polyadd

此代码为RFID中防冲突算法中的固定帧ALOHA算法的仿真(this code for RFID defense algorithm conflict fixed frame ALOHA Simulation Algorithm)

共振解调技术是经过包络分析将淹没在背景噪声中的微弱信号提取出来，然后输出一个消除了振动信号干扰的信号，接着对该信号进行频谱分析，并且通过利用滚动轴承的故障特征频率进行分析，共振解调法是目前应用于实际的常用方法。(The resonance demodulation technique is to extract the faint signal submerged in the background noise by envelope analysis, and then output a signal that eliminates the interference of the vibration signal. Then the signal is analyzed and analyzed by the frequency of the fault characteristic of the rolling bearing. The resonance demodulation method is applied to the actual situation at present. The commonly used methods.)

说明：  simulink搭建滑模观测器，并检测出故障，对故障鲁棒，具有较好的检测效果。(Simlink builds sliding mode observer and detects faults. It is robust to faults and has good detection effect.)

基于DSP2812的PWM整流程序，为设计变频器或者PWM整流器的电气工程师提供PWM波形形成程序。(Electrical engineer for the design of the inverter or PWM rectifier the DSP2812 based PWM rectifier procedures, the PWM waveform to form a program.)

说明：  实现了数字上变频DUC，模拟仿真了数字上变频的实现原理，仅供参考(The digital up conversion Duc is realized, and the realization principle of digital up conversion is simulated, which is only for reference)

采用QPSK调制方式实现OFDM，在simulink上搭建的仿真模块，可以很好的学习OFDM，验证通过。(Achieved using QPSK modulation OFDM, built on the simulink simulation module can be good learning OFDM. )

九轴姿态解算，数据代码都有，可运行实测；很好运行(Nine axis attitude calculation, data codes are available, can be measured and run well.)

说明：  论文——基于特征分解的GFDM实现无ICI、ISI干扰和导频插入用于信道估计的仿真代码(Thesis: the implementation of gfdm based on feature decomposition without ICI, ISI interference and pilot insertion simulation code for channel estimation)

分别上传了多天线系统中的SISO，SIMO，MISO以及MIMO模型仿真程序，对比了不同模型的容量。还有最优算法与最大范数算法的误码率比较程序。很实用！(Upload four system model,SISO SIMO MISO and MIMO,respectively.And compare their capacity.In addition,a BER program is also uploaded based on optimal algorithm and maximum norms)

不同信号的循环谱（AM,BPSK,BFSK,DME等）可以直接使用，来分析信号的循环平稳特性。(The cyclic spectrum of different signals (AM, BPSK, BFSK, DME, etc.) can be directly used to analyze the cyclostationary characteristics of signals.)