xiaobofenximaoyaobing

文章讲述了现在韩国的频谱政策和动态频谱接入技术。过去韩国的频谱管理政策需要特权，并且只有一小部分频谱可以公用。随着无线技术的发展，现在，韩国政府，使用了机遇动态频谱接入的新型频谱策略，例如LBT技术用于REID，UWB和FACS等。MIC还考虑如何在DTV过渡完成后，重新分配频谱。新型的无线电技术如认知无线电和SDR将在UHF边带中应用新的服务。MIC试图用一用有效地方式开放频谱并接受新技术用于频谱策略中。(In this paper, we introduce spectrum policies and dynamic spectrum access technologies in Korea. In the past, Korea spectrum management was the command and control with exclusive usage rights and small portions of spectrum commons bands. With the development of the radio technologies, Recently, Korea government, MIC(ministry of information and com- munication), has been adopting new spectrum policies based on dynamic spectrum access technology such as LBT(Listen Before Talk) for RFID, UWB, and FACS(Flexible Access Common Spectrum) etc. MIC is also considering spectrum reallocation of digital dividend bands after DTV transition. New radio techniques such as cognitive radio and SDR will be applied to new services in this UHF band. MIC is trying to open the radio spectrum in an efficient way and adopt new technology into spectrum policy. Thus MIC is extending the open spectrum such as spectrum commons and spectrum liberalization bands. )

使用传输零点，综合低通原型滤波器的P，F，E函数，用以得到S参数(synthesis F P E functions to obtain S parameters by using transmission zeros)

说明：  一、 简介 本仿真软件可以仿真波片对偏振光的相位调制过程。用户可以通过改变波片的类型，波片长轴与X轴的夹角，起偏器透光与X轴的夹角，检偏器透光轴与X轴的夹角等参数，来观察屏上光强及透过波片后的偏振光的信息。 建议在Matlab2008a或以上平台上运行本软件。 (I. Introduction The simulation software can simulate wave plate for polarization phase modulation process. Users can change the type of wave plate, wave plate angle between the long axis and the X-axis, from the transmission side device and the X-axis angle, the transmission axis of the polarizer angle between the X-axis parameters to the viewing screen glazing strong and polarized light through the wave plate information. Recommended Matlab2008a or run the software on the platform above.)

说明：  通过若干个例子实现newton hss算法，包括确定最优参数的脚本。(Newton HSS iteration method)

说明：  主动声呐匹配场计算程序matlab程序包(Calculation program of active sonar matching field)

说明：  polar code implemnted in matlab

simulates the MPPT algorithm using PSO

说明：  基于MATLAB的布莱克曼窗法带通滤波设计(The Blackman window method based on MATLAB bandpass filter design)

基于matlab求解公切线，使用了网络搜索法(Based on matlab solving common tangent, using a web search method)

该程序是通过MATLAB平台作出的修正型平面二次包络蜗杆的仿真图.(The program is made through the MATLAB platform modified Planar Double-Enveloping Worm Simulation Fig.)