Integrated Spectrum Sensing and Frequency Reconfigurable Antennas for Inter-Weave Cognitive-Radio Applications

Mohammed, Ali Abdulwahhab; Abdullah, Abdulkareem S.

doi:10.1088/1742-6596/1804/1/012053

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…Various frequency reconfiguration techniques are used in satellite communications to optimize performance, increase measurement accuracy, and ensure reliable communication under different conditions. Frequency reconfiguration algorithms used in satellite communications include dynamic spectrum access (DSA) [53], cognitive radio-based frequency reconfiguration [54], frequency-hopping spread spectrum (FHSS) [55], adaptive beamforming and frequency steering [56], and adaptive modulation and coding (AMC) [57]. DSA algorithms allow satellites to adjust their frequency utilization dynamically depending on the availability of spectra in their operational environment.…”

Section: Feasibility Of Frequency Manipulationmentioning

confidence: 99%

A Study on the Derivation of Atmospheric Water Vapor Based on Dual Frequency Radio Signals and Intersatellite Communication Networks

Nyamukondiwa,

Orger,

Nakayama

et al. 2023

Aerospace

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The atmospheric total water vapor content (TWVC) affects climate change, weather patterns, and radio signal propagation. Recent techniques such as global navigation satellite systems (GNSS) are used to measure TWVC but with either compromised accuracy, temporal resolution, or spatial coverage. This study demonstrates the feasibility of predicting, mapping, and measuring TWVC using spread spectrum (SS) radio signals and software-defined radio (SDR) technology on low Earth-orbiting (LEO) satellites. An intersatellite link (ISL) communication network from a constellation of small satellites is proposed to achieve three-dimensional (3D) mapping of TWVC. However, the calculation of TWVC from satellites in LEO contains contribution from the ionospheric total electron content (TEC). The TWVC and TEC contribution are determined based on the signal propagation time delay and the satellites’ positions in orbit. Since TEC is frequency dependent unlike TWVC, frequency reconfiguration algorithms have been implemented to distinguish TWVC. The novel aspects of this research are the implementation of time stamps to deduce time delay, the unique derivation of TWVC from a constellation setup, the use of algorithms to remotely tune frequencies in real time, and ISL demonstration using SDRs. This mission could contribute to atmospheric science, and the measurements could be incorporated into the global atmospheric databases for climate and weather prediction models.

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Section: Feasibility Of Frequency Manipulationmentioning

confidence: 99%

A Study on the Derivation of Atmospheric Water Vapor Based on Dual Frequency Radio Signals and Intersatellite Communication Networks

Nyamukondiwa,

Orger,

Nakayama

et al. 2023

Aerospace

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“…A combination of dual-band and UWB antennae is utilized as communicating and sensing antennae for CR applications, respectively. The reconfiguration is accomplished using two PIN diodes connected at the communicating antenna [ 22 ]. Two PIN diodes are embedded in the UWB antenna to achieve band-notched behavior at the operating frequencies of WiMAX, WLAN, and ITU [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Filtenna with Frequency Reconfigurable Operation for Cognitive Radio and Wireless Applications

et al. 2023

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A reconfigurable wideband monopole antenna is introduced in this paper for cognitive radio and wireless applications. The reconfigurability was achieved by four varactor diodes embedded in the band pass filter (BPF) structure which was integrated with the suggested antenna through its feed line. The simulated impedance characteristics coped with the measured ones after fabricating the suggested model with/without the reconfigurable BPF. Furthermore, the model achieved the desired radiation characteristics in terms of radiation pattern with acceptable gain values at the selected frequencies within the achieved frequency range (1.3–3 GHz).

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“…In [ 22 ] reconfigurable narrow band micro strip antenna with a UWB dielectric resonator antenna (DRA) cover a bandwidth from 3–11 GHz and omnidirectional pattern provides 30 dB gain variation and 80% efficiency. A rectangular microstrip antenna with a spanner-shaped feeding line [ 23 ], printed hexagonal antenna [ 24 ] and elliptical mono-pole antenna [ 25 ] is presented for wireless application, cognitive radio application, and detection application respectively. The mono-pole antenna used in [ 26 ] is operational from 2.8–10.6 GHz achieved a gain variation of 60 dB.…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized Arc Shaped Near Isotropic Self-Complementary Antenna for Spectrum Sensing Applications

Qureshi

Basir

Subhan

et al. 2023

Sensors

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This paper presents the design of an arc-shaped near-isotropic self-complementary antenna for spectrum sensing application. An arc-shaped dipole with horizontal and vertical arms is used to achieve a near isotropic radiation pattern. The radiation pattern improved by adjusting the horizontal and vertical arm lengths. Simulated and experimental results show that the proposed antenna has an impedance bandwidth of 146% (2.4–18.4 GHz) for VSWR ≤ 2 with a good radiation pattern. In order to quantify the antenna performance, antenna gain variation, bandwidth, efficiency, and size have been compared with previously reported designs. It is shown that the proposed arc-shaped antenna can achieve nearly isotropic radiation patterns with a maximum radiation efficiency of 92%. The isotropic performance of the antenna has been characterized by observing the radiation pattern and solid angle. The FR4 substrate is used as a dielectric with relative permittivity 4.4 and loss tangent of 0.02. (εr = 4.4, h = 1.6 mm) The simulated and measured results are in good comparison, and the proposed design is a suitable candidate for spectrum sensing.

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Integrated Spectrum Sensing and Frequency Reconfigurable Antennas for Inter-Weave Cognitive-Radio Applications

Cited by 5 publications

References 13 publications

A Study on the Derivation of Atmospheric Water Vapor Based on Dual Frequency Radio Signals and Intersatellite Communication Networks

A Study on the Derivation of Atmospheric Water Vapor Based on Dual Frequency Radio Signals and Intersatellite Communication Networks

Filtenna with Frequency Reconfigurable Operation for Cognitive Radio and Wireless Applications

A Miniaturized Arc Shaped Near Isotropic Self-Complementary Antenna for Spectrum Sensing Applications

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