ECA_RD_DRM

这是一个CD4067B的技术资料，希望对大家有帮助。(This is a CD4067B technical information, we hope to help.)

OPNET上实现的原码，与卫星通信有关，有兴趣的可以下载(OPNET to achieve the original code, relating to satellite communications, are interested in can be downloaded)

基于梳状导频的OFDM信道估计中LS算法的测试程序(LS algorithm testing program based on the the comb pilot of OFDM channel estimation)

用C#语言实现OPC客户端的功能，客户端扫描目标机可连接的OPC Server，选择后完成连接。(This is a sample for opc client which is complied by C#.This clien can browse the opc server from the object PC.The user connect the opc server by selecting.)

说明：  基带信号bpsk仿真，基带传输基本方波信号、sinc信号，对过程添加高斯白噪声，接收端用匹配滤波器进行接受，计算实际信号误码率，并于理论误码率进行比较(BPSK simulation of baseband signal. Baseband transmits basic square wave signal and sinc signal. Gaussian white noise is added to the process. Matched filter is used to receive the received signal. The error rate of actual signal is calculated and compared with the theoretical error rate)

在D2D模型中使用图着色方法进行仿真的程序(Programs that use the graph coloring method for simulation in the D2D model)

This is ieee paper describes OFDM radar implementation, good for study and understanding

说明：  对当前通信信号中常用的数字调相信号BPSK、QPSK、1／4一QPSK、8PSK的调制识别问题，提出了一种基于信号差分高阶累积量的识剐算法。该算法分两个层次进行调制识别，首先利用信号的四阶累积量特征对BPSK、QPSK和{1／4一QPSK、8PSK}信号进行识别，然后再利用信号差分的四阶和八阶累积量特征对1/4-QPSK、8PSK信号进行识别。从理论上分析了的该算法的有效性，并通过计算机仿真验证了算法具有良好的性能。(A recognition algorithm based on differential high-order cumulant is proposed for the modulation recognition problems of BPSK, QPSK, 1/4-QPSK and 8PSK, which are commonly used in current communication signals. The algorithm is divided into two levels for modulation recognition. Firstly, BPSK, QPSK and {1/4-QPSK, 8PSK} signals are identified by using the fourth-order cumulant characteristics of signals, and then 1/4-QPSK and 8PSK signals are identified by using the fourth-order cumulant and eighth-order cumulant characteristics of signal difference. The validity of the algorithm is analyzed theoretically, and the good performance of the algorithm is verified by computer simulation.)

这是自由空间路径损耗的代码。里面有多个m文件(This is the code of path loss in free space. There are multiple M files in it.)

TD-LTE下行传输采用了MIMO-OFDM的物理层构架，通过最多4个发射天线并行传输多个（最多4个）数据流，能够有效地提高峰值传输速率。LTE的物理层处理过程中，预编码是其核心功能模块，物理下行共享信道的几种主要传输模式都是通过预编码实现的。(The td-scdma LTE downlink transmission adopted MIMO - OFDM frame, the physical transmission antennas parallel transmission by up to four more (up to 4) data flow, can effectively improve the peak transmission rate.LTE) in the process of the physical layer of precoding is its core function module, several kinds of main physical downlink Shared channel transmission model is achieved by precoding.)