CommunicationSystem

说明：  实现UWB仿真，用于实现自动追踪定位，即卡尔曼滤波算法(Implement UWB simulation for automatic tracking and positioning, namely Kalman filter algorithm)

Abstract—In this paper, we study the joint estimation of inphase and quadrature-phase (I/Q) imbalance, carrier frequency offset (CFO), and channel response for multiple-input multipleoutput (MIMO) orthogonal frequency division multiplexing (OFDM) systems using training sequences. A new concept called channel residual energy (CRE) is introduced. We show that by minimizing the CRE, we can jointly estimate the I/Q imbalance and CFO without knowing the channel response. The proposed method needs only one OFDM block for training and the training symbols can be arbitrary. Moreover when the training block consists of two repeated sequences, a low complexity two-step approach is proposed to solve the joint estimation problem. Simulation results show that the mean-squared error (MSE) of the proposed method is close to the Cramer-Rao bound (CRB). Index Terms—MIMO OFDM, CFO, I/Q imbalance, channel estimation.

QT环境下开发的，用于测试电力通讯规约IEC103的一个程序(QT development environment for the testing of electrical communications statute a procedure IEC103)

本章介绍了用于WAN(广域网)环境的各种协议和技术。在这里概述的题目包括点对点链路，电路交换，分组包交换，虚电路，拨号服务，和WAN设备。在手册第3部分,‘WAN协议’,的各章里将更详细地讲述专门技术。 ( This article introduces the various protocols and technologies used in wide-area network (WAN) environments. Topics summarized here include point-to-point links, circuit switching, packet switching, virtual circuits, dialup services, and WAN devices. Chapters in Part 3, “WAN Protocols,” address specific technologies in more detail. )

说明：  整个仿真系统是从发射端、瑞利信道、接收端大致的过程(The entire simulation system is a rough process from the transmitter, the Rayleigh channel, and the receiver)

this is simply a report on the fading channel on different modulation scheme

收发传真，浏览传真的程序(A program which receive、send and scan fax)

说明：  对数字信号进行相位幅度调制，并在接收端成功解调(QAM of Digital Signal and Successful Demodulation at Receiver)

基于opnet的Ad hoc网络业务量特性研究。(OPNET based on the Ad hoc network characteristics of the volume of business.)

说明：  智能汽车和智能交通的关键技术，V2X（车联网）无线资源分配(The key technology of intelligent vehicle and intelligent transportation, v2x (Internet of vehicles) wireless resource allocation)