LEO Satellite Multibeam Coverage Area Division and Beamforming Method

Zhong, Kai; Cheng, Yu Jian; Yang, Hai Ning; Zheng, Bin

doi:10.1109/lawp.2021.3099104

Cited by 11 publications

(2 citation statements)

References 23 publications

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“…In order to serve as many users/devices on Earth as possible with sufficient quality of service, multiple input, multiple output (MIMO) approaches have been proposed to be used both onboard LEO satellites and on user devices [50], [51]. Various antenna array structures have been proposed, such as interlaced triangular lattice antenna arrays [52] or multi-beam phased arrays [53], [54]. The current general understanding is that a large number of beams will be supported at the satellite side, the ground station side, or both.…”

Section: E Beamforming Aspectsmentioning

confidence: 99%

Position, Navigation, and Timing (PNT) Through Low Earth Orbit (LEO) Satellites: A Survey on Current Status, Challenges, and Opportunities

et al. 2022

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More and more satellites are populating the sky nowadays in the Low Earth orbits (LEO). Most of the targeted applications are related to broadband and narrowband communications, Earth observation, synthetic aperture radar, and internet-of-Things (IoT) connectivity. In addition to these targeted applications, there is yet-to-be-harnessed potential for LEO and positioning, navigation, and timing (PNT) systems, or what is nowadays referred to as LEO-PNT. No commercial LEO-PNT solutions currently exist and there is no unified research on LEO-PNT concepts. Our survey aims to fill the gaps in knowledge regarding what a LEO-PNT system entails, its technical design steps and challenges, what physical layer parameters are viable solutions, what tools can be used for a LEO-PNT design (e.g., optimisation steps, hardware and software simulators, etc.), the existing models of wireless channels for satellite-toground and ground-to-satellite propagation, and the commercial prospects of a future LEO-PNT system. A comprehensive and multidisciplinary survey is provided by a team of authors with complementary expertise in wireless communications, signal processing, navigation and tracking, physics, machine learning, Earth observation, remote sensing, digital economy, and business models.

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Section: E Beamforming Aspectsmentioning

confidence: 99%

Position, Navigation, and Timing (PNT) Through Low Earth Orbit (LEO) Satellites: A Survey on Current Status, Challenges, and Opportunities

et al. 2022

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“…Pattern synthesis techniques based on perturbation of Woodward-Lawson solutions, 6 Elliott's linear array synthesis method, 7 and Fourier transform based approaches 8 are used to synthesize less complex patterns like flat-topped circular, square beam patterns. An active phased array, with digital beamforming using the subarrays generate a contour-shaped pattern 9,10 where the total number of independent beams is fixed and depends upon the number of subarrays. These methods are computationally intensive, limited by fixed patterns, and used when the desired patterns are not too complex.…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional shaped and contour pattern synthesis with multiple beam approach

Prasad

Meenakshi

Rao

2022

Micro & Optical Tech Letters

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A multiple-beam synthesis method is proposed to generate three-dimensional (3D) shaped and contour patterns from a planar phased array antenna. Threedimensional radiation patterns are synthesized primarily with optimum beam positions and variable mainbeam power levels of multiple beams, followed by calculating the resultant element weights. Contour patterns are synthesized from multiple beam peaks by mapping the individual beam power levels to their corresponding 3 dB beamwidth coverage areas at each designated location on the contour. The far-field contour shape affected by the influence of the element pattern, mutual coupling, and scan loss is compensated by the peak power of the scanned beam patterns. The proposed synthesis supports dynamically changeable contour shapes. Flat-topped, stepped 3D patterns and arbitrary contour shapes with shaped null zones inside the contour are simulated and implemented on a 16 × 16 element 5G mmWave planar phased array. Measured radiation patterns are compared with simulations and presented.

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Digital Precoders for Partially Spectral Overlapping Subarrays in mmWave Satellite Communications

Hsiao,

Ku,

Song

2024

IEEE Access

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LEO Satellite Multibeam Coverage Area Division and Beamforming Method

Cited by 11 publications

References 23 publications

Position, Navigation, and Timing (PNT) Through Low Earth Orbit (LEO) Satellites: A Survey on Current Status, Challenges, and Opportunities

Position, Navigation, and Timing (PNT) Through Low Earth Orbit (LEO) Satellites: A Survey on Current Status, Challenges, and Opportunities

Three‐dimensional shaped and contour pattern synthesis with multiple beam approach

Digital Precoders for Partially Spectral Overlapping Subarrays in mmWave Satellite Communications

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