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In this paper we present the first on-sky results with the fibered aperture masking instrument FIRST. Its principle relies on the combination of spatial filtering and aperture masking using single-mode fibers, a novel technique that is…

Instrumentation and Methods for Astrophysics · Physics 2015-06-04 E. Huby , G. Perrin , F. Marchis , S. Lacour , T. Kotani , G. Duchêne , E. Choquet , E. L. Gates , J. M. Woillez , O. Lai , P. Fédou , C. Collin , F. Chapron , V. Arslanyan , K. J. Burns

In Photoacoustic imaging (PA), Delay-and-Sum (DAS) beamformer is a common beamforming algorithm having a simple implementation. However, it results in a poor resolution and high sidelobes. To address these challenges, a new algorithm namely…

Signal Processing · Electrical Eng. & Systems 2018-02-13 Moein Mozaffarzadeh , Ali Mahloojifar , Mahdi Orooji , Karl Kratkiewicz , Saba Adabi , Mohammadreza Nasiriavanaki

Millimeter-wave wireless networks offer high throughput and can (ideally) prevent eavesdropping attacks using narrow, directional beams. Unfortunately, imperfections in physical hardware mean today's antenna arrays all exhibit side lobes,…

Cryptography and Security · Computer Science 2018-10-25 Yanzi Zhu , Ying Ju , Bolun Wang , Jenna Cryan , Ben Y. Zhao , Haitao Zheng

Side-pumping fibre combiners offer several advantages in fibre laser design, including distributed pump absorption, reduced heat load, and improved flexibility and reliability. These benefits are particularly important for all-fibre lasers…

Optics · Physics 2024-09-02 Boris Perminov , Kirill Grebnev , Uwe Huebner , Maria Chernysheva

Smart glasses are increasingly positioned as the next-generation interface for ubiquitous access to large language models (LLMs). Nevertheless, achieving reliable interaction in real-world noisy environments remains a major challenge,…

Audio and Speech Processing · Electrical Eng. & Systems 2025-07-09 Yang Liu , Li Wan , Yiteng Huang , Yong Xu , yangyang shi , Saurabh Adya , ming sun , Florian Metze

We show how to utilize machine learning approaches to improve sliding window algorithms for approximate frequency estimation problems, under the ``algorithms with predictions'' framework. In this dynamic environment, previous…

Data Structures and Algorithms · Computer Science 2024-09-19 Rana Shahout , Ibrahim Sabek , Michael Mitzenmacher

Whispering gallery mode (WGM) microdisk resonators are promising optical devices that confine light efficiently and enable enhanced nonlinear optical effects. This work presents a novel approach to reduce sidewall roughness in…

There is already a method known from the literature with which it is possible to measure both the transfer function and the noise power spectral density of the superimposed noise at the output of a disturbed, time-invariant, real system…

Signal Processing · Electrical Eng. & Systems 2025-11-20 Helmut Repp

The ability to cancel an OFDM signal is important to many wireless communication systems including Power-Domain Non-orthogonal Multiple Access (PD-NOMA), Rate-Splitting Multiple Access (RSMA), and spectrum underlay for dynamic spectrum…

Signal Processing · Electrical Eng. & Systems 2023-03-23 Daniel Chew , Samuel Berhanu , Chris Baumgart , A. Brinton Cooper

We report the results of a recent search for the lowest value of thermal noise that can be achieved in LIGO by changing the shape of mirrors, while fixing the mirror radius and maintaining a low diffractional loss. The result of this…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Mihai Bondarescu , Oleg Kogan , Yanbei Chen

WFIRST will be capable of providing Hubble-quality imaging performance over several thousand square degrees of the sky. The wide-area, high spatial resolution survey data from WFIRST will be unsurpassed for many decades into the future.…

The TMS optical system is based on a decentered dual-reflector system in a Gregorian configuration to observe with an angular resolution of less than $2^\circ$. The primary goal of the present study is to evaluate the final design and…

Instrumentation and Methods for Astrophysics · Physics 2023-09-15 P. Alonso-Arias , P. A. Fuerte-Rodriguez , R. J. Hoyland , J. A. Rubino-Martin

In a cognitive radio system the failure of secondary user (SU) transceivers to promptly vacate the channel can introduce significant access-latency for primary or high-priority users (PU). In conventional cognitive radio systems, the…

Information Theory · Computer Science 2016-09-06 Orion Afisiadis , Andrew C. M. Austin , Alexios Balatsoukas-Stimming , Andreas Burg

Shear-horizontal surface acoustic wave (SH-SAW) filters have shown strong potential for low-loss, compact, GHz-frequency RF front ends. In this work, we demonstrate a high-performance SH-SAW filter design at 4.35 GHz utilizing 42{\deg}Y-cut…

Signal Processing · Electrical Eng. & Systems 2026-05-20 Taran Anusorn , Tzu-Hsuan Hsu , Yuchen Ma , Ruochen Lu

The role of the ILC final focus system (FFS) is to demagnify the beam to the sizes at the IP required to meet the ILC luminosity goals. The current design of final focus performs perfect chromaticity correction in both horizontal and…

Accelerator Physics · Physics 2015-12-09 Dou Wang , Yiwei Wang , Philip Bambade , Jie Gao

Integrated sensing and communication (ISAC) is a key enabling technique for future wireless networks owing to its efficient hardware and spectrum utilization. In this paper, we focus on dual-functional waveform design for a multi-input…

Signal Processing · Electrical Eng. & Systems 2024-06-26 Peishi Li , Ming Li , Rang Liu , Qian Liu , A. Lee Swindlehurst

One of the widely used denoising methods in different domains is the Savitzky-Golay (SG) filter. The SG filter has two design parameters: window length and the filter order. As the length of the window increases, the estimation variance…

Signal Processing · Electrical Eng. & Systems 2018-09-03 Mohammad Sadeghi , Fereidoon Behnia

The Square Kilometre Array's Low Frequency instrument (SKA-LOW) will be the most sensitive aperture array ever used for radio astronomy, and will operate in the under-sampled regime for most of the frequency band where grating-lobes pose…

Instrumentation and Methods for Astrophysics · Physics 2016-12-28 Benjamin Mort , Fred Dulwich , Nima Razavi-Ghods , Eloy de Lera Acedo , Keith Grainge

This paper compares the sensing performance of a narrowband near-field system across several practical antenna array geometries and SIMO/MISO and MIMO configurations. For identical transmit and receive apertures, MIMO processing is…

Signal Processing · Electrical Eng. & Systems 2026-02-11 Marcin Wachowiak , André Bourdoux , Sofie Pollin

Integrated sensing and communication (ISAC) represents a pivotal advancement for future wireless networks. This paper introduces a novel ISAC beamforming method for enhancing sensing performance while preserving communication quality by…

Information Theory · Computer Science 2025-03-07 Meihui Liu , Shu Sun , Ruifeng Gao , Meixia Tao