Adnan Zafar

ORCID: 0000-0002-5934-5236
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About
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Research Areas
  • PAPR reduction in OFDM
  • Advanced Wireless Communication Technologies
  • Radar Systems and Signal Processing
  • Wireless Communication Networks Research
  • Advanced Wireless Communication Techniques
  • Guidance and Control Systems
  • Advanced Power Amplifier Design
  • Cooperative Communication and Network Coding
  • Advanced MIMO Systems Optimization
  • Vehicular Ad Hoc Networks (VANETs)
  • Radio Frequency Integrated Circuit Design
  • Privacy-Preserving Technologies in Data
  • Optical Wireless Communication Technologies
  • Wireless Networks and Protocols
  • Wireless Signal Modulation Classification
  • Underwater Vehicles and Communication Systems
  • Radiation Effects in Electronics
  • Parallel Computing and Optimization Techniques
  • Military Defense Systems Analysis
  • Millimeter-Wave Propagation and Modeling
  • Distributed systems and fault tolerance
  • Analog and Mixed-Signal Circuit Design
  • Full-Duplex Wireless Communications
  • IoT and GPS-based Vehicle Safety Systems
  • Bioactive Compounds in Plants

Institute of Space Technology
2008-2024

University of Surrey
2015-2020

It has been claimed that filter bank multicarrier (FBMC) systems suffer from negligible performance loss caused by moderate dispersive channels in the absence of guard time protection between symbols. However, a theoretical and systematic explanation/analysis for statement is missing literature to date. In this paper, based on one-tap minimum mean square error (MMSE) zero-forcing (ZF) channel equalizations, impact doubly FBMC analyzed terms received Based analytical framework, we prove...

10.1109/tvt.2016.2602096 article EN IEEE Transactions on Vehicular Technology 2016-01-01

Due to the use of an appropriately designed pulse shaping prototype filter, filter bank multicarrier (FBMC) system can achieve low out band (OoB) emissions and is also robust channel synchronization errors. However, it comes at a cost long tails which may reduce spectral efficiency significantly when block size small. Filter output truncation (FOT) overhead by discarding but destroy orthogonality FBMC system, introducing inter carrier interference (ICI) symbol (ISI) terms in received signal....

10.1109/tvt.2017.2771531 article EN IEEE Transactions on Vehicular Technology 2017-11-08

Orthogonal frequency division multiplexing (OFDM-IM) is a multicarrier transmission technology that modulates information bits not just onto subcarriers by means of M-ary constellation mapping but also selected (active) subcarrier indices. Consequently, errors can occur in OFDM-IM systems indices addition to the symbols. This paper analyzes error scenarios and derives mathematical expressions for performance based on maximum likelihood (ML) detection. In evaluating bit rate (BER) additive...

10.1109/access.2020.2972113 article EN cc-by IEEE Access 2020-01-01

The increasing demand for higher data rates and improved energy efficiency (EE) in next-generation wireless networks necessitates the optimized selection of multiple-access coordination techniques. A hybrid joint transmission (JT)-coordinated multi-point (CoMP) enabled orthogonal multiple access (OMA)/non-orthogonal (NOMA) technique, combining spectral (SE) capacity benefits CoMP NOMA with interference mitigation OMA, offers a highly adaptable solution future networks. This paper studies...

10.1016/j.comnet.2024.110733 article EN cc-by Computer Networks 2024-08-23

Several techniques such as carrier aggregation (CA) and cognitive radio (CR) have been proposed to achieve high data rates meet the demand of future wireless communication systems. Those pose a strict adjacent channel interference (ACI) requirement. However, currently employed orthogonal frequency division multiplexing (OFDM) systems suffer from significant spectrum leakage require large guard bands avoid ACI. To tackle this problem, there is need explore new suitable multicarrier modulation...

10.1109/camad.2015.7390479 article EN 2015-09-01

DDR memory used for data storage in space applications is subjected to different errors. These errors are caused by various perturbations such as cosmic radiations, solar galactic noise, electromagnetic radiations and extreme temperature space, which can corrupt the stored memory. Error detection techniques allow detecting errors, while error correction enables reconstruction of original data. enable reliable delivery digital over an unreliable communication channel. This paper focuses on...

10.1109/icase.2013.6785556 article EN 2013-08-01

The ever-evolving technology has given rise to a dynamic and intricate Radar environment, profoundly impacting warfare. Repeater Jammers pose significant threat systems by re-transmitting intercepted signals with added noise or false information, thereby disrupting the target detection process. Traditional waveform designs often struggle counter such jammers due their adaptive sophisticated nature. To address this challenge, proposed approach leverages reinforcement learning (RL) algorithms...

10.2139/ssrn.4581215 preprint EN 2023-01-01

In this paper we present a system design that incorporates the functionalities of digital modulator/demodulator along with controlling features such as symbol generation, filtering, modulation, demodulation, phase and timing recovery for QPSK 16 QAM modulation schemes. It is concluded BER 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-5</sup> an E <sub xmlns:xlink="http://www.w3.org/1999/xlink">b</sub> /N...

10.1109/icast.2008.4747688 article EN 2008-11-01

Abstract Mobile networks have to cater for diverse services that distinct requirements in terms of bandwidth, latency, and so on. Network virtualization is a key technology efficiently utilizes the network resources meet these service requirements. In this work, we investigate radio creating fine‐grained slices using orthogonal frequency division multiplexing (OFDM) filter bank multicarrier (FBMC) combinations; two are individually referred as virtual radios (VRs). Using universal software...

10.1002/ett.4154 article EN Transactions on Emerging Telecommunications Technologies 2020-10-23

Driven by massive Internet of Things (IoT) adoption, heterogeneity and diverse network requirements in 5G beyond (B5G), energy efficiency (EE) has also emerged as a crucial design objective. Having single multipleaccess scheme that works for all users with constraints is not resource efficient solution. While coordinated multi-point (CoMP) non-orthogonal multiple access (NOMA) addresses the users, particularly at cell edges, terms spectral (SE), connectivity, capacity. CoMP orthogonal (OMA)...

10.2139/ssrn.4820783 preprint EN 2024-01-01

10.1109/wcnc57260.2024.10570762 article EN 2022 IEEE Wireless Communications and Networking Conference (WCNC) 2024-04-21
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