A5100329747- Advanced Wireless Communication Techniques
- Wireless Communication Networks Research
- Cooperative Communication and Network Coding
- Advanced MIMO Systems Optimization
- Advanced Wireless Communication Technologies
- Advanced Wireless Network Optimization
- PAPR reduction in OFDM
- Error Correcting Code Techniques
- Full-Duplex Wireless Communications
- Coding theory and cryptography
- Satellite Communication Systems
- Optical Wireless Communication Technologies
- Wireless Communication Security Techniques
- Molecular Communication and Nanonetworks
- Advanced biosensing and bioanalysis techniques
- Power Line Communications and Noise
- Mobile Ad Hoc Networks
- Energy Harvesting in Wireless Networks
- Millimeter-Wave Propagation and Modeling
- Wireless Body Area Networks
- ZnO doping and properties
- Cognitive Radio Networks and Spectrum Sensing
- Opportunistic and Delay-Tolerant Networks
- Ga2O3 and related materials
- Indoor and Outdoor Localization Technologies
University of Southampton
2016-2025
Shanghai Electric (China)
2024
National Kaohsiung University of Science and Technology
2020-2023
National Yang Ming Chiao Tung University
2023
Beijing University of Posts and Telecommunications
2022
University of Surrey
2015-2022
ORCID
2020
Nankai University
2020
Nanjing University of Posts and Telecommunications
2018
Jilin Medical University
2015
Zinc oxide (ZnO), with its excellent luminescent properties and the ease of growth nanostructures, holds promise for development photonic devices. The recent advances in ZnO nanorods are discussed. Results from both low temperature high approaches presented. techniques which presented include metal–organic chemical vapour deposition (MOCVD), phase epitaxy (VPE), pulse laser (PLD), vapour–liquid–solid (VLS), aqueous (ACG) finally electrodeposition technique as an example a selective approach....
A class of generalized multicarrier direct sequence code-division multiple-access (MC DS-CDMA) schemes is defined and its performance considered over multipath Nakagami-m fading channels. The spacing between two adjacent subcarriers the MC DS-CDMA a variable, allowing us to gain insight into effects on bit error rate (BER) systems. This scheme includes subclasses multitone orthogonal as special cases. We present unified analytical framework for determining exact average BER system (1960)...
A new Multiple Input Output (MIMO) transmission scheme termed as Generalised Pre-coding aided Spatial Modulation (GPSM) is proposed, where the key idea that a particular subset of receive antennas activated and activation pattern itself conveys useful information. This in contrast to previously proposed (SM) schemes, which operated by activating specific transmit antennas. We provide both analytical numerical results characterizing GPSM for conventional well large-dimensional MIMO...
This paper proposes and studies a transmitter preprocessing aided spatial modulation (PSM) scheme, which conveys information jointly by conventional amplitude-phase (APM) space shift keying (pre-SSK) modulation. In contrast to the existing SSK modulation, carries using indexes of antennas assumes channel state at receiver (CSIR), pre-SSK extracts transmitted receive (CSIT). addresses issues optimization detection PSM signals. Furthermore, bit-error-rate (BER) performance is investigated,...
Vertically well-aligned ZnO nanorods on Si substrates were prepared by a two-step chemical bath deposition method. The structure and optical properties of the grown investigated Raman photoluminescence spectroscopy. results showed that after an annealing treatment at around 500 °C in air atmosphere, crystal became much better due to decrease surface defects. resonant measurements excited 351.1 nm not only revealed defects play significant role as-grown sample, which was supported low...
Non-orthogonal multiple access (NOMA) is a promising technique for future mobile communication systems, which can approach multiuser channel capacity by sharing the same time-frequency resources with users. In this article, we provide unified framework NOMA and review principles of various schemes in different domains objective creating framework. A systematic performance comparison regarding their peak-to-average power ratio, receiver complexity, latency, grant-free access, user load, peak...
The recently proposed multiple input output (MIMO) transmission scheme termed as generalized pre-coding aided spatial modulation (GPSM) is analyzed, where the key idea that a particular subset of receive antennas activated and specific activation pattern itself conveys useful implicit information. We provide upper bound both symbol error ratio (SER) bit (BER) expression GPSM low-complexity decoupled detector. Furthermore, corresponding discrete-input continuous-output memoryless channel...
Indoor positioning is one of the core technologies Internet Things (IoT) and artificial intelligence (AI) expected to play a significant role in upcoming era AI. However, affected by complexity indoor environments, it still highly challenging achieve continuous reliable positioning. Currently, 5G cellular networks are being deployed worldwide, new which have brought approaches for improving performance wireless In this article, we investigate under radio (NR), has been standardized...
