Muhammad Saadi

Secure indoor traffic modeling in long‐term evolution femtocell networks using efficient Markov decision process

Transactions on Emerging Telecommunications Technologies

A New Simulation-Optimization Approach Using Hybrid Radial Basis Function and Particle Swarm Optimization in Multi-Transmitter Placement Planning

With the every passing day, the demand for data traffic is increasing and this demand forces the ... more With the every passing day, the demand for data traffic is increasing and this demand forces the research community not only to look for alternating spectrum for communication but also urges the radio frequency planners to use the existing spectrum smartly. Cell size is shrinking with the every upcoming communication generation which makes the base station placement planning complex and cumbersome. In order to make the next-generation cost-effective, it is important to design the network in such a way which utilizes minimum number of base stations while ensure coverage and quality of service. This paper aims at develop a new approach using hybrid metaheuristic and metamodel applied in multi-transmitter placement planning (MTPP) problem. We apply radial basis function (RBF) metamodel to assist particle swarm optimizer (PSO) in a constrained simulation-optimization (SO) of MTPP to mitigate the associated computational burden of optimization procedure. We evaluate the effectiveness and...

Performance Analysis of Non-binary Low-density Parity-check Code and Its Future Applications

IEIE Transactions on Smart Processing & Computing

Active research has been carried out in the domain of channel coding in order to achieve the Shan... more Active research has been carried out in the domain of channel coding in order to achieve the Shannon limit. This paper presents the performance analysis of binary and non-binary lowdensity parity-check (LDPC) codes for various Galois Field. Performance comparison has been made for non-binary LDPC and its binary counterpart by applying Progressive Edge Growth (PEG) algorithm. Decoding is based on belief propagation and Fast Fourier Transform (FFT) based belief propagation for binary and non-binary LDPC codes, respectively. Simulation results indicate that the non-binary LDPC code outperforms its binary counterpart significantly.

Download

Hardware Software Co-Design of a Farming Robot

Engineering Journal

Food means life and no one can think about living without food. This is the most fundamental huma... more Food means life and no one can think about living without food. This is the most fundamental human necessity and food security is one of the major global concern of this century. With the revolution and recent advancements in the field of electronics and communication, there has been a paradigm shift from conventional farming ways to the modern one. This paper talks about the development of hardware software co-design of agricultural farming robot. Our developed farming robot has two parts namely hardware part which further consists of mechanical, electrical, control and tools segments and the software part which allows user to interact with the farming robot via cloud service. Our proposed hardware architecture is compatible with commercial Farmbot product and the developed web-based software can be extended for more features and applications. Furthermore, the developed robot has been tested and it works well.

Download

Evolution of random access process: From Legacy networks to 5G and beyond

Transactions on Emerging Telecommunications Technologies

Symmetry

Epilepsy is a central nervous system disorder that results in asymmetries of brain regional activ... more Epilepsy is a central nervous system disorder that results in asymmetries of brain regional activation and connectivity patterns. The detection of these abnormalities is oftentimes challenging and requires identification of robust bio-markers that are representative of disease activity. Functional Magnetic Resonance Imaging (fMRI) is one of the several methods that can be used to detect such bio-markers. fMRI has a high spatial resolution which makes it a suitable candidate for designing computational methods for computer-aided biomarker discovery. In this paper, we present a computational framework for analyzing fMRI data consisting of 100 epileptic and 80 healthy patients, with an overall goal to produce a novel bio-marker that is predictive of epilepsy. The proposed method is primarily based on Dissimilarity of Activity (DoA) analysis. We demonstrate that the bio-marker presented in this study can be used to capture asymmetries in activities by detecting any abnormalities in Bloo...

