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All Journal International Journal of Electrical and Computer Engineering TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Bulletin of Electrical Engineering and Informatics Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Computer Science
Zubaida Yusoff
Multimedia University
Computer Science & IT Electrical & Electronics Engineering Engineering

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Journal : International Journal of Electrical and Computer Engineering

 1 
0.5 GHz-1.5 GHz Bandwidth 10W GaN HEMT RF Power Amplifier Design Shiva Ghandi Isma Ilamaran; Zubaida Yusoff; Jahariah Sampe
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 3: June 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (548.669 KB) | DOI: 10.11591/ijece.v8i3.pp1837-1843

Abstract

With the current development in wireless communication technology, the need for a wide bandwith in RF power amplifier (RF PA) is an essential. In this paper, the design and simulation of 10W GaN HEMT wideband RF PA will be presented. The Source-Pull and Load-Pull technique was used to design the input and output matching network of the RF PA. From the simulation, the RF PA achieved a flat gain between 15dB to 17dB from 0.5GHz to 1.5GHz. At 1.5GHz, the drain efficiency is simulated to achieve 36% at the output power of 40 dBm while the power added efficiency (PAE) was found to be 28.2%.
Efficient radio resource allocation scheme for 5G networks with device-to-device communication Fareha Nizam; Mardeni Roslee; Zubaida Yusoff; Prince Ugochukwu Nmenme; Keshvinder Singh; Hafizal Mohamad; Anwar Faizd Bin Osman; Ibraheem Abdullah Mohammed Shayea
International Journal of Electrical and Computer Engineering (IJECE) Vol 11, No 6: December 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v11i6.pp5588-5600

Abstract

A vital technology in the next-generation cellular network is device-to-device (D2D) communication. Cellular user enabled with D2D communication provides high spectral efficiency and further increases the coverage area of the cell, especially for the end-cell users and blind spot areas. However, the implementation of D2D communication increases interference among the cellular and D2D users. In this paper, we proposed a radio resource allocation (RRA) algorithm to manage the interference using fractional frequency reuse (FFR) scheme and Hungarian algorithm. The proposed algorithm is divided into three parts. First, the FFR scheme allocates different frequency bands among the cell (inner and outer region) for both the cellular and the D2D users to reduce the interference. Second, the Hungarian weighted bipartite matching algorithm is used to allocate the resources to D2D users with the minimum total system interference, while maintaining the total system sum rate. The cellular users share the resources with more than one D2D pair. Lastly, the local search technique of swapping is used for further allocation to minimize the interference. We implemented two types of assignments, fair multiple assignment, and restricted multiple assignment. We compared our results with existing algorithms which verified that our proposed algorithm provides outstanding results in aspects like interference reduction and system sum rate. For restricted multiple assignment, 60-70% of the D2D users are allocated in average cases.
Co-Authors Anwar Faizd Bin Osman Azah Syafiah Mohd Marzuki Fareha Nizam Hafizal Mohamad Ibraheem Abdullah Mohammed Shayea Jahariah Sampe Keshvinder Singh Mardeni Roslee Md. Golam Sadeque Mohd Faizal Jamlos Muhammad Akmal Chaudhary Mursyidul Idzam Sabran Nazihah Ahmad Noor Syakirah Ruslan Hadi Noorlindawaty Md. Jizat Nuramirah Mohd Nor Prince Ugochukwu Nmenme Shaiful Jahari Hashim Shaiful Jahari Hashim Shiva Ghandi Isma Ilamaran