stf

In recent years, the number of portable mobile terminal users is increasing with improvement of the wireless communication environment. In addition, mobile multimedia services also bring the increase of wireless traffic and lack of spectrum resources. As a technique for efficient spectrum use, spectrum sharing receives much attention. It dynamically assigns a spectrum channel from a larger area network such as WiMAX to smaller area networks such as WiFi-based wireless LANs and achieves to increase the total wireless communication capacity of this area. In a case where all providers are cooperative, the spectrum sharing can be realized easily and improve user throughput in average. In another case where providers are not cooperative, some spectrum trading methods based on auction theory had been proposed.

说明：  包含有数字通信课程实验大作业报告与代码。完成的OFDM的收发包含：1.卷积编码、2.自动增益控制、3.极大似然判决、4.QPSK收发、5.帧检测等，代码在MATLAB2016b环境下编译通过(It contains the report and code of the experiment assignment for the course of digital communication. The completed OFDM transceiver includes: 1. convolutional coding, 2. automatic gain control, 3. maximum likelihood decision, 4. QPSK transceiver, 5. frame detection, etc. The code is compiled and passed in MATLAB2016b environment.)

使用cordic算法，基于verilog实现的atan功能，经过仿真验证，适宜工程使用。(ATAN,implemented with cordic.)

resource allocation in cognitive radio

说明：  2*2 mimo系统在BPSK调制下ML，ZF，MMSE检测算法性能比较(Performance comparison of ML, ZF and MMSE detection algorithms for 2 * 2 MIMO system under BPSK modulation)

Optisystem的各大类的示例，适于初学者学习如何建立信号系统(Examples of various classes of Optisystem which are suitable for beginners to learn how to set up signal systems)

labwindows CVI 8.0 下调试通过的gprs，建立过程和udp通讯。(with labwindows cvi8.0,gprs connection had been programmed,and udp test is ok )

kd树，matlab源码 kd树，matlab源码(kdtree wiritten in matlab)

弯管机PLC程序，可以参考学习，结合自己使用的实际情况改设置就可使用。(The bending machine PLC program, you can refer to learning, combined with the actual situation of their use changed settings can be used.)

无线信道建模一直以来都很复杂，而且不同场景下的模型差异较大，这是一本专门讲解无线信道建模方法的书籍配套的matlab例程(Channel modeling has been very complex, and the model under different scenarios are quite different, which is the one devoted to channel modeling method books matching matlab routines)