Performance Analysis of 180° HRR Coupler Used for Direction Finding with an Antenna Array

Int. J. Interact. Mob. Technol.

2022

This paper presents a simple approach to providing location-based services (LBSs) for the remotely located educational and health institutes on demand, particularly in emergency situations i.e., COVID-19, using an antenna array. The proposed approach consists of the sum and difference patterns of the signal obtained from the antenna array at the base station of a wireless network. It provides the location of the targeting institute i.e., education and health, in terms of the angle-of-arrival (AoA) which can be used to steer the radiation beam in the targeted direction in order to provide the desired services i.e., emergency wireless communication link. In this way, fast and high bandwidth-based communication and networking can be possible for the mentioned organizations. We show antenna array design and location finding results in this paper. The obtained results in terms of antenna parameters and AoA show that the proposed approach is efficient, less complicated, and can be implemented in the next-generation wireless networks i.e., AI-enabled IoT and 5G systems, particularly for the educational and health institutes.

Section: Resultsmentioning

confidence: 99%

Location Based Services for Remote Education and Health Institutes Using Sum-Difference Signal Patterns

Int. J. Interact. Mob. Technol.

2022

“…This component offers both in-phase (sum -∑) and out-phase (difference -Δ) relationship at the designated output ports. For more details about ring coupler's usage and realization, readers are referred to [16,17,18]. Thus, in this work, the coupler has been used to obtain the Σ and the Δ of the input signal.…”

Section: Proposed Methodologymentioning

confidence: 99%

An Educational Training Kit for an Efficient GPS Anti-Jamming System

Int. J. Emerg. Technol. Learn.

Arshad

Cheema

et al. 2021

Self Cite

Global positioning system (GPS) is one of the key satellite-based radio technolo-gy providing navigational services on earth or near earth. The increasing usage of GPS applications in daily life has proved that students/researchers of many edu-cational departments including information and communication technology (ICT) are particularly interested to learn and visualize the GPS anti-jamming techniques in a simpler way in their major communication courses. It is a fact that GPS radio signal is vulnerable in various ways to jamming signals launched by malicious el-ements. The traditional available GPS anti-jamming techniques generally involve either added hardware and/or computational complexity which introduce difficul-ty for students to understand the basic concepts. As an alternative, this paper pre-sents a simpler GPS anti-jamming system kit based on L1-band (1.575 GHz) of GPS for education purpose. More specifically, the proposed antenna array, inte-grated with two couplers, cancels out the jamming signal in radio frequency (RF) domain using sum and difference patterns generated by the latter. The simulated and measured results, in terms of scattering parameters and power profiles, of the proposed system have shown that the jamming signal can be eliminated with less complexity. Eventually, the proposed GPS anti-jamming system has great poten-tial to be used in ICT related disciplines for learning and training purposes.

“…and M is an even number. More details about the HRR coupler and − patterns can be found in [31] and [32].…”

Section: ) Rf Coupler Based Asmentioning

confidence: 99%

Radio Source Localization in Multipath Channels Using EM Lens Assisted Massive Antennas Arrays

Tonello

2019

IEEE Access

Self Cite

The focusing ability of the lens antennas can significantly contribute to perform precise radio localization with low complexity in a massive antennas array (MAA) system. Thus, by combining lens antennas with an MAA, we propose an approach for radio source localization through an angle of arrival (AoA) estimation in a multipath propagation scenario. We discuss two simplified antenna selection techniques to select and process the focused subsets of antennas. Then, we implement a low-complexity time of arrival estimation scheme to detect the first arrival path (FAP) that contains the actual AoA information. Finally, the FAP signal is processed to estimate the AoA very efficiently, by applying one of the traditional subspace-based methods. To further simplify the system architecture with only slight degradation in performance, we also propose a mixed analog-digital AoA estimation structure based on the application of the sum-difference signal patterns technique. The simulated root mean squared error performance curves as a function of the signal-to-noise-ratio demonstrate that the proposed approach is capable of providing good AoA estimation results while considerably reducing the overall system complexity compared with the MAA system without the lens.