A5071596555- Advanced MIMO Systems Optimization
- Millimeter-Wave Propagation and Modeling
- Antenna Design and Optimization
- Antenna Design and Analysis
- Cooperative Communication and Network Coding
- Advanced Wireless Communication Techniques
- Full-Duplex Wireless Communications
- Advanced Wireless Communication Technologies
- Direction-of-Arrival Estimation Techniques
University of Benghazi
2023-2025
National University of Malaysia
2017-2020
The massive multiple-input-multiple-output (MIMO) technology relies on many antennas at base stations to offer high throughput meet 5G network requirements. However, each station requires accurate channel state information during estimation. Pilot contamination is one of the significant challenges that limit higher order MIMO deployment because it causes estimation error. In this paper, a Wiener predictor (WP) using temporal-based prediction technique was first proposed and then extended as...
This paper proposes a new method based on 2D Angle of Arrival (2D-AOA) estimation that employs 3D beamforming to eliminate the effect interference in Massive MIMO (M-MIMO) system. The interferences are results pilot contamination and spatial overlapping from nearby users. High resolution Azimuth Elevation angles detected signals Uniform Rectangular Array (URA) used separate desired signal interfering ones without causing any change construction training signals. Additionally, tilt angle...
This article presents an efficient downlink zeroforcing (ZF) precoding technique that utilizes the twoDimensional Direction of Arrival (2D-DOA) beam-spaced method to maximize energy efficiency multi-cell massive- MIMO systems. The approach for estimating critical elevation and azimuth angles detected signals from distributed sources in massive-MIMO systems is also detailed. A mathematical model ZF developed using these angles, its performance evaluated compared conventional 2D-DOA methods....
Millimeter Wave Massive MIMO is considered as one of the main features in upcoming fifth generation (5G) systems. Inter-cell interference which represented by pilot contamination less critical at mm wave frequencies due to waves' characteristics, however it still has side effects on such system, cannot be ignored. In this paper, we focus analyzing uplink transmission for system that employing hundreds antenna arrays Base Station (BS) and multiple antennas each Mobile (MS). Through training,...
Massive-MIMO is recognized as a promising technology for the next generation of cellular network (5G). uses very large number antennas fro base station compare to served users. promises higher data throughput and capacity mobile networks. However, each needs accurate channel state information (CSI) during estimation process. Pilot contamination one technical challenges due larger that cause error. This paper proposed Wiener Predictor (WP) Coordinated (CoWP) prediction estimation. The results...