psk

VB的CRC16校验源码，调试成功，程序简单。(The CRC16 checksum VB source code, debugging successful, the program simple.)

Pin configuration for hy-640 GSM module

说明：  TDMA的opnet仿真模型，比较简单，适合初学者(TDMA the OPNET simulation model is relatively simple, suitable for beginners)

此程序实现了稀疏傅里叶变换全过程,包括频谱重排，窗函数滤波，算法重构(it realizes the sparse fft)

dsp 28335 通讯例程，经检测可用，欢迎大家下载(DSP 28335 communication routines are available after testing. Welcome to download.)

说明：  本压缩包收集了较为经典的几种关于BCH和RS编译码的matlab程序，以及通信系统的仿真等。供大家参考学习，搬运整理而得(This compression package collects several classical matlab programs about BCH and RS coding and decoding, as well as the simulation of communication system. For your reference and study, handling and sorting out)

1. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请清楚的描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用S-function产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 (Doppler spectrum of radio channel 1, please answer the following questions (1) In some wireless channel, radio channel Doppler shift will cause the output signal aliasing. Please clearly describe aliasing for various reasons )

WAVECOM GSM MODEM用户中文使用说明书(WAVECOM GSM MODEM User Manual Chinese)

modbus 详细解说，协议文档。。。,包括了function。。。(modbus detailed explanation of the protocol documentation. . .)

针对胖AP和瘦AP，描述WLAN通信的过程(It describes the process of AP based on Wlan)