ABSTRACT
It is time-consuming to simulate the unmanned aerial vehicle (UAV) swarm by the Multi-Level Fast Multipole Algorithm (MLFMA). This paper proposes a method to accelerate the simulation by neglecting the coupling among UAVs and computing the scattered field by Spherical Harmonic Transform (SHT). The key point is evaluating the scattered electric field of a UAV on an eccentric sphere by changing the order of summation of the spherical harmonics and then accelerating the summation by Fast Fourier Transform (FFT). The example of a swarm of 6 UAVs shows that the bistatic Radar Cross Section (RCS) obtained by the proposed method is in good agreement with the RCS obtained by MLFMA, and the proposed method requires 4.76 times less memory and is 10.93 times faster than MLFMA.
Data availability
Regarding the raw data of the far-field RCS used in the fourth chapter of the paper, I have explained the website at https://figshare.com/s/df680dd779f1939f3ae6, doi: 10.6084/m9.figshare.13251407. These data is the data contains a total of four pictures, they are , , , .
UAV data and current procedures cannot be shared at this time, because these data also form part of ongoing research.
Disclosure statement
Authors have no conflict of interest to declare
Funding
This work was sponsored by the Natural Science Basic Research Program of Shaanxi (No.2021JM-129).