A study of coherent gain degradation due to node vibrations in open loop coherent distributed arrays

One of the primary challenges in implementing open-loop coherent distributed arrays is the requirement to measure the separation between platforms to a fraction of a wavelength. For aerial platforms operating at microwave frequencies, it is thus important to understand the effects of platform vibrat...

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Bibliographic Details
Published in2017 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) pp. 115 - 116
Main Authors Chatterjee, Pratik, Nanzer, Jeffrey A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2017
Subjects
Degradation
Doppler shift
Gain measurement
Microwave frequencies
Vibration measurement
Vibrations
Wavelength measurement
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Summary:One of the primary challenges in implementing open-loop coherent distributed arrays is the requirement to measure the separation between platforms to a fraction of a wavelength. For aerial platforms operating at microwave frequencies, it is thus important to understand the effects of platform vibration, in particular how often the range measurement must be updated in order to ensure that vibration does not sufficiently move the platforms such that the coherent gain is degraded. This paper analyzes worst-case vibration profiles for various aircraft types, showing that update rates of only 200 Hz are sufficient to ensure negligible reduction in coherent gain from platform vibration.
DOI:10.1109/USNC-URSI.2017.8074924