LDPC

通过伪随机序列进行频率调制，并对相位连续性进行优化。调制信号的自相关函数可以通过谱修正进行旁瓣抑制(Frequency modulation is performed by pseudo-random sequence and phase continuity is optimized. The autocorrelation function of modulation signals can be sidelobe suppressed by spectral correction)

ofdm/oqam系统源码 4qam调制下oqam与cp——ofdm比较(ofdm/oqam system source code modulation oqam 4qam with cp- ofdm Compare)

简单的MIMO模拟 假定QPSK，ML解码（SM ZF检测器除外）。 mrc.m - 最大比例组合 stc.m - 具有1和2个接收天线的Alamouti空时分组码 bf.m - 特征波束形成 sm.m - 空间复用2x2（ML解码和次优逼迫） 简单的OFDM仿真 模拟保护带，用于信道估计的循环前缀前导码符号(Simple MIMO simulations Assumes QPSK, ML decoding (except SM ZF detector). mrc.m - maximal ratio combining stc.m - Alamouti space-time block code with 1 and 2 receive antennas bf.m - Eigen-beamforming sm.m - Spatial multiplexing 2x2 (both ML decoding and suboptimal zero forcing) Simple OFDM simulation Simulates guard band, cylic prefix Preamble symbol used for channel estimation)

说明：  以均匀圆阵为例，通过功率倒置算法，使特定方向上的天线增益最大，已达到波束成形，空域滤波的目的 参考文献《GNSS空域抗干扰算法研究及FPGA实现》(Research on Spatial Anti-jamming Algorithms of GNSS and FPGA Implementation)

《光通信系统》的电子文档，对于学习光纤通信的人有很大的帮助。(The optical communication system, "the electronic document, for learning optical fiber has a lot of help.)

说明：  A Study on OFDM Mobile Radio Transmission Scheme with Adaptive Guard Interval Length

MIMO系统中基于压缩感知的有限反馈方法研究,D对研究有限反馈有很好的帮助。(MIMO systems with limited feedback based compressive sensing method study, D finite feedback of good help.)

给任意IP地址发送一个欺骗icmp包,发送方的IP地址和MAC地址可以随意填写(To deceive any IP address to send a icmp packet, the sender' s IP address and MAC address can be free to fill)

数字通信技术的收集与介绍 希望对大家有用( Communicate)

说明：  一个C++的简单的原代码,可以提供学习比较好,大家可以下了(C of a simple code, can provide a better learning, we can go down)