定时同步方案优于传统方案，能取得良好的定时同步。
Schmidl & Cox analysis of algorithms, an improved timing synchronization scheme. The program draws on the leading word correlation, the receiving end of timing synchronization through improved synchronization algorithm, Gaussian channel and SUI-3 letter Road environment simulation results show that: improved timing synchronization scheme is better than traditional programs, can achieve good timing synchronization. (2013-04-18, matlab, 1KB, 下载33次)
传统的相控阵雷达，发射信号完全相关，通过对每个阵元加不同相移就可以改变波束的发射方向。以这种方式形成的波束通常主瓣较窄，信噪比比较高，若用于跟踪方向先验已知目标或只对空间某一窄的领域进行搜索时非常有利。本代码可以实现正交波束的形成.
Can realize orthogonal beam formation. (2012-12-20, matlab, 4KB, 下载53次)
用matlab编写的码率自匹配的联合信源信道编解码仿真平台。使用码率与信噪比自匹配的信道传输一张jpeg2000图片，信道编码方式为turbo码。
Joint source channel codec bit rate using matlab since matching simulation platform. Channel transmission bit rate and SNR since matching a jpeg2000 pictures, channel coding, turbo codes. (2012-07-17, matlab, 834KB, 下载90次)
Alamouti的架构 输出误码率 输入信噪比 针对两发两收的mimo系统
This is an Amamoudi scheme used in the 2x2 MIMO system. The output is the BER and input is SNR. (2012-03-04, matlab, 1KB, 下载7次)
turbo译码的bcjr译码算法仿真,顶层error_bit_rate_plot文件可以仿出1:20信噪比下的误比特率.
a bcjr arithmetic for the turbo decoding,the top error_bit_rate_plot file is for calculating the biterrs between 1 and 20 (2012-02-27, matlab, 3KB, 下载27次)
给出很详细的LTE中上行链路的SC-FDMA仿真信噪比，经验证可以运行。
Given in great detail LTE uplink SC-FDMA signal to noise ratio simulation, validated to run. (2011-12-15, matlab, 1KB, 下载20次)
无线通信技术的空时编码技术的代码，研究信号的信噪比，调高信道质量
This is a function that simulate the Alamouti Space-Time scheme and plot a BER vs SNR graph (2011-10-21, matlab, 12KB, 下载7次)
协作中继系统链路级仿真，里面对信噪比，误码率，BER性能仿真实现
Link Simulation cooperative relay system, which on the signal to noise ratio, bit error rate, BER Performance Simulation (2011-05-19, matlab, 267KB, 下载135次)
采用重要性采样的方法来代替蒙特卡罗仿真方法，确定数字通信系统的BER。重要性采样方法可以简单的增加信道噪声的方差，等效于使系统工作在一个较低的信噪比的环境下。
Using importance sampling method to replace the Monte Carlo simulation method to determine the digital communication system BER. Importance sampling method can be a simple increase in the variance of channel noise, is equivalent to make the system work in a lower signal to noise ratio environments. (2009-12-24, matlab, 5KB, 下载36次)
8单径瑞利信道中的四发四收V-BLAST：
(1) 请设计一种具体的导引辅助的信道估计方法，用Simulink进行仿真，测量16QPSK调制时的误码率性能。画出比特信噪比与信道估计均方误差的关系曲线，画出比特信噪比与误码率的关系曲线。
(2) 计算所设计方案的频谱效率是多少，单位为bit/Hz/s。
8 Single-Path Rayleigh Channel Four received four V-BLAST: (1) Please design a specific guide-assisted channel estimation method, using Simulink simulation, measurement 16QPSK modulation BER performance. Draw-bit signal to noise ratio and channel estimation mean square error curve, draw-bit signal to noise ratio and bit error rate curve. (2) calculate the design of spectrum efficiency is the number of units of bit/Hz/s. (2008-12-25, matlab, 10KB, 下载235次)
设定无线接入点能够始终提供最大吞吐量，终端节点的冗余通信模块各自的网络信道信噪比值随机变化，由此计算得冗余网络各自的CHF值。CHF切换机制根据冗余网络各自的采样值大小进行切换判决，考虑门限的CHF切换机制根据设定的上下切换门限值进行切换判决
Configure wireless access points can always provide the maximum throughput, end-node redundant network communication module respective channel signal to noise ratio value of random changes, which calculated the respective redundant network CHF values. CHF redundant network switching mechanism in accordance with their respective values of the size of the sampling switch decision, consider the threshold of CHF switch mechanism according to set upper and lower limit switch door switch decision (2008-07-16, matlab, 1KB, 下载40次)