A5048977108- Energy Efficient Wireless Sensor Networks
- Underwater Vehicles and Communication Systems
- Energy Harvesting in Wireless Networks
- Advanced MIMO Systems Optimization
- Wireless Communication Networks Research
- Wireless Networks and Protocols
- Indoor and Outdoor Localization Technologies
- Mobile Ad Hoc Networks
- Satellite Communication Systems
- Advanced Wireless Network Optimization
- Cognitive Radio Networks and Spectrum Sensing
- Cooperative Communication and Network Coding
- IoT Networks and Protocols
- Full-Duplex Wireless Communications
- Underwater Acoustics Research
- Wireless Body Area Networks
- Optical Network Technologies
- Photonic and Optical Devices
- Power Line Communications and Noise
- Network Traffic and Congestion Control
- Advanced Photonic Communication Systems
- Security in Wireless Sensor Networks
- Millimeter-Wave Propagation and Modeling
- Advanced Wireless Communication Techniques
- Modular Robots and Swarm Intelligence
University of York
2016-2025
Optoscribe (United Kingdom)
2014-2021
Acoustic Institute named after NN Andreev
2020
ORCID
2020
Heriot-Watt University
2014-2017
Institute of Physics
2014-2017
Universities UK
2001-2015
Microsoft (United States)
1999-2012
York University
2006
Danaher (United Kingdom)
1995-1997
The introduction of millimeter wave (mm-wave) frequency bands for cellular communications with significantly larger bandwidths compared to their sub-6 GHz counterparts, the resulting densification network deployments and antenna arrays beamforming result in major increases fronthaul capacity required 5G networks. As a result, radical re-design radio access is since traditional technologies are not scaleable. In this article use analog radio-over-fiber (ARoF) proposed demonstrated as viable...
Simulation forms an important part of the development and empirical evaluation underwater acoustic network (UAN) protocols. The key feature a credible simulation model is realistic channel model. A common approach to simulating (UWA) channels by using specialised beam tracing software such as BELLHOP. However, BELLHOP similar modeling typically require knowledge ocean acoustics substantial programming effort from UAN protocol designers integrate it into their research. This paper distilled...
This paper investigates the application of underwater acoustic sensor networks for large scale monitoring ocean environment. The low propagation speed signals presents a fundamental challenge in coordinating access to shared communication medium such networks. In this paper, we propose two control (MAC) protocols, namely, Transmit Delay Allocation MAC (TDA-MAC) and Accelerated TDA-MAC, that are capable providing time division multiple (TDMA) nodes without need centralized clock...
In this paper, we consider a general cooperative wireless sensor network (WSN) with multiple hops and the problem of channel estimation. Two matrix-based set-membership (SM) algorithms are developed for estimation complex matrix parameters. The main goal is to significantly reduce computational complexity, compared existing estimators, extend lifetime WSN by reducing its power consumption. first proposed algorithm SM normalized least mean squares (SM-NLMS) algorithm. second recursive (RLS)...
This paper presents a novel Medium Access Control (MAC) protocol named ALOHA and Q-Learning based MAC with Informed Receiving (ALOHA-QIR) for Wireless Sensor Networks (WSNs). scheme is implemented by combining frame Slotted Q-Learning. schemes have the benefits of simplicity, low computation overheads, but suffer collisions from blind transmission strategy. By considering previous experience, offers nodes certain intelligence to access slots lower probability collision. During data...
Underwater acoustic (UWA) communication suffers from the limited available bandwidth for data transmission. Full-duplex (FD) has demonstrated ability of achieving high spectral efficiency in terrestrial radio communications. There is a significant potential adopting benefits FD UWA systems. The major obstacle communications severe self-interference (SI) introduced by near-end transmitted signal. For communications, low signal frequency allows high-resolution analogue-to-digital converter...
The demand for regular monitoring of the marine environment and ocean exploration is rapidly increasing, yet limited bandwidth slow propagation speed acoustic signals leads to low data throughput underwater networks used such purposes. This study describes a novel approach medium access control that engenders efficient use an channel. ALOHA-Q protocol designed terrestrial radio sensor reinforcement learning incorporated into provide channel access. In principle, it potentially offers...
