Abstract

This paper presents the design and performance of an Adaptive Orthogonal Frequency Division Multiplexing (AOFDM) modulation system for aeronautical telemetry. This work takes advantage of the quasi-stationary behavior of aeronautical channels. Such channels dominate most aeronautical applications and justify special treatment. Our result shows that AOFDM increases the overall data transmission by enabling high data rates (6 bits/tone) for selective tones, simultaneously reducing unnecessary errors by avoiding tones degraded by the Channel. It also allows operation on poor channels with an 8dB signal to noise ratio (SNR). We also demonstrated the quasi-stationarity nature of the 2-ray aeronautical Channel and the feasibility of a backchannel at a low data rate. The AOFDM system learns the performance of each OFDM tone and adjusts the modulation to optimize the performance. Such a design demonstrates a significant enhancement of spectrum efficiency compared to current modulation schemes used.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.