A5074081484- Advanced MIMO Systems Optimization
- Cooperative Communication and Network Coding
- Advanced Wireless Communication Techniques
- Wireless Communication Networks Research
- Advanced Wireless Network Optimization
- Power Line Communications and Noise
- Energy Harvesting in Wireless Networks
- Full-Duplex Wireless Communications
- Advanced Wireless Communication Technologies
- Smart Grid Security and Resilience
- Blockchain Technology Applications and Security
- Antenna Design and Optimization
- Radar Systems and Signal Processing
- Cognitive Radio Networks and Spectrum Sensing
- Radio Wave Propagation Studies
Multimedia University
2007-2024
Heriot-Watt University
2011-2013
Recent analysis by manufacturers and network operators has shown that current wireless networks are not very energy efficient, particularly the base stations which terminals access services from network. In response to this observation Mobile Virtual Centre of Excellence (VCE) Green Radio project was established in 2009 establish how significant savings may be obtained future systems. This article discusses technical background models consumption station devices. It also describes some most...
A relay cooperation scheme is proposed for the downlink of multicell multiple-input-multiple-output cellular networks. The stations (RSs) will cooperatively transmit signal replicas all user equipments obtained during broadcast phase. We consider different RS decoding strategies phase and joint transmission with degrees channel state information (CSI) sharing also propose partial semi-orthogonal selection (PSUS) method designed specifically cooperation. spectral energy efficiencies are then...
The authors investigate the relay-aided multicell multiple-input–multiple-output (MIMO) cellular network by comparing both signal forwarding and interference relaying paradigms, each employing adaptive MIMO relay scheme. spectral, energy economic efficiency values are utilised as key performance metrics. Furthermore, radio frequency circuit power consumption considered in calculation. They demonstrate that there is a tradeoff between spectral efficiency. Thus, profitability used to find...
One of the significant benefits smart grid as compared to conventional power is capability collect fine-grained data from each meter remotely, thereby enabling utility provider balance load effectively and offer time-adaptive pricing schemes. Nevertheless, ability read fine-granular measurements constitutes a serious privacy threat consumers. Therefore, it crucial consider issues in order preserve consumers' protect integrity. In this paper, we propose Privacy-Preserving Cheat-Resilient...
Existing cell association do not jointly consider load balancing and throughput maximization for efficient resource allocation in Long Term Evolution-Advanced heterogeneous networks. In this paper, a hybrid range extension-almost blank subframe (CRE-ABS) scheme is proposed, which exploits the information of distance signal-to-interference-plus-noise ratio (SINR) to perform executes partial muting. Results show that proposed achieves better performance compared baseline terms network balancing.
In this paper, we investigate the impact of receiver interference cancellation (IC) techniques on base station (BS) downlink transmission power for a multiple-input multiple-output (MIMO) communication system with inter-cell interference. Besides amplifier module whose consumption is determined by required power, also consider signal processing when characterizing total BS. Rather than specifying absolute values, define as proportion module. We influence both and IC Results show that besides...
In LTE/LTE-A networks, femtocells are used to improve service coverage in indoor environments. Cognitive radio allows femtocell users share the available spectrum with primary macrocell users. However, some issues arise because of coexistence between and macrocells. These include but not limited mitigating interference fair distribution network resources. this paper, we use NSGA II solve a multi-objective optimization problem that maximizes resource utilization while minimizing guaranteeing...
By observing that the relay stations (RSs) will receive a signal replica of users' transmissions during broadcast phase, we propose an adaptive cooperation scheme. The RSs utilize readily available and additional diversity naturally inherent in them to either perform cooperative multipoint (COMP) relaying or remain silent with only direct transmission being considered. We investigate this scheme 7 cell network demonstrate system level capacity energy efficiency improvements. Results show...
We investigate the base station (BS) downlink transmission energy for a multiple-input multiple-output (MIMO) communication system operating under an inter-cell interference environment with receiver equipped cancellation (IC) capability. It is demonstrated that, besides number of antennas, IC techniques can have influence on required BS MIMO system. Specifically, choice technique impacts more when receive antennas small. On other hand, converges to minimum value regardless type used large...
Existing indoor power-line grids are a potential solution to the last mile problem for broadband communication providers. However, (PLC) channels suffer from deep frequency notches and severe impulsive noise making powerful signal processing essential if these be utilized. Broadband communications using Multicarrier Code Division Multiple Access(MC-CDMA) with channel coding is considered. Although resilient frequency-selective fading, gain turbo substantially compromised in presence of...
A channel state information (CSI) feedback algorithm based on scalar quantization is proposed for a multiple-input multiple-output (MIMO) transmission. The performance of the evaluated using effective transmission rate, which incorporates effect CSI overhead time. Besides that, power consumed due to computational complexity taken into account together with transmit when evaluating energy efficiency. We compare our other typical algorithms under correlated conditions. Simulation results show...
Efficient channel state information (CSI) feedback is crucial in practical multiuser multiple-input multiple-output (MU-MIMO) networks for effective interference mitigation. In this study, a CSI scheme using random scalar quantization (RSQ) MU-MIMO proposed. The analytical expression the noise variance of RSQ presented. Next, lower bound relative transmission rate network with derived. Using unified framework, trade-off between and energy efficiency depicted. fully loaded network, it shown...
We propose a robust iterative multiuser receiver for decoding convolutional coded code-division multiple access (CDMA) signals in both Gaussian and non-Gaussian channel noise. The is derived from modified maximum a-posteriori (MAP) algorithm called the maxlog-MAP robustness against erroneous variance estimation. Furthermore, effect of destructive outliers arising impulsive noise mitigated proposed by incorporating Huber penalty function into detector. shown to perform satisfactorily over...
A robust front-end pre-filter incorporating non-quadratic signal processing techniques is proposed. We will demonstrate the effectiveness of this filter in suppressing impulsive noises a coded direct sequence code-division multiple access (DS-CDMA)communication system. Based on M-Estimation approach, works by minimizing an appropriate penalty function iterative fashion with minimal increase computational complexity With use system, performance enhancement excess 6dB non-Gaussian channels...
Multiuser multiple-input multiple-output transmission is identified as one of the promising techniques to vastly increase rate especially in densely deployed networks where inter-user interference a major issue. To achieve this, channel state information (CSI) needed ensure accurate precoder design at transmitter order effectively mitigate interference. However, CSI usually estimated receiver and, after quantization, sent back transmitter. The feedback quantized incurs additional overhead...