The angular spectrum technique, has been used, with two fast Fourier transformations applied, which turns out to be accurate and fast. The results were simulated with the help of a dedicated computational program written in Borland C++Builder and Matlab software. Some numerical simulation examples ...
Fig.1 Schematic diagram of angular spectrum diffraction 取样间隔 啄 1 满足的条件为: 姿z D 2 +D 1 ≤啄 1 ≤ 姿z D 2 -D 1 6) 已知傅里叶变换会将输入函数进行周期性的延 拓, 为了避免虚拟的输入面影响 D 2 面上的成像,设 衍射平面上数值模拟范围为 x 2 ,且 x 2 大于D 2 对D 1 2936...
Orbital angular momentum (OAM) of different modes, as an inherent property of electromagnetic waves, can be theoretically multiplexed in an infinite orthogonal channel at a single frequency, which greatly alleviates the scarcity of radio spectrum resources1,2. Due to its helical phase front, electrom...
The sampled data are input to a computer where the interpolation is performed using MATLAB. Afterwards, the interpolated data are output to a spectrum analyser (Agilent E4446A) for observation. (b) OAM mode detection experiment conducted in the laboratory. (c) Transmitting antenna fabricated by ...
R Zhang, YC Liang, Exploiting multi-antennas for opportunistic spectrum sharing in cognitive radio networks. IEEE J. Sel. Topics Signal Process. 2(1), 88–102 (2008) 60. Y Nesterov, A Nemirovski, Interior-point polynomial algorithms in convex programming: theory and applications. (Philadelphia...
·tion || ‚fæbrɪ'keɪʃn] n.制作; 伪造物; 构成epitaxial[ˏepɪˋtæksɪəl]外延的render[ˈrendə]vt.使得,致使;给予,提供;翻译magnetic field磁场spectrum[spec·trum || 'spektrəm]n.谱; 频谱; 光谱; 射频频谱the quenching of the orbital momentum轨道动量的淬灭...
Fig.1 Schematic diagram of angular spectrum diffraction 取样间隔 啄 1 满足的条件为: 姿z D 2 +D 1 ≤啄 1 ≤ 姿z D 2 -D 1 6) 已知傅里叶变换会将输入函数进行周期性的延 拓, 为了避免虚拟的输入面影响 D 2 面上的成像,设 衍射平面上数值模拟范围为 x 2 ,且 x 2 大于D 2 对D 1 2936...
Then, the frequency spectrum of the captured raw RF signal is calculated based on STFT. Next, the 1D frequency spectrum series is converted into 2D images through FDGAF transform. Finally, the obtained images are used for CNN training and testing. Figure 1. The drone classification framework ...