qpsk-modelation

DRM(Digital Radio Mondiale)系统采用OFDM调制方式， 引入了先进的信源信道编码和调制技术，使得AM波段的音频广播质量大大提高，在保持现有10kHz带宽时接近了FM广播的质量[5](DRM (Digital Radio Mondiale) system uses OFDM modulation, the introduction of advanced source-channel coding and modulation techniques, making AM-band audio broadcast quality greatly improved, while maintaining the existing 10kHz bandwidth close to the quality of FM broadcasting [5])

OPC Client和OPC Server的工具和一些帮助，(OPC Client and OPC Server tools and some help)

lfm信号及模糊度函数,等高线图，时间分辨力 频率分辨力(lfm signal and ambiguity function, contour map, time resolution, frequency resolution)

说明：  最基础的检测概率；虚警概率；漏检概率与门限的关系。(Energy detection;Single threshold.)

说明：  2. 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Simulink工具编写代码(S-Function方式)，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。并请描述：自己用计算机产生的经典谱是正确的依据。(2. Regarding the doppler spectrum of the wireless channel, please answer the following questions: (1) in some wireless channels, doppler frequency shift will cause aliasing of the output signals of the wireless channel.Describe the various causes of aliasing; (2) there is a classic spectrum in the doppler spectrum in the wireless channel, please explain the mechanism of producing this spectrum shape; (3) please use Simulink tool to write code (s-function mode) to generate a single-path Rayleigh channel, whose doppler spectrum is the classical spectrum, in which the moving rate is 120km/h.And please describe: your own computer generated classical spectrum is the correct basis.)

二进制格雷码与自然二进制码的互换 它就是介绍怎么把二进制格雷码与自然二进制码的互换。主要是异或操作(itis to for 2to 2)

IEEE TRANSACTIONS ON SIGNAL PROCESSING在定位与跟踪领域的经典文献“Source Localization Using TDOA and FDOA Measurements in the Presence of Receiver Location Errors: Analysis and Solution”的PDF文档，此文档的MATLAB程序同时上传，进行信号源被动定位与跟踪研究的同学可下载使用！(IEEE TRANSACTIONS ON SIGNAL PROCESSING positioning and tracking in the field of classical literature " Source Localization Using TDOA and FDOA Measurements in the Presence of Receiver Location Errors: Analysis and Solution" of the PDF document, this document also upload the MATLAB program, the source passive positioning and tracking of students can download!)

说明：  正交频分复用（OFDM）信号的互补累计函数(ccdf_of_clipped_foltered_ofdm_signal)

这是一个将语音信号通过PCM编码传输的仿真测试程序，内有详细注释，希望对大家有用。(This is a voice signal transmission through the PCM coded simulation testing procedures, with detailed notes, We hope that the right useful.)

电力线信道模型下OFDM通信系统的Simulink仿真研究，值得大家参考(Power line channel model Simulink Simulation of the OFDM communication system, it is worth reference)