OFDM

实现ldpc 编译码功能，并且输出BER和曲线图。(LDPC encoder and decoder)

Bit Error Rate analysis of an Extended Receiver for Rectangular PAM. The performance of a digital communication system in the presence of additive white Gaussian noise (AWGN) can be assessed by the measurement of the bit error rate (BER). The Simulink model provided is a rectangular polar pulse amplitude modulation (PAM) baseband system with an AWGN channel and an extended sample and hold receiver with a low pass filter. An extended receiver has an odd number of sample and hold circuits. What remains to be answered is if such a receiver would provide a more desirable BER than that of a simple S/H receiver.

CA 码的产生，以及自相关，互相关函数，画出自相关互相关图（MATLAB语句简单易懂，适合新手）(CA code generation, as well as autocorrelation, cross-correlation function, drawn from the correlation cross correlation diagram (MATLAB statement, easy to understand, suitable for novices))

web版微信协议分析。当前分析到登陆部分。举一反三，后续的拉取好友列表和发送消息等协议都好分析出来了。作者：孙强壮。(The web version of the micro-channel protocol analysis. Current analysis to the landing part. Giving top priority to, the subsequent pull friends list and send messages agreements out a good analysis.)

OFDM信道的参数估计模拟。QDPSK调制，采用训练信号。(OFDM channel estimation simulation.)

OFDM系统的自适应功率和比特分配算法，实现系统资源的自适应分配（4)－－原创(adaptive allocation for OFDM system)

说明：  TCP/ip通讯客户端的程序。VB程序编写WINSOCK控件应用(TCP/ip messaging client program. VB programming WINSOCK Control Applications)

说明：  document qpsk vhdl code

说明：  这个是64bit矩阵乘法实现代码，语言是verilog。(This is the 64 bit matrix multiplication implementation code, and the language is Verilog.)

说明：  OFDM通信系统的仿真代码，可用作数字通信的分析参考(The simulation code of OFDM communication system can be used as analysis reference of digital communication.)