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In fading channels, power allocation over channel state may bring a rate increment compared to the fixed constant power mode. Such a rate increment is referred to power allocation gain. It is expected that the power allocation gain varies…

Information Theory · Computer Science 2014-12-25 Zhengchuan Chen , Pingyi Fan , Dapeng Wu , Liquan Shen

Recently, we proposed a capacity expansion approach for transmission grids that combines the upgrade of transmission capacity with a transition in system structure to improve grid operation. The key to this concept is a particular hybrid…

Optimization and Control · Mathematics 2018-11-27 Matthias Hotz , Wolfgang Utschick

High-voltage direct current (HVDC) is a commonly used technology for long-distance power transmission, due to its low resistive losses and low costs. In this paper, a novel distributed controller for multi-terminal HVDC (MTDC) systems is…

Optimization and Control · Mathematics 2014-10-01 Martin Andreasson , Mohammad Nazari , Dimos V. Dimarogonas , Henrik Sandberg , Karl H. Johansson , Mehrdad Ghandhari

In this work, we consider transmissions over block fading channels and assume that adaptive modulation and coding (AMC) and hybrid automatic repeat request (HARQ) are implemented. Knowing that in high signal-to-noise ratio, the conventional…

Information Theory · Computer Science 2018-02-21 Mohammed Jabi , Leszek Szczecinski , Mustapha Benjillali , Abdellatif Benyouss , Benoit Pelletier

In railway applications, it is common to use an LC filter connected between the catenary and the input port of the main converter of the auxiliary and traction systems. In addition, in the auxiliary systems, there is a converter operating…

Systems and Control · Electrical Eng. & Systems 2024-01-25 Diego Ochoa , Antonio Lazaro , Pablo Zumel , Cristina Fernandez , Marina Sanz , Jorge Rodriguez , Andres Barrado

This paper investigates the implementation and application of the multi-variable grid-forming hybrid angle control (HAC) for high-power converters in transmission grids. We explore the system-level performance and robustness of the HAC…

Optimization and Control · Mathematics 2021-10-13 Ali Tayyebi , Alan Magdaleno , Denis Vettoretti , Meng Chen , Eduardo Prieto-Araujo , Adolfo Anta , Florian Dörfler

To enable innovative applications and services, both industry and academia are exploring new technologies for sixth generation (6G) communications. One of the promising candidates is fluid antenna system (FAS). Unlike existing systems, FAS…

Information Theory · Computer Science 2023-05-12 Wee Kiat New , Kai-Kit Wong , Hao Xu , Kin-Fai Tong , Chan-Byoung Chae

This paper proposes a new method for optimizing frequency-hopping ad hoc networks in the presence of Rayleigh fading. It is assumed that the system uses a capacity-approaching code (e.g., turbo or LDPC) and noncoherent binary…

Information Theory · Computer Science 2012-07-17 Salvatore Talarico , Matthew C. Valenti , Don Torrieri

Waveform optimization has shown its great potential to boost the performance of far-field wireless power transfer (WPT). Current research has optimized transmit waveform, adaptive to channel state information (CSI), to maximize the…

Signal Processing · Electrical Eng. & Systems 2023-05-15 Yumeng Zhang , Bruno Clerckx

The co-deployment of radio frequency (RF) and visible light communications (VLC) technologies has been investigated in indoor environments to enhance network performances and to address specific quality-of-service (QoS) constraints. In this…

Information Theory · Computer Science 2017-11-28 Marwan Hammouda , Sami Akın , Anna Maria Vegni , Harald Haas , Jürgen Peissig

Low Level RF (LLRF) control systems of linear accelerators (LINACs) are typically implemented with heterodyne based architectures, which have complex analog RF mixers for up and down conversion. The Gen 3 Radio Frequency System-on-Chip…

Accelerator Physics · Physics 2024-05-15 C. Liu , R. Herbst , B. Hong , L. Ruckman , E. A. Nanni

The increasing application of voltage source converter (VSC) high voltage direct current (VSC-HVDC) technology in power grids has raised the importance of incorporating DC grids and converters into the existing transmission network. This…

Optimization and Control · Mathematics 2022-03-08 Junyi Zhai , Xinliang Dai , Yuning Jiang , Ying Xue , Veit Hagenmeyer , Colin N. Jones , Xiao-Ping Zhang

The diode rectifier unit-based high voltage direct current (DRU-HVDC) transmission with grid-forming (GFM) wind turbine is becoming a promising scheme for offshore wind farm(OWF) integration due to its high reliability and low cost. In this…

Optimization and Control · Mathematics 2024-03-19 Zhekai Li , Kun Han , Xu Cai , Renxin Yang , Haotian Yu , Kepeng Xia , Lulu Liu

Hybrid AC/DC networks are a key technology for future electrical power systems, due to the increasing number of converter-based loads and distributed energy resources. In this paper, we consider the design of control schemes for hybrid…

Optimization and Control · Mathematics 2018-12-27 Jeremy D. Watson , Ioannis Lestas

The energy transition introduces more volatile energy sources into the power grids. In this context, power transfer between different synchronous areas through High Voltage Direct Current (HVDC) links becomes increasingly important. Such…

Systems and Control · Electrical Eng. & Systems 2023-06-16 Sebastian Pütz , Benjamin Schäfer , Dirk Witthaut , Johannes Kruse

The flexibility of radio frequency (RF) systems and the omnipresence of power cables potentially make the cascaded power line communication (PLC)/RF system an efficient and cost-effective solution in terms of wide coverage and high-speed…

Information Theory · Computer Science 2020-10-09 Yun Ai , Long Kong , Michael Cheffena , Symeon Chatzinotas , Bjorn Ottersten

This paper investigates an indoor hybrid visible light communication (VLC) and radio frequency (RF) scenario with two-hop downlink transmission. A light emitting diode (LED) transmits both data and energy via VLC to an energy-harvesting…

Signal Processing · Electrical Eng. & Systems 2024-10-10 Amir Hossein Fahim Raouf , Chethan Kumar Anjinappa , Ismail Guvenc

The concept of complex frequency has been recently introduced on the IEEE Transactions on Power Systems to study bus voltage variations in magnitude and frequency and their link with complex power injections of a power system. In this…

Systems and Control · Electrical Eng. & Systems 2023-10-31 Ignacio Ponce , Federico Milano

The level crossing analog-to-digital converters are meant for the effective conversion of sparse signals by construction. In these converters, the bandwidth-power trade-off requires a re-design of the comparators which takes a lot of time…

Signal Processing · Electrical Eng. & Systems 2021-08-18 Lucas Moura Santana , Duarte Lopes de Oliveira , Lester de Abreu Faria

Frequency conversion (FC) is an enabling process in many quantum information protocols. Recently, it has been observed that upconversion efficiencies in single-photon, mode-selective FC are limited to around 80%.In this letter we argue that…

Quantum Physics · Physics 2016-01-20 Nicolás Quesada , J. E. Sipe