通过分析2种经典室内无线射频识别定位方法 LANDMARC和VIRE,提出一种基于虚拟参考标签空间的定位方法。在定位区域中构建虚拟参考标签空间、实体参考标签和读写器结合的定位空间,并在采用K近邻方法进行定位坐标的计算中,引入Q-function计算每个邻居的权值,减小正态随机变量标准差带来的阴影效应。实验结果表明,该方法具有灵活的设备部署方式以及较高的定位精度。

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Research on Frequency-Hopping Spread Spectrum protocol with NRF24L01.zip

Distributed optical fiber Brillouin sensors detect the temperature and strain along a fiber according to the local Brillouin frequency shift (BFS), which is usually calculated by the measured Brillouin spectrum using Lorentzian curve fitting. In addition, cross-correlation, principal component analysis, and machine learning methods have been proposed for the more efficient extraction of BFS. However, existing methods only process the Brillouin spectrum individually, ignoring the correlation in t

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用matlab绘制频谱图，输入原始数据，计算信号频谱；分析频谱的代码

Deeply Recursive Low- and High-Frequency Fusing Networks for Single Image Super

Matlab仿真实现条带SAR频率变标成像算法，信号采用dechirp接收。下载之后运行FSA.m文件

频率计数器 计算一列中单词的出现频率