Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Chamith Wijenayake"'
Publikováno v:
Journal of Low Power Electronics and Applications, Vol 14, Iss 2, p 26 (2024)
A low-complexity multibeam wideband transmit beamformer using a 2D sparse FIR filter design capable of multiple beams is proposed as a digital building block for fully digital beamformers. The 2D sparse FIR filter has multiple trapezoid-shaped passba
Externí odkaz:
https://doaj.org/article/633dcabdc40946fb80dbe1cf42ae3596
Autor:
Namalka Liyanage, Chamith Wijenayake, Len T. Bruton, J. T. Vorhies, S. Premaratne, Chamira U. S. Edussooriya, Arjuna Madanayake, Panajotis Agathoklis, Donald G. Dansereau
Publikováno v:
IEEE Transactions on Circuits and Systems II: Express Briefs. 68:2735-2741
Light fields (LFs) and light field videos (LFVs) capture both angular and spatial variation of light rays emanating from scenes. This richness of information leads to novel applications such as post-capture refocusing, depth estimation and depth-velo
Autor:
Darukeesan Pakiyarajah, Nadeeshan D. K. Dissanayake, Chamira U. S. Edussooriya, Chamith Wijenayake, Arjuna MadanayakeS
Publikováno v:
2022 IEEE International Symposium on Circuits and Systems (ISCAS).
Autor:
Donald G. Dansereau, Chamira U. S. Edussooriya, Chamith Wijenayake, Sai K. Gullapalli, Len T. Bruton, Arjuna Madanayake
Publikováno v:
Multidimensional Systems and Signal Processing. 32:607-631
In four-dimensional (4-D) light field (LF) processing, 4-D linear shift-invariant filters having hyperplanar passbands are used for depth-based scene enhancement. In this paper, two low-sensitivity and low-complexity field programmable gate array (FP
Publikováno v:
IEEE Transactions on Circuits and Systems I: Regular Papers. 67:2693-2706
Four-dimensional (4-D) light fields (LFs) enable novel imaging technologies, which are traditionally based on two-dimensional images. In most of these applications, denoising of LFs is required as a preprocessing technique before any subsequent proce
Publikováno v:
IEEE Transactions on Circuits and Systems II: Express Briefs. 67:172-176
We propose a novel adaptive denoising algorithm which, in presence of high levels of noise, significantly improves super-resolution and noise robustness of standard frequency estimation algorithms, such as (root-)MUSIC and ESPRIT. During the course o
Autor:
Chamith Wijenayake, Matthew D'Souza, Arash Khatamianfar, Konstanty Bialkowski, Montserrat Ros, Peter Sutton
Publikováno v:
2021 IEEE International Conference on Engineering, Technology & Education (TALE).
Publikováno v:
ISCAS
A method for acquisition of high bandwidth signals is presented as a typical example of a signal processing application of chromatic derivatives and approximations. Chromatic derivatives are numerically robust differential operators based on orthogon
Autor:
Chamira U. S. Edussooriya, Darukeesan Pakiyarajah, Arjuna Madanayake, Sakila S. Jayaweera, Chamith Wijenayake
Publikováno v:
ISCAS
We propose a weighted least-squares (WLS) design method for multi-dimensional (M-D) complex-coefficient finite- extent impulse response (FIR) filters. We consider the general form of M-D FIR filters having arbitrary frequency responses and low group
Autor:
Panajotis Agathoklis, Chamira U. S. Edussooriya, Chamith Wijenayake, Len T. Bruton, Dileepa Marasinghe
Publikováno v:
ISCAS
Three-dimensional space-time velocity filters may be used to enhance dynamic passband objects of interest in videos while attenuating moving interfering objects based on their velocities. In this paper, we show that the attenuation of interfering sto