OTFS MODULATION FOR THE AMT ENVIRONMENT

Orthogonal Time Frequency Space (OTFS) is a new modulation designed to operate in the high mobility/high-Doppler environment that is closely related to 5G’s Orthogonal Frequency Division Multiplexing (OFDM). OFDM has been investigated for use in the next generation telemetry sys tems, but performance can suffer at high test article (TA) speeds due to rapid variations in the time-frequency channel response and inter-carrier interference (ICI) resulting from Doppler shifts. This paper presents an overview of OTFS and an exemplary OTFS system that can operate at high TA speeds in the Aeronautical Mobile Telemetry (AMT) environment to showcase advantages over OFDM such as resistance to ICI and jamming, lower peak to average power ratio (PAPR), and better spectral efficiency. Future areas of research unique to the AMT use case are discussed.