Message center and gateway mo

微软亚洲研究院论文：OFDMA 与OFDM/SDMA的性能比较-Microsoft Asia Research Institute Papers : OFDMA and OFDM/performance comparison SDMA

多线程串口程-multithread serial way

TGPS 控件是利用串行端口连接全球卫星定位系统设备 ( GPS ) 取得地理位置信息的控件 ( 1.04 版，Delphi 3.0/4.0/5.0/6.0 版适用 )，作者 : Lars Arvidsson。 -TGPS controls is to use a serial port to connect the global satellite positioning system (GPS) location information to obtain the control (1.04 version, Delphi 3.0/4.0/5.0/6.0 version of the application), the author: Lars Arvidsson.

P2P之UDP穿透NAT的原理与实现(附源代码).htm-P2P之UDP NAT htm

LTE上行随机接入过程第一步，在PRACH上发送preamble信号，接收端接收并进行相关峰检测其延迟。该文档为条件1200km/h速度下，系统带宽20MHz，采样率30.72MHz的情况下，未考虑多普勒频移，小区半径为30km的前导检测过程。

h.264编码器流程图，参考代码版本为jm61-h.264 encoder flowchart, reference code version jm61

射频卡读卡程序,射频IC卡识别技术，通常由载有密码的射频IC卡来代替传统的键盘密码。读卡模块读出密码后，即产生输出电信号，继而驱动执行机构动作，或将密码（如卡号）送给外围对接设备（如电脑或单片机等）。采用射频卡读卡模块及感应体构成的特定系统中，因射频卡内码信号唯一且不可复制，因此射频卡不仅杜绝了非法复制密码，还为各种控制采用信息化管理创造了条件。-RF card reader procedure, radio frequency identification technology IC cards, usually containing the password from the RF IC cards to replace the traditional keyboard password. Reader module read out a password, as a result, the output signal, and then drive the implementation agency action, or passwords (such as logging) gave the external docking equipment (such as computer or microcontroller, etc.). RF card reader module consisting of sensors and the specific system, RF signal code card but not the only copy, RF Card not only prevents illegal copying passwords, but also controls the use of information management to create the conditions.

通信系统仿真原理与无线应用代码 是一本不可多得的仿真书籍-Communication System Simulation Principle and wireless application code is a simulation of rare books

MATLAB与通信仿真 _ MATLAB与通信仿真-MATLAB simulation and communication

ModbusPoll 网上找的测试 Modbus协议，比较经典的版本，包含序列号发生器-ModbusPoll online test to find Modbus protocol to compare the classic version that contains the serial number generator