Rafael Advanced Defense Systems has patented a process for efficient spectrum management and reuse in communication between moving platforms and ground stations. 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 April 2024 was 37%. 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 for efficient spectrum management and reuse in communication between multiple users of moving platforms and ground stations using directional antennas. The process involves generating a preferential ranking list and recalculating desirable 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 to the process include available spectral bandwidths, platform priority ranking, geographic locations of ground stations, and spatial gains of directional antennas used, among others.
Furthermore, the process provides outputs such as frequency allocation and bandwidth allocation for each link between ground stations and platforms. It also considers scenarios where up-link and down-link channels share the same frequency spectra or operate independently. The frequency allocations are selected from a group of pre-defined sizes to ensure efficient spectrum utilization without leaving gaps between allocations. Additionally, the process involves generating tables for platform viewed angle and Received Signal Strength Indication (RSSI) for each platform and ground station, computing signal-to-interference ratios, and creating an interference Boolean matrix 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 maximize spectrum efficiency.
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