Irfan AzamKumoh National Institute of Technology · Department of IT Convergence Engineering
Irfan Azam
Ph.D. (Sept. 2018 - Aug. 2022)
Looking for a Postdoctoral Fellowship
About
20
Publications
7,865
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220
Citations
Introduction
My research interests include Non-orthogonal multiple access (NOMA), Massive MIMO (massive MIMO), Index Modulation (IM), mobility management in wireless networks, and investigating new Random Access Technologies (RAT) for 5G and beyond systems. Currently, I am working on UAV communications and non-terrestrial networks (NTN) for 6G.
Additional affiliations
September 2018 - August 2021
February 2017 - August 2018
November 2014 - November 2016
Education
September 2008 - March 2013
Publications
Publications (20)
Due to the increasing number of unmanned aerial vehicles (UAVs) with generally limited battery power, energy-efficient data transmission schemes with massive connectivity capabilities are required for future wireless networks. Non-orthogonal multiple access (NOMA) is a promising technique that provides such massive connectivity by allowing superpos...
This paper presents a joint power and number of intelligent reflecting surfaces (IRS) elements optimization in an IRS-assisted non-orthogonal multiple access (NOMA) network. The proposed optimized IRS NOMA (OIRS-NOMA) solution finds the optimal number of IRS elements and the power allocation factors with log-time complexity. Furthermore, the pair s...
In this article, a spatial media-based modulation-aided uplink multiple-input–multiple-output (MIMO) nonorthogonal multiple access (SMBM-NOMA) system operating under imperfect channel state information (CSI) is proposed. In addition, two different detection techniques, with successive interference cancellation (SIC) and without SIC are used to dete...
In this paper, a spatial modulation aided uplink non-orthogonal multiple access (SM-NOMA) without successive interference cancellation (SIC) is proposed. The SIC-free SM-NOMA system is investigated under both perfect and imperfect channel state information (CSI). Moreover, on the receiver side, both SIC-based and SIC-free detection techniques are u...
Due to an increasing number of unmanned aerial vehicles (UAVs) with generally limited battery power, energy efficient data transmission schemes with massive connectivity capabilities are required for future wireless networks. Non-orthogonal multiple access (NOMA) is one of the promising techniques that provide such massive connectivity by allowing...
In this paper, role switching and power allocation schemes are proposed to tackle user mobility in non-orthogonal multiple access (NOMA) systems. A downlink transmission scenario is considered, where two highly mobile users, a cell center user and a cell edge user, are paired/served over the same channel resource using NOMA. In such high mobility s...
In this letter, role switching and power allocation schemes are proposed to tackle user mobility in non-orthogonal multiple access (NOMA) systems. When cell center user (CCU) and cell edge user (CEU) come very close or even cross each other in NOMA pairing, channel gains of paired users violate the basic NOMA conditions. This article refers to such...
This paper focuses on user pairing (UP) and power
allocation (PA) by considering an uplink Non-orthogonal multiple
access (NOMA) system. In NOMA, UP and PA serve as critical
factors to achieve high performance gains. In this context,
channel gains of paired users and their PA factors are varied
to comprehensively analyze the dynamics of UP and PA i...
Human facial expression is important means of non-verbal communication and conveys a lot more information visually than vocally. In human-machine interaction facial expression recognition plays a vital role. Still facial expression recognition through machines like computer is a difficult task. Face detection, feature extraction and expression clas...
In this paper, to monitor the fields with square and circular geometries, three energy-efficient routing protocols are proposed for underwater wireless sensor networks (UWSNs). First one is, sparsity-aware energy efficient clustering (SEEC), second one is, circular SEEC (CSEEC), and the third one is, circular depth based SEEC (CDSEEC) routing proto...
Due to limited energy resources, energy balancing becomes an appealing requirement/ challenge in Underwater Wireless Sensor Networks (UWSNs). In this paper, we present a Balanced Load Distribution (BLOAD) scheme to avoid energy holes created due to unbalanced energy consumption in UWSNs. Our proposed scheme prolongs the stability period and lifetim...
Underwater Wireless Sensor Networks (UWSNs) consist of sensor nodes deployed to sense underwater environment. Sensor nodes gather the required information and report it to sink through a predefined routing path. Research community is getting interest in UWSNs due to its emerging applications such as costal surveillance for defense strategies, disas...
In this paper, we overcome the problem of energy holes in UWSNs while considering the unique characteristics of underwater communication. In proposed scheme we consider UWSNs where nodes are manually deployed according to the defined deployment pattern to satisfy our application requirements in terms of energy saving. We used mixed routing techniqu...
In this paper, we propose a reliable and interference-aware routing protocol for underwater wireless sensor networks (UWSNs). Proposed protocol follows end-to-end path from source node to sink and selects next forwarder node of a data packet on the basis, having already established a path to sink. In this way, the problem of encounters void hole in...
Large propagation delay, high error rate, low bandwidth and limited energy in Underwater Sensor Networks (UWSNs) attract the attention of most researchers. In UWSNs, efficient utilization of energy is one of the major issue, as the replacement of energy sources in such environment is very expensive. In this paper, we have proposed a Cluster Depth B...
Many routing protocols are proposed regarding energy efficiency in underwater wireless sensor networks (UWSNs). We propose sparsity-aware energy efficient clustering (SEEC) protocol for UWSNs. SEEC specially search sparse regions of the network. We divide the network region into subregions of equal size and search sparse and dense regions of the ne...
The smart phones are most commonly used by everyone nowadays. People store their personal information like pictures, videos, contacts, passwords and user accounts. To manage this type of sensitive data and to secure the data, a micro trusted computing base (TCB) approach was introduced. It provides core services to applications to secure the privat...
Questions
Questions (2)
Currently, most of the reports show that the no. of Tx/Rx antennas for mMIMO (commercially deployed and tested) are upto128 (64T64R-TDD etc). Does anyone knows:
1. What is the number of Tx/Rx antennas in 3GPP Release-16?
2. What is the number of antennas in commercial 5G(5G+) BS in 3.5GHz?
In Massive MIMO, multiple antennas can transmit simultaneously. But, is it practical, that a BS in mMIMO serves two different user groups within a cell simultaneously using two different transmission techniques?
Lets say, if we have K user groups and 1...K/2 are served using Scheme-A and the other K/2+1...K user groups are served simultaneously using Scheme-B.
I want to know the practicability as well as theoretical possibilities.
Projects
Projects (2)
The goal of this project is to provide solutions for the autonomous movement of Unmanned Ariel Vehicles (UAVs) to search for targets.
This project deals with the design and performance evaluation of Radio Access Technologies (RATs) that are possible candidates for beyond 5G/6G and Future Radio Access (FRA)
The key technologies under our focus (but not limited to) are outlined below:
1. Non-orthogonal Multiple Access (NOMA)
2. Massive MIMO
3. Orbital Angular Momentum (OAM)
4. Reconfigurable Intelligent Surface (RIS)
5. Index Modulation (IM)
6. Full Duplex
