Journal of University of Chinese Academy of Sciences >
UFMC waveform design for L-band digital aeronautical communication systems
Received date: 2024-04-24
Revised date: 2024-08-22
Online published: 2024-09-24
The L-band digital aeronautical communication system （LDACS） is one of the primary candidate solutions for future aviation broadband communication. The spectrum of the LDACS system is embedded between adjacent channels of the distance measuring equipment （DME）. The orthogonal frequency-division multiplexing （OFDM） modulation technique it employs results in significant out-of-band radiation， causing some interference with the DME system. Additionally， the OFDM waveform has a relatively low frequency band utilization. To address these issues， a waveform design method for LDACS based on universal-filtered multi-carrier （UFMC） is proposed. Initially referencing the OFDM configuration of the LDACS system， a transceiver framework based on UFMC is designed. Subsequently， Chebyshev prototype filters are chosen， and a method involving interpolation masking is employed to design sharp cutoff filters suitable for the UFMC system. Finally， the performance is compared with LDACS systems based on OFDM and filtered OFDM. Simulation results indicate that the UFMC waveform design method， while maintaining system error rates， achieves lower out-of-band radiation， reduced peak to average power ratio， and improved time-frequency efficiency.
Lei WANG , Yehan GUI . UFMC waveform design for L-band digital aeronautical communication systems[J]. Journal of University of Chinese Academy of Sciences, 2026 , 43(5) : 641 -649 . DOI: 10.7523/j.ucas.2024.070
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