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A novel transmission protocol is conceived for a multi-user, multi-relay, multiple-input--multiple-output orthogonal frequency-division multiple-access (MIMO-OFDMA) cellular network based on joint transmit and receive beamforming. More…

信息论 · 计算机科学 2016-09-20 Kent Tsz Kan Cheung , Shaoshi Yang , Lajos Hanzo

Modern Digital radar systems with multiple digital beamforming capability are built of a large number of receivers and requires high-speed data interface links for transmission of receiver baseband data to processor units. High data…

信号处理 · 电气工程与系统科学 2024-09-05 Vishal Maheshwari , K. Sreenivasulu , Mohit Kumar , Vengada Rajan , Sumant Pal , Mohana Kumari

Free-space optics (FSO) is an attractive technology to meet the ever-growing demand for wireless bandwidth in next generation networks. To increase the spectral efficiency of FSO links, transmission over spatial division multiplexing (SDM)…

Transmitting data using the phases on reconfigurable intelligent surfaces (RIS) is a promising solution for future energy-efficient communication systems. Recent work showed that a virtual phased massive multiuser…

信号处理 · 电气工程与系统科学 2023-10-26 Wai-Yiu Keung , Hei Victor Cheng , Wing-Kin Ma

In this paper, the performance of high speed optical fiber based network is analysed by using dispersion compensating module (DCM). The optimal operating condition of the DCM is obtained by considering dispersion management configurations…

网络与互联网体系结构 · 计算机科学 2015-03-12 Ojuswini Arora , Dr. Amit kumar Garg , Savita Punia

High spatio-angular resolution diffusion MRI (dMRI) has been shown to provide accurate identification of complex neuronal fiber configurations, albeit, at the cost of long acquisition times. We propose a method to recover intra-voxel fiber…

图像与视频处理 · 电气工程与系统科学 2021-12-07 Marica Pesce , Audrey Repetti , Anna Auría , Alessandro Daducci , Jean-Philippe Thiran , Yves Wiaux

Diffusion-weighted magnetic resonance imaging (DW-MRI) is a critical imaging method for capturing and modeling tissue microarchitecture at a millimeter scale. A common practice to model the measured DW-MRI signal is via fiber orientation…

Orthogonal frequency division multiplexing (OFDM) has proven itself as an effective multi-carrier digital communication technique. In recent years the interest in optical OFDM has grown significantly, due to its spectral efficiency and…

信号处理 · 电气工程与系统科学 2020-09-01 Amir Weiss , Arie Yeredor , Mark Shtaif

The Orthogonal Frequency Division Multiplexing based M-ary Frequency Shift Keying (OFDM-MFSK) is a noncoherent modulation scheme which merges MFSK with the OFDM waveform. It is designed to improve the receiver sensitivity in the hard…

信号处理 · 电气工程与系统科学 2017-10-31 Ghaith Al-Juboori , Angela Doufexi , Andrew R. Nix

Fifth-generation (5G) systems utilize orthogonal demodulation reference signals (DMRS) to enable channel estimation at the receiver. These orthogonal DMRS-also referred to as pilots-are effective in avoiding pilot contamination and…

信号处理 · 电气工程与系统科学 2025-06-26 Sajad Rezaie , Mikko Honkala , Dani Korpi , Dick Carrillo Melgarejo , Tomasz Izydorczyk , Dimitri Gold , Oana-Elena Barbu

Spatial modulation (SM) has proven to be a promising multiple-input-multiple-output (MIMO) technique which provides high energy efficiency and reduces system complexity. In SM, only one transmitter is active at any given time while the rest…

信息论 · 计算机科学 2020-01-08 Anil Yesilkaya , Rui Bian , Iman Tavakkolnia , Harald Haas

In the fifth-generation and beyond era, reconfigurable intelligent surface (RIS) and dynamic metasurface antennas (DMAs) are emerging metamaterials keeping up with the demand for high-quality wireless communication services, which promote…

信息论 · 计算机科学 2022-09-07 Hanyu Jiang , Li You , Jue Wang , Wenjin Wang , Xiqi Gao

Effective connectivity analysis in functional magnetic resonance imaging (fMRI) studies directional interactions among brain regions and experimental stimuli. Dynamic causal modeling (DCM) is a widely used method to estimate effective…

统计方法学 · 统计学 2026-05-15 Kaitlyn R. Fales , Hyebin Song , Nicole A. Lazar

The recent surge in deploying extremely large antenna arrays is expected to play a vital role in future sixth generation wireless networks, enabling advanced radar target localization with enhanced angular and range resolution. This paper…

信号处理 · 电气工程与系统科学 2025-04-29 Ioannis Gavras , George C. Alexandropoulos

Optical interconnects are becoming a major bottleneck in scaling up future GPU racks and network switches within data centers. Although 200 Gb/s optical transceivers using PAM-4 modulation have been demonstrated, achieving higher data rates…

信号处理 · 电气工程与系统科学 2025-05-27 Marziyeh Rezaei , Dan Sturm , Pengyu Zeng , Sajjad Moazeni

Optical interconnects are the most promising solution to address the data-movement bottleneck in data centers. Silicon microdisks, benefiting from their compact footprint, low energy consumption, and wavelength division multiplexing (WDM)…

光学 · 物理学 2025-10-28 Chao Luan , Alex Sludds , Chao Li , Ian Christen , Ryan Hamerly , Dirk Englund

It is well known that magnetic resonance imaging (MRI) at 7 Tesla (7T) and higher magnets can provide much better signal sensitivity compared with lower field strengths. However, variety of commercially available ultra-high-field MRI coils…

医学物理 · 物理学 2020-06-05 Akbar Alipour , Alan C Seifert , Bradley Delman , Gregor Adriany , Priti Balchandani

Scanning Probe Microscopy (SPM) is the primary tool for exploring nanoscale functionality, yet standard single-frequency operation is fundamentally limited, because the dynamic tip-sample interaction is mathematically underdetermined. While…

This paper gives an overview of radio interfaces devoted for high data rate Wireless Sensor Networks. Four aerospace applications of WSN are presented to underline the importance of achieving high data rate. Then, two modulation schemes by…

网络与互联网体系结构 · 计算机科学 2010-04-08 Julien Henaut , Aubin Lecointre , Daniela Dragomirescu , Robert Plana

We propose a 4-dimensional 2-ary amplitude ring-switched modulation format with 64 symbols, which is denoted as 4D-2A-RS64 encoded over two polarization tributaries to improve the transmission performance over long-haul optical fibers in…

信号处理 · 电气工程与系统科学 2023-11-30 Jingtian Liu , Élie Awwad , Yves Jaouën