Results 11 to 20 of about 3,627 (192)

Programmable photonic unitary circuits for light computing. [PDF]

Nanophotonics
Abstract Unitarity serves as a fundamental concept for characterizing linear and conservative wave phenomena in both classical and quantum systems. Developing platforms that perform unitary operations on light waves in a universal and programmable manner enables the emulation of complex light–matter interactions and the execution of general‐purpose ...
Kim K, Park K, Park H, Yu S, Park N, Piao X.   +5 more
europepmc   +2 more sources

Radar matched filtering using the fractional fourier transform [PDF]

, 2010
-A matched filter is the optimal linear filter for maximizing the signal to noise ratio (SNR) in the presence of additive noise. Matched filters are commonly used in radar systems where the transmitted signal is known and may be used as a replica to be ...
Clemente, Carmine, Elgamel, Sherif A.E.H., Soraghan, J.J.   +2 more
core   +1 more source

Parametric Decomposition of Pulsed Lidar Signals with Noise Corruption Using FRFT Spectrum Analysis

Remote Sensing, 2021
The parametric decomposition of full-waveform Lidar data is challenging when faced with heavy noise scenarios. In this paper, we report a fractional Fourier transform (FRFT)-based approach for accurate parametric decomposition of pulsed Lidar signals ...
Fan Xu, Jun Chen, Ya Liu, Qihui Wu, Xiaofei Zhang, Zhengyang Shu   +5 more
doaj   +1 more source

Separation of Overlapping Linear Frequency Modulated (LFM) Signals Using the Fractional Fourier Transform [PDF]

, 2010
Linear frequency modulated (LFM) excitation combined with pulse compression provides an increase in SNR at the receiver. LFM signals are of longer duration than pulsed signals of the same bandwidth; consequently, in many practical situations, maintaining
Cowell, DMJ, Freear, S
core   +1 more source

Frequency‐to‐spectrum mapping GAN for semisupervised hyperspectral anomaly detection

CAAI Transactions on Intelligence Technology, Volume 8, Issue 4, Page 1258-1273, December 2023., 2023
Abstract Most unsupervised or semisupervised hyperspectral anomaly detection (HAD) methods train background reconstruction models in the original spectral domain. However, due to the noise and spatial resolution limitations, there may be a lack of discrimination between backgrounds and anomalies.
Degang Wang, Lianru Gao, Ying Qu, Xu Sun, Wenzhi Liao   +4 more
wiley   +1 more source

Fractional fourier transform based monopulse radar for combating jamming interference [PDF]

, 2010
Monopulse radars are used to track a target that appears in the look direction beam width. The distortion produced when manmade high power interference (jamming).
Elgamel, Sherif A.E.H., Soraghan, J.J.
core   +1 more source

Anti‐interrupted sampling repeater jamming method for random pulse repetition interval and intra‐pulse frequency agile radar

IET Radar, Sonar &Navigation, Volume 17, Issue 12, Page 1796-1811, December 2023., 2023
This paper proposes a random pulse repetition interval and intra‐pulse frequency agile radar waveform and captures the range‐dimensional centroid feature of the echo. Accordingly, a jamming identification method based on the scale constrained Gaussian mixture model (SCGMM) and an entity radar target energy recovery algorithm based on the neighbourhood ...
Tai Guo, Haihong Zhan, Xingde Su, Tao Wang   +3 more
wiley   +1 more source

Oncogenomic profiling in infant-toddler T-ALL identifies NKX2 family genes as drivers linked to favorable outcomes. [PDF]

Hemasphere
Abstract T‐cell acute lymphoblastic leukemia (T‐ALL) is a rare and aggressive hematological malignancy primarily affecting adolescents and young adults and is scarce in infants and toddlers under age 3. Unlike B‐ALL, T‐ALL in this young population remains poorly characterized due to limited data and lacks evidence‐based guidelines to help clinicians ...
Delafoy M, Balducci E, Simonin M, Pinton A, Charbonnier G, Courtois L, Lhermitte L, Gillet C, Féroul M, Touzart A, Cieslak A, Smith C, Courgeon M, Wiber M, Mercher T, Latour S, Arnoux I, Saultier P, Rohrlich PS, Bodet D, Grardel N, Lubnau M, Pellier I, Thouvenin S, Garnier N, Pastoret C, Brethon B, Petit A, Macintyre E, Baruchel A, Asnafi V.   +30 more
europepmc   +2 more sources

Direction of arrival estimation based on slope fitting of wideband array signal in fractional Fourier transform domain

IET Radar, Sonar & Navigation, 2023
Traditional direction of arrival (DOA) estimation methods of wideband linear frequency modulated (LFM) signal based on the fractional Fourier transform (FRFT) highly depend on the peak value of LFM signal in the FRFT domain.
Jun Zhong, Tingting Chen, Fei Peng, Xiaowen Bi, Zhong Chen   +4 more
doaj   +1 more source

Separation of Two-Dimensional Mixed Circular Fringe Patterns Based on Spectral Projection Property in Fractional Fourier Transform Domain

Applied Sciences, 2021
In this paper, a method for automatically separating the mixed circular fringe patterns based on the fractional Fourier transform (FrFT) analysis is proposed.
Hsuan-Ting Chang, Tzu-Yao Lin, Chih-Hao Chuang, Chien-Yu Chen, Chian C. Ho, Chuan-Yu Chang   +5 more
doaj   +1 more source