sivSimulaoion

(1)建立DQPSK调制和解调 SIMULINK仿真模型，评估其在AWGN信道和瑞利衰落信道下的误码率性能（画出信噪比变化时的误码率曲线）； (2)基于（1）建立的SIMULINK仿真模型，分别在AWGN信道和瑞利衰落信道下发送一个实际音频文件，在接收端实时播放出来((1) the DQPSK modulation and demodulation SIMULINK simulation model is established to evaluate the bit error rate performance under the AWGN channel and the Rayleigh fading channel (the bit error rate curve when the signal to noise ratio changes). (2) based on the (1) established SIMULINK simulation model, a real audio file is sent under the AWGN channel and the Rayleigh fading channel respectively, and it is played on the receiving end in real time.)

这是三边滤波器算法实现的有关工具，主要用来实现图像降噪等有关应用(This is the trilateral filter algorithm of the tool, mainly used for applications such as image denoising)

说明：  Pywavelets的cwt函数做连续1维小波变换的时频分析，并图形显示(Time and Frequency of Continuous 1-D Wavelet Transform and Graphic Display)

说明：  matlab的bpsk，qpsk，msk，qam打包下载，不是自带的程序函数。按照通信框图做的程序(MATLAB，bpsk，qpsk，msk，qam)

仿真分析了步进频率雷达信号的波形频谱和模糊函数(The waveform spectrum and ambiguity function of stepped frequency radar signal are simulated and analyzed.)

技术文档：OFDM联合极大似然法，符号和载波频偏估计，利用循环前缀的冗余信息实现ML估计，不需额外插入导频，其频率估计用于跟踪模式，时间估计用于捕获模式。(OFDM ML estimator for time and frequency)

本程序通过分析OFDM信号的循环平稳特性，利用循环谱对OFDM信道进行估计。(This procedure by analyzing the OFDM signal is cyclostationary properties, the use of cyclic spectrum of the OFDM channel estimation.)

说明：  mimo各个信道具体源码，包括高斯、瑞利、多径衰弱等信道模型，本人将其调试、整理并附上运行结果。(MIMO channel specific source code, including Gaussian, Rayleigh, multipath fading and other channel models, I will debug, collate and attach the operation results.)

说明：  智能语音小车标准程序，已经测试通过了的。完全没有问题。(The standard program of intelligent voice car has passed the test. No problem at all.)

很久很久之前，收藏的一份 清华大学 p2p相关的研究文献，希望对有需要的人有帮助，非常难得(Long, long ago, a collection of P2P-related research literature collected by Tsinghua University, hoping to help people in need, is very rare.)