新建文件夹

仿真RFID通信 形成通信环路 在MATLAB下仿真(simulation of RFID communications)

说明：  MATLAB对语音信号加噪去噪处理，对语音信号进行高通、低通滤波(MATLAB adding noise to the speech signal denoising processing, speech signal high-pass, low-pass filtering)

GFSK调制通信系统误码率统计，非常有借鉴价值(GFSK modulation communication system bit error rate statistics, the very reference value)

自己搭建的基于转子磁链定向的异步电机间接矢量控制模型，采用带转矩内环的转速、磁链闭环控制。(vector control of IM.)

用于光伏灰尘处理问题聚类分析神经网络分析方法 matlab(Clustering analysis of photovoltaic dust disposal problems using neural network analysis method matlab)

说明：  对无线通信瑞利衰减信道进行建模的仿真代码，共有三种模型(Rayleigh channel simulation code)

说明：  基于esprit算法的宽带信号（线性调频信号）doa估计(DOA estimation based on esprit)

利用匹配追踪对雷达信号进行稀疏分解，得到其稀疏表示形式(The use of matching pursuit for sparse decomposition of the radar signals, by their sparse representation)

说明：  利用通信系统中调制信号的循环平稳特性,对频谱空洞进行检测,提升频谱感知技术在低信噪比下的性能。实验结果表明:与传统能量检测方法相比,采用循环特征检测方法改善了认知无线电中频谱空洞的检测能力。(Based on the cyclostationarity of modulation signals, spectrum hole is detected, aiming at the improve- ment of the performance of spectrum sensing in low SNR situation. The results show that comparing with the tra- ditional energy detection technique, cyclostationarity-based spectrum sensing technique has greatly improved the detective ability in cognitive radio.)

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。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 (On the wireless channel of the Doppler spectrum, please answer the following questions: (1) In some radio channels, the Doppler frequency shift will cause the output signal of the wireless channel aliasing. Please describe the aliasing produced a variety of reasons (2) wireless channel in the Doppler spectrum has a classical spectrum (classic spectrum), please explain the mechanism of produce such spectral shape (3), please use the Simulink tool to write code ( S-Function mode), resulting in a single-path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And requested the answer: that they used computer-generated classical spectrum is the right possible way.)