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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.)

数字通信原理是一门学习通信原理的重要的基础课程，该ppt讲述了通信原理的基础知识，适合初学者(Principles of digital communication is an important principle of learning communication basic course, the ppt about the basic knowledge of communication principles, suitable for beginners)

说明：  To completely remove inter-cell interference, SIC is applied by the receivers at the user side. The technology can separate these data streams for corresponding users The interference cancellation technology is of importance for hybrid unicast/multicast service system performance

在三条径的瑞利信道中，对于直接序列扩频： (1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，测量BPSK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，请解释在误码率为0.01时，两种合并方式所表现的不同的物理意义。 (2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真(自己编写代码S-Function方式)，分析所设计方案的时间同步精度，画出比特信噪比与捕获概率的关系曲线。 (3) 设时间已经同步，请设计DS-CDMA一种具体的频率方法，用Simulink进行仿真(自己编写代码S-Function方式)，画出比特信噪比与频率同步误差的关系曲线。 (err)

说明：  在matlab环境下,仿真基于循环平稳特征检测的频谱感知,(Spectral sensing based on cyclic stationary feature detection)

说明：  OFDM仿真，包括仿真图，功率谱，星座图等(OFDM simulation, including simulation diagram, power spectrum, constellation diagram, etc.)

comparison of BER performance for mapping of turbo coding with 16QAM 64QAM 128QAM

朋友写的C++645通讯程序，支持645-1997与645-2007,支持自已组帧程序自动添加校验码通讯，可以增加数据标识定义，里面还有部分关于费控通讯代码，挺好，拿来分享(Friend write C++645 communications program to support the 645-1997 and 645-2007, to support their own group the frame program automatically adds the checksum communications, can increase data identifies the definition, there is also a section on the fee control communications code, good for them and share)

turbo码BPSK仿真,对全matlab 程序,()

说明：  LMS自适应信道均衡程序以及学习曲线绘制，程序为matlab代码。(LMS adaptive channel equalization process and the learning curve drawing, procedures for the matlab code.)