Download

Visible light-based indoor localization using k-means clustering and linear regression

Transactions on Emerging Telecommunications Technologies

Effect of dielectric materials on integrated lens antenna for millimeter wave applications

Microwave and Optical Technology Letters

Cultural Tourism Behaviors: Enhancing the Influence of Tourists’ Perceptions on Local Thai Food and Culture

The Open Psychology Journal

Background: Tourist behavior plays a principle role in preserving the cultural heritage and suppo... more Background: Tourist behavior plays a principle role in preserving the cultural heritage and supporting the economy of the local community. Local food is a significant factor for tourists and an important cultural aspect distinguishing one country from one another. To understand tourists' food decision making, this study investigates tourists’ perceptions of local food. Methods: A mixed-method methodology used a concurrent transformative strategy. Qualitative research comprised in-depth interviews conducted with 15 local food specialists and 10 tourists; quantitative comprised survey structured questionnaires with a sample of 400 tourists travelling in Chiangmai, Thailand. Findings: The result revealed that tourists’ perceptions comprising attitude, subject norm, perceived value and expectation factors positively affected the perception toward local food information. Regression analysis suggested that the four variables contributed 53.4% to the variation of local food. By employi...

Download

An LED Based Indoor Localization System Using k-Means Clustering

2016 15th IEEE International Conference on Machine Learning and Applications (ICMLA), 2016

—This paper introduces a novel visible light positioning (VLP) system using an un-supervised mach... more —This paper introduces a novel visible light positioning (VLP) system using an un-supervised machine learning approach. Two transmitters consist of light emitting diodes (LEDs) which are modulated with 1 kHz and 2.5 kHz sinusoidal signals respectively. At the receiver end, the received signal strength (RSS) is calculated and a sparse grid/cube is constructed by measuring light intensity at different locations. A bilinear interpolation is then applied to create a dense grid of readings which is used for the training of a hierarchical k-means clustering system. For a given query LEDs reading; the trained clusters are used for position estimation by minimizing the distances between the readings and cluster centroids. Experimental results show that an average accuracy of 0.31m can be achieved for a room with the dimensions of 4.3 × 4 × 4m 3. We further compared the performance of two other clustering methods: k-medoids and fuzzy c-means however no significant improvement over the k-means clustering is found.

Performance Analysis of Optical Wireless Communication System using Pulse Width Modulation

Optical wireless communication has emerged as a promising complementary technology for Radio Freq... more Optical wireless communication has emerged as a promising complementary technology for Radio Frequency technology. Reliability and survivability of solid state lighting devices has attracted researchers and is gaining attention as they provide synergistically illumination and communication. Furthermore optical wireless communication is environmental friendly and also helps in energy conservation. In this paper various parameters for visible light and infrared link such as link accuracy, noise immunity have been studied. A simple algorithm has been described for localization and tracking for a full duplex optical wireless communication system.

Download

Design and implementation of secure and reliable communication using optical wireless communication

Wireless networking intensify the tractability in the home and office environment to connect the ... more Wireless networking intensify the tractability in the home and office environment to connect the internet without wires but at the cost of risks associated with stealing the data or threat of loading malicious code with the intention of harming the network. In this paper, we proposed a novel method of establishing a secure and reliable communication link using optical wireless communication (OWC). For security, spatial diversity based transmission using two optical transmitters is used and the reliability in the link is achieved by a newly proposed method for the construction of structured parity check matrix for binary Low Density Parity Check (LDPC) codes. Experimental results show that a successful secure and reliable link between the transmitter and the receiver can be achieved by using the proposed novel technique.

Download

Efficient Medium Access Control Protocols for Broadband Wireless Communications By Suvit Nakpeerayuth, Lunchakorn Wuttisittikulkij, Pisit Vanichchanunt, Warakorn Srichavengsup, Norrarat Wattanamongkhol, Robithoh Annur, Muhammad Saadi, Kamalas Wannakong and Siwaruk Siwamogsatham DOI: 10.5772/16040

A Novel Two Dimensional Visible Light Positioning System Based on Received Signal Strength and Bi-literation

Design and Implementation of Secure and Reliable Communication using Optical Wireless Communication

Frequenz, 2014

Wireless networking intensify the tractability in the home and office environment to connect the ... more Wireless networking intensify the tractability in the home and office environment to connect the internet without wires but at the cost of risks associated with stealing the data or threat of loading malicious code with the intention of harming the network. In this paper, we proposed a novel method of establishing a secure and reliable communication link using optical wireless communication (OWC). For security, spatial diversity based transmission using two optical transmitters is used and the reliability in the link is achieved by a newly proposed method for the construction of structured parity check matrix for binary Low Density Parity Check (LDPC) codes. Experimental results show that a successful secure and reliable link between the transmitter and the receiver can be achieved by using the proposed novel technique.

