id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
fcis-30258	Long, Tianchen; Wang, Yanwen; Ma, Hongqing; Cai, Chang; Liu, Feng	Design of Unmanned Aerial Vehicle Frequency Hopping Communication System	2025	4	.pdf	application/pdf	2195	132	43	Time frequency analysis is divided into linear and nonlinear methods, such as short-time Fourier transform (STFT) and Gabor transform, which are suitable for linear correlation of signal components [5]; Nonlinear distributions such as Wigner distribution (WVD) and its derivatives are used for signals that do not satisfy linear correlation conditions, with high time-frequency resolution. The number of hopping frequencies reflects the number of carrier frequency changes and is positively correlated with anti-interference performance.	cache/fcis-30258.pdf	txt/fcis-30258.txt