Rafael Advanced Defense Systems has been granted a patent for a process that efficiently manages spectrum allocation for communication between moving platforms and ground stations using directional antennas. The method involves generating a ranking list and recalculating frequency allocations based on user interference data. GlobalData’s report on Rafael Advanced Defense Systems gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Rafael Advanced Defense Systems, AI assisted drone control was a key innovation area identified from patents. Rafael Advanced Defense Systems's grant share as of February 2024 was 44%. Grant share is based on the ratio of number of grants to total number of patents.
Efficient spectrum management for communication between moving platforms and ground stations
The granted patent (Publication Number: US11902821B2) discloses a process for determining frequency allocations to enhance spectrum management and reuse in communication between multiple users on moving platforms and ground stations utilizing directional antennas. The process involves generating a preferential ranking list and recalculating frequency allocations based on this list and user-to-user interference data. The user-to-user interference data is updated in real-time and various inputs such as spectral bandwidths, frequency utilization order, platform priority ranking, and geographic locations are considered in the process.
Furthermore, the process provides outputs of frequency and bandwidth allocations for each link, considering up-link and down-link channels that may or may not share the same frequency spectra. The frequency allocation sizes are selected from a group of pre-defined sizes to ensure efficient spectrum utilization without leaving gaps. Additionally, the process involves pairing ground stations and moving platforms based on predefined criteria or randomly, and generates tables for platform viewed angles and Received Signal Strength Indication (RSSI) to compute signal-to-interference ratios. An interference Boolean matrix is also generated to identify potential interference between platforms using the same frequency channel. Overall, the process aims to optimize frequency allocations for communication between moving platforms and ground stations using directional antennas, considering various factors to minimize interference and enhance spectrum efficiency.
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