Download

Performance analysis of optical wireless communication system using pulse width modulation

2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2013

Optical wireless communication has emerged as a promising complementary technology for Radio Freq... more Optical wireless communication has emerged as a promising complementary technology for Radio Frequency technology. Reliability and survivability of solid state lighting devices has attracted researchers and is gaining attention as they provide synergistically illumination and communication. Furthermore optical wireless communication is environmental friendly and also helps in energy conservation. In this paper various parameters for visible light and infrared link such as link accuracy, noise immunity have been studied. A simple algorithm has been described for localization and tracking for a full duplex optical wireless communication system.

Download

Visible light communication – An architectural perspective on the applications and data rate improvement strategies

Demand for bandwidth hungry applications and mobile services is pushing an unquenchable need for ... more Demand for bandwidth hungry applications and mobile services is pushing an unquenchable need for wireless capacity. Existing radio frequency networks are characterized by shared medium, inadequate spectrum, and restricted user capacity. Solid state lighting is modernizing indoor as well as outdoor illumination. The capability of quick switching of light emitting diode makes them superior to other lighting sources enabling simultaneous use as a communication and illumination device. Visible light communication (VLC) using light emitting diodes is an attractive approach for many networking scenarios and is considered as a complementary technology for future heterogeneous wireless networks. This article presents an architectural perspective on the applications and data rate improvement strategies. A wide range of VLC applications have been investigated, comparison has been drawn with radio frequency, and generalized network architecture is also proposed. Numerous applications of VLC are data rate intensive, so data rate improvement approaches have also been studied. At the end, a lucid conclusion is drawn about the applicability, acceptability, and utilization of VLC and co-VLC–based systems.

Download

VLC-The Journey So Far.pdf

An unprecedented demand for connecting physical objects with the internet expedites the realizati... more An unprecedented demand for connecting physical objects with the internet expedites the realization of internet of things, thus creating new challenges to explore new spectrums which are suitable for communication. Visible light communication (VLC) is one promising candidate not only to remove the spectrum crunch issues but also to offer virtually unlimited, unregulated spectrum. This paper discusses how VLC can help solving spectrum crunch, non-availability issues of radio frequency spectrum and how readily available spectrum of VLC can be utilized to cope up with the bandwidth requirements of next-generation networks. Furthermore, this paper also lists the technological innovations in the area of VLC from early days till present and its possible applications in various domains.

Download

An LED based Indoor Localization System using k-means Clustering

—This paper introduces a novel visible light positioning (VLP) system using an un-supervised mach... more —This paper introduces a novel visible light positioning (VLP) system using an un-supervised machine learning approach. Two transmitters consist of light emitting diodes (LEDs) which are modulated with 1 kHz and 2.5 kHz sinusoidal signals respectively. At the receiver end, the received signal strength (RSS) is calculated and a sparse grid/cube is constructed by measuring light intensity at different locations. A bilinear interpolation is then applied to create a dense grid of readings which is used for the training of a hierarchical k-means clustering system. For a given query LEDs reading; the trained clusters are used for position estimation by minimizing the distances between the readings and cluster centroids. Experimental results show that an average accuracy of 0.31m can be achieved for a room with the dimensions of 4.3 × 4 × 4m 3. We further compared the performance of two other clustering methods: k-medoids and fuzzy c-means however no significant improvement over the k-means clustering is found.

Download

A Beam Scanning-Based Indoor Localization System using Light Emitting Diodes

In this paper, an indoor localization system using light emitting diodes (LEDs) is presented. Loc... more In this paper, an indoor localization system using light emitting diodes (LEDs) is presented. Location of an object is determined by scanning two LEDs at pre-defined angles which are modulated at different frequencies. During scanning process, for each LED, two maximum values of received signal strength (RSS) are logged and this information is used to compute the position of an object. Time division multiplexing (TDM) is used to incorporate angle information at the receiver. A bicubic spline interpolation is applied to estimate the position of an object. Simulations are executed for a typical indoor environment with dimensions of (3 × 3 × 2 m 3) and results are validated using experiments. The experimental results confirm that proposed beam scanning approach can be used to determine the location of an object precisely.

Download

Uploads

Papers by Muhammad Saadi

Log In