Study of Reentry Telemetry Signal in the Environment of Soft Demodulation

Abstract:

PCM/FM system is one of the most widely used in the rocket telemetry system. Target spacecraft reentry telemetry telemetry signals in the process of low signal noise ratio (SNR), that the breakthrough tradition demodulation method of demodulation threshold problem, combined with the PCM/FM signal phase characteristic, the research based on a baseband complex rotating orthogonal symbol detection software (MSD) to solve method, and the corresponding synchronization algorithm is applied to ensure the smooth operation of the demodulation. The simulation and test results verified the soft demodulation algorithm can make the demodulation threshold effectively reduce.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 3926-3929
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.3926
• Online since: July 2014
• Authors: Gang Fu*, Min Tao, Qian He
• Keywords: PCM/Fm, Reentry Telemetry, Soft Demodulation

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