This paper discusses different ways of delivering dasiagreenpsila cognitive radio based systems. Fundamental is the need to exploit free spectrum available and power efficient modulation where possible. The describes a variable power/bandwidth strategy level adjusted by cognitively determining assignment use spectrum, taking into account channel occupancy probability. Battery life for techniques also considered. Secondly, reduce complexity overall systems, particularly in sensing exploiting...
With the increasing interest in wireless communications from solar-powered aircraft-based high altitude platforms (HAPs), it is imperative to assess feasibility of their deployment different locations with constraints on energy consumption and payload weight under consideration. This paper considers management HAPs for service provisioning equatorial regions further up northern hemisphere. The total solar harvested consumed shortest day year analyzed, explained how this determines long...
This study introduces two novel approaches, pre-partitioning and weight-driven exploration, to enable an efficient learning process in the context of cognitive radio. Learning efficiency is crucial when applying reinforcement radio since users will cause a higher level disturbance exploration phase. Careful control tradeoff between exploitation for learning-enabled order efficiently learn from interactions with dynamic environment investigated. In scheme, potential action space radios...
Internet-of-Underwater-Things (IoUT) systems comprising tens or hundreds of underwater acoustic communication nodes will become feasible in the near future. The development scalable networking protocols is a key enabling technology for such IoUT systems, but this task challenging due to fundamental limitations channel: extremely slow propagation and limited bandwidth. aim article propose JOIN protocol enable integration new into an existing network without control overhead typical...
To enable long-term, large-scale, dense underwater sensor networks or Internet of Underwater Things (IoUT) this research investigates new novel waveforms and experimental prototypes for robust communications on ultra-low-cost ultra-low-power, miniature acoustic modems. Spread-spectrum M-ary orthogonal signalling (MOS) is used with symbols constructed from subsequences long pseudorandom codes. This decorrelates multipath signals, even when the time-spread spans many symbols, so they present...
In underwater acoustic (UWA) random access communication networks with multiple users and data packet transmissions, the collisions are main cause of network performance degradation. The aim this article is to investigate interference cancellation (IC) techniques capable resolving such in a low-complexity modem single-carrier modulation single transducer. More specifically, modem, IC used at stages receiver. First, performed for canceling multipath improve equalization comparison linear Rake...
We present a 57 channel spatial multiplexer consisting of 19 separate 3-port photonic lanterns arranged in hexagonal array. An average insertion loss 0.92 dB was measured across all ports with 0.1 uniformity.
To enable full-duplex (FD) in underwater acoustic (UWA) systems, a high level of self-interference cancellation (SIC) is required. This can be achieved by using combination SIC methods, including digital SIC. For SIC, adaptive filters are used. In time-invariant channels, the SI effectively cancelled classical recursive least-square (RLS) filters, such as sliding-window RLS (SRLS) or exponential-window RLS, but their performance degrades time-varying e.g., channels with moving sea surface....
The demand for ocean exploration and exploitation is rapidly increasing this has led to rapid growth in the market of mobile vehicles. Given mobility, key challenge design a highly adaptive solution with minimal signalling (and associated delays) which current techniques have not fully addressed. Therefore, mobility challenges underwater channel necessitates new approach Medium Access Control (MAC) provides capability adapt changing conditions no reliance on causes delays. This paper...
This article investigates the application of underwater acoustic sensor networks (UASNs) for large scale monitoring ocean environment. The low propagation speed waves presents a fundamental challenge medium access control (MAC)-coordinating multiple nodes to shared communication medium. In this article, we propose sequential dual-hop transmit delay allocation MAC (SDH-TDA-MAC)-a centralized and routing protocol that facilitates efficient scheduling in UASNs without need clock synchronization...
This paper investigates the ways of improving Grade-of-Service (GoS) in a coexistence scenario with different user types multiple High Altitude Platforms (HAPs) system shared coverage area and radio spectrum. It is achieved through exploitation HAP diversity. An analytical model based on two-dimensional state-transition-rate diagram developed to describe behaviour containing two groups, which have full limited availability. On basis model, novel restriction mechanism implemented order...
In this paper, we present the results of deploying first test prototype USMART low cost underwater sensor network in sea trials Fort William, United Kingdom, on 29 June 2018 and 3 July 2018. We demonstrate ever hardware implementation Transmit Delay Allocation MAC (TDA-MAC) protocol for data gathering acoustic networks (UASNs). The show a successful application TDA-MAC to remote environmental monitoring, integrating range nodes developed by universities Heriot-Watt, York, Newcastle...