Precoding-aided spatial modulation (PSM), which conveys information partially by the indices of receive antennas, has some advantages over conventional (SM) using transmit antennas. In PSM, precoder may be optimized for different purposes. this paper, we study transmitter design in PSM systems, motivates to provide secrecy communications. Specifically, consider a pair communication terminals overheard an eavesdropper. The is jointly minimizing power received eavesdropper and maximizing...
This paper is focused on code-domain non-orthogonal multiple access (CD-NOMA), which an emerging paradigm to support massive connectivity for future machine-type wireless networks. We take a comparative approach study two types of overloaded CD-NOMA, i.e., sparse code (SCMA) and dense (DCMA), are distinctive from each other in terms their codebooks having sparsity or not. By analysing individual diversity orders (DO) Rayleigh fading channels, it found that DCMA can be designed with the aid...
Next-generation communication systems aim for providing pervasive services, including the high-mobility scenarios routinely encountered in mission-critical applications. Hence we harness recently-developed reconfigurable intelligent surfaces (RIS) to assist cell-edge users. However, face of high Doppler frequencies, existing RIS channel estimation techniques that assume block fading generally result irreducible error floors. In order mitigate this problem, propose a new technique, which is...
We identify some of the key problems that may be encountered when designing a broadband multiple access system with bandwidth on order tens or even hundreds megahertz. commence comparative discussion in terms characteristics three typical code-division schemes: single-carrier direct-sequence CDMA (SC DS-CDMA), multicarrier (MC-CDMA), and DS-CDMA (MC DS-CDMA). Specifically, their benefits deficiencies are analyzed aiming to support ubiquitous communications over variety channels indoor, open...
Spatial reuse in a wireless network can allow multiple communications to proceed simultaneously, hence proportionally improve the overall throughput. To maximize spatial reuse, MAC protocol must enable simultaneous transmitters maintain minimal separation distance avoid interference. This paper demonstrates that physical carrier sensing enhanced with tunable threshold is effective at avoiding interference 802.11 mesh networks without requiring use of virtual through RTS/CTS. We present...
In this paper we present our new findings on the growth, characterization and nano-devices based ZnO nanowires. We will limit scope of article to low temperature grown nanowires, due fact that growth is suitable for many applications. On size control methodology nanowires Si substrates using techniques. The effect annealing these investigated discussed. then results surface recombination velocity This be followed by demonstration prototype nano-devices. These include two electrochemical...
The (lower-bound) symbol error rate (SER) performance of cooperative digital communication schemes is investigated, where multiple dual-hop relays are invoked for achieving the diversity with aid maximal ratio combining (MRC). A range closed-form expressions obtained probability density functions (PDFs) relay-channels' output signal-to-noise (SNR). Accurate and approximated derived computing SER. Our study shows that, in this contribution, SER relay-assisted communications schemes, which may...
The DFT-based beamforming weight-vector codebook is considered as an effective design for spatially correlated channels. In this paper, we demonstrate that when the antenna elements are uniformly spaced well linearly arranged, and channels correlated, codewords in a beaforming approximately match distribution of optimal weight-vectors. As result, indeed effective. Furthermore, also if circulary statistical weight-vectors becomes different. We will scenario no longer outperform Grassmannian...
In this letter, the precoding-aided spatial modulation (PSM) is generalized to a secret PSM (SPSM) scheme, which has capability resist malicious eavesdropping from an eavesdropper that unknown transmitter. We design time-varying precoder for SPSM so it can retain all PSM's advantages at desired receiver while producing interference eavesdropper. The secrecy capacity of our proposed studied, and optimal power allocation between signal transmission investigated. Our studies performance results...
In orthogonal frequency division multiplexing relying on subcarrier index modulation (OFDM-SIM), the information is conveyed by both indices of activated subcarriers and conventional amplitude-phase modulated (APM) symbols. It has been shown that OFDM-SIM capable striking a tradeoff between attainable spectral efficiency (SE) energy (EE). order to further increase EE system, while potentially increasing its SE, we propose compressed sensing (CS)-assisted signaling strategy for family...
Sixty years of coherent versus non-coherent tradeoff as well the twenty in Multiple-Input Multiple-Output (MIMO) systems are surveyed. Furthermore, advantages adaptivity discussed. More explicitly, order to support diverse communication requirements different applications a unified platform, 5G New Radio (NR) offers unprecendented adaptivity, abeit at cost substantial amount signalling overhead that consumes both power and valuable spectral resources. Striking beneficial is capable reducing...
In this paper, we propose an energy-efficient spatial modulation-based molecular communication (SM-MC) scheme, in which a transmitted symbol is composed of two parts, i.e., space derived and concentration symbol. The by embedding the information into index single activated transmitter nanomachine. drawn according to conventional shift keying (CSK) constellation. Benefiting from active during each period, SM-MC can avoid inter-link interference problem existing current multiple-input...