Results 91 to 100 of about 3,627 (192)

Virtual Antenna Array and Fractional Fourier Transform-Based TOA Estimation for Wireless Positioning

Sensors, 2019
In this paper, a novel virtual antenna array and fractional Fourier transform (FRFT)-based 2-dimension super-resolution time-of-arrival (TOA) estimation algorithm for OFDM WLAN systems has been proposed.
Zhigang Chen, Lei Wang, Mengya Zhang
doaj   +1 more source

Optical Hyperspectral Image Cryptosystem Based on Affine Transform and Fractional Fourier Transform

Applied Sciences, 2019
An encryption algorithm for hyperspectral data in fractional Fourier domain is designed. Firstly, the original hyperspectral image is separated into single bands and then each pair of bands are regarded as the real and imaginary part of a complex ...
Hang Chen, Zhengjun Liu, Camel Tanougast, Jie Ding   +3 more
doaj   +1 more source

Joint Modulation Format Identification and Frequency Offset Estimation Based on Superimposed LFM Signal and FrFT

IEEE Photonics Journal, 2019
We propose a novel technique for joint modulation format identification and frequency offset (FO) estimation. The linear frequency modulation signal which is obtained by a direct current signal and Fractional Fourier Transform (FrFT) is superimposed on ...
Yuxiao Guo, Muguang Wang, Yaozu Li, Hongqian Mu, Beilei Wu, Yan Liu, Fengping Yan   +6 more
doaj   +1 more source

Hyperspectral Image Classification Based on Fractional Fourier Transform

Remote Sensing
To effectively utilize the rich spectral information of hyperspectral remote sensing images (HRSIs), the fractional Fourier transform (FRFT) feature of HRSIs is proposed to reflect the time-domain and frequency-domain characteristics of a spectral pixel ...
Jing Liu, Lina Lian, Yuanyuan Li, Yi Liu
doaj   +1 more source

Direction-of-Arrival Estimation for Wideband Chirps via Multi-Line Fitting in the Fractional Fourier Domain

IEEE Access
Estimating the direction-of-arrival (DoA) of a wideband chirp signal is an important topic in several modern systems. The referred estimation can be carried out using array signal processing in the fractional Fourier transform (FrFT) domain, which ...
Eulogio G. Huampo, Juliano B. Lima, Jose R. de Oliveira Neto   +2 more
doaj   +1 more source

Visualizing quantum states: A pilot study on problem solving in quantum information science education

Physical Review Physics Education Research
In the rapidly evolving interdisciplinary field of quantum information science and technology, a major obstacle is the need to understand advanced mathematics to solve complex problems.
Jonas Bley, Eva Rexigel, Alda Arias, Lars Krupp, Steffen Steinert, Nikolas Longen, Paul Lukowicz, Stefan Küchemann, Jochen Kuhn, Maximilian Kiefer-Emmanouilidis, Artur Widera   +10 more
doaj   +1 more source

Parameter Estimation of LFM Signals Based on PID-PSO-FRFT

Fractal and Fractional
The fractional Fourier transform (FRFT) serves as an effective tool for linear frequency modulated (LFM) signal parameter estimation, whose performance depends on the search efficiency for the optimal transform order.
Xuelian Liu, Tianhang Zhou, Yuchao Wang, Bo Xiao, Yani Chen, Chunyang Wang   +5 more
doaj   +1 more source

Physical Layer Authenticated Image Encryption for IoT Network Based on Biometric Chaotic Signature for MPFrFT OFDM System. [PDF]

Sensors (Basel), 2023
Hagras EAA, Aldosary S, Khaled H, Hassan TM.   +3 more
europepmc   +1 more source

Optimized SAR imaging algorithm with SSL constraints for the Azimuth direction. [PDF]

Sci Rep, 2023
Wang Z, Cai M, Wang Q, Chen X.
europepmc   +1 more source

Synchroextracting Transform Based on the Novel Short-Time Fractional Fourier Transform

Fractal and Fractional
As a generalization of the short-time Fourier transform (STFT), the novel short-time fractional Fourier transform (NSTFRFT) has been introduced recently.
Bei Li, Zhuosheng Zhang
doaj   +1 more source