chirpmodsys

说明：  跨平台即时通信技术在无线网络的研究与实现。(Cross-platform instant messaging technology in the wireless network and its implementation.)

产生16QAM信号，用平方根升余弦滤波器进行脉冲整形，平方根升余弦滤波器产生16-QAM波形波形，画出眼图(16QAM signal of pulse shaping by square root raised cosine filter, the square root raised cosine filter to generate 16-QAM waveform waveform, draw the eye)

matlab中离散信号小数点时延的实现算法,可以精确实现一段序列的延时(numerical time-delay)

该matlab程序比较相干波束成形，机会波束成形，基于球形量化的多用户波束成形的信道和容量性能(this matlab process compairs the interefer beamforming,oportunity beamforming and spherical quantitative beamforming performance)

calculating CRC from digital and analog input

对信号进行滤波，频谱分析，以及对滤波器的特性进行分析（基于labview的高级信号处理工具箱）(Filtering, spectrum analysis, and analysis of filter characteristics (advanced signal processing toolbox based on labview))

说明：  TCPIP在51单片机中的使用，一看就会，非常简单可靠实用(TCPIP )

说明：  cdma系统matlab仿真，在两个用户的背景下采用了直接扩频码实现扩频解扩，bpsk调制解调，程序已经运行过，没有问题！(Establishment of multipath channel model)

说明：  中兴h608b备份文件，usb口恢复超级管理员帐号(ZTE h608b backup file, usb super-administrator account to restore the mouth)

说明：  51单片机MODBUS主机通信程序，平台KEIL4。使用MODBUS SLAVE测试成功。(51 MCU MODBUS host communication program, platform KEIL4. The MODBUS SLAVE test was successful.)