该平台旨在帮助远程自由职业者在线找到工作，并帮助企业家找到可靠的认证自由职业者。，
A platform built to help remote freelancers find a job online and entrepreneur find a reliable, certified freelancer., (2018-10-29, Others, 0KB, 下载0次)
“意识形态极化预测对新冠肺炎-19小企业救济分配公平性的看法”的复制代码，
Replication code for "Ideological Polarization Predicts Perceptions of the Fairness of COVID-19 Small Business Relief Allocations", (2021-07-29, HTML, 0KB, 下载0次)
基于手机实现的的4G代理应用,使用 python 开发,拿来即用的企业级代理服务。
4G proxy applications based on mobile phones are developed in python and are enterprise class proxy services ready for use. (2022-05-13, Python, 746KB, 下载0次)
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)
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)
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)
3GPP LTE使用的信道仿真模型，目前在3GPP中的提案均使用这一种信道道模型，源码是经过国外著名大学与公司联合完成的，极具珍藏价值。 可直接使用。
3GPP LTE channel simulation model, the current proposal in 3GPP use this kind letter Daodao models, the source is famous overseas universities and companies jointly completed the great commemorative value. Can be used directly. (2012-09-15, Visual C++, 48KB, 下载8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)
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)
3G 长期演进技术的LTE里边Turbo编解码，信道模拟，信噪比分析等
3G Long Term Evolution LTE technology inside Turbo decoding, channel modeling, signal to noise ratio analysis (2010-05-27, C/C++, 6KB, 下载118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)