학술논문
Order-adaptive frequency trackers for direct-to-Earth Mars communications
Document Type
Conference
Author
Source
2009 IEEE/SP 15th Workshop on Statistical Signal Processing Statistical Signal Processing, 2009. SSP '09. IEEE/SP 15th Workshop on. :61-64 Aug, 2009
Subject
Language
ISSN
2373-0803
Abstract
During the entry, descent and landing phase (EDL) of the missions to Mars, the spacecraft's high dynamics imprints severe Doppler swings on the signals transmitted via the direct-to-Earth (DTE) channel. In order to recover the data that record the mission status from the received signal, a reliable estimate of the Doppler profile is required. We extend previous work by developing order-adaptive schemes that enforce frequency continuity and improve tracking performance and, as a result, the overall frequency mean-square error as well.