QC_codes

观察者模式实现各模块之间的异步通讯。模拟MFC消息(message router)

估计接收到的直扩信号的载频，码速率，以及扩频增益(Estimate the carrier frequency, code rate, and spread spectrum gain of the received DSS signals)

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.

说明：  matlab 波束形成的仿真，包含时域，频域，相移波束形成(Matlab beamforming simulation, including time domain, frequency domain, phase-shifted beamforming)

用VB编写的串口调试助手，附带51程序，大家可以学习，很经典，很地道(With VB serial debugging assistant, with 51 programs)

直接序列扩频通信中采用QPSK调制时，须将产生的串行数据首先串并变换成两路，本程序就是实现这种串并变换！(Direct sequence spread spectrum communications using QPSK modulation, it is necessary to have a string of serial data and converted into the first two, the process is to realize such a string, and transform!)

modbus rtu 校验vb源码，对VB学习者很有帮助(modbus rtu checksum vb source code, useful for VB learner)

S7-200以太网通讯图文教程 S7-200通过CP243-1或 CP243_1IT接入工业以太网。 S7-200以太网通信主要有以下几种方式： ★ S7-200之间的以太网通信 ★ S7-200与S7-300/400之间的以太网通信 ★ S7-200与OPC及WINCC的以太网通信 (S7-200 Ethernet communication graphic tutorial )

simulink搭建的卫星姿态动力学仿真，参考书籍是章仁为的卫星鬼道姿态动力学仿真，想学对卫星姿态有兴趣的同学强烈推荐，(simulink to build the satellite attitude dynamics simulation, reference books is Zhang Ren ghosts satellite attitude dynamics simulation, I wanted to learn for students interested in satellite attitude is strongly recommended,)

HT16C22显示驱动程序，使用I2C功能(HT16C22 display driver, using the I2C function)