These handoffs present added design challenges that include not just the management of the doppler predistortion, but also the use of beamforming antenna. The limited period that any one satellite is in line of sight for communication adds need to provide handoffs, switching from one satellite to the next, to provide uninterrupted communication. Capturing the effects of signal fading and large doppler shifts due to the speed of travel of a Satellite in LEO can be a challenge for any analysis or simulation. This panel, produced in partnership with GVF, will examine various new and existing technologies supporting interference prevention.Ī physics-based simulation of a satellite constellation, or a constellation digital twin, can provide great insight on how the modulated waveform of a datalink will be impacted by satellite kinematics.
MARIST COLLEGE MAC ETHERNET VERIFICATION
Other technologies to mitigate interference are under development such as an ESA-funded novel approach to conducting on-site antenna verification using Unmanned Aerial Systems, or drones, avoiding the need to transport antennas under test to an outdoor far-field antenna range, the traditional method which is expensive and logistically difficult. The satellite industry has developed RFI mitigation techniques, including Carrier Identification (CID), and advanced monitoring and geolocation technologies.
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LEO and MEO constellations bring new challenges to the industry as it seeks to prevent interference.
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Unintentional RFI can also be the result of overlap between signals used to communicate with satellites and those used for terrestrial networks. About 98% of radio frequency interference is unintentional, caused by human error, cross polarisation, faulty equipment, or adjacent satellite interference.