Blind estimation of the modulation index of a USB waveform in TT&C signal

Zi Yue Chu, De Cai Zou, Xue Wang, Hang Zhao, Peng Shang

科研成果: 期刊稿件文章同行评审

3 引用 (Scopus)

摘要

The parameter analysis of satellite tracking, telemetry, and command signal is necessary for space situational awareness. Unified S-Band (USB) waveforms are widely used in space missions. As a crucial parameter of the USB waveform, the modulation index influences the power distribution and spectrum characteristics of the waveform. This paper proposes two novel blind estimation methods of the modulation index based on spectral analysis. The equations for estimating the modulation index are constructed by the relation between the spectral characteristics and the Fourier transform of signal. The theoretical analysis of the estimation error of the methods is derived. The factors that influence the estimation error are investigated by Monte Carlo simulation, and an actual Geostationary Earth Orbit satellite signal is used to verify the methods. The proposed methods have lower complexity than existing methods, while also providing more than 10 times accuracy improvement at low signal-to-noise ratios. Suggestions for the application of the proposed methods to different scenarios are also provided.

源语言英语
页(从-至)325-335
页数11
期刊Telecommunication Systems
80
3
DOI
出版状态已出版 - 7月 2022
已对外发布

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