State Monitoring and Health Evaluation for Transmitter Using CHMM

According to the needs of conditional-based maintenance for electronic system, the paper presents a novel method to monitor transmitter's state and evaluate its health. Through analyzing transmitter's key signal, the corresponding wavelet features can be extracted and are further sent to CHMM used as the state monitor to calculate the Kullback-Leibler (KL) distance of unknown state, and thus, transmitter's incipient fault process can be converted into the obvious change of KL distance successfully. Based on the KL distance, transmitter's health can be correctly evaluated and it becomes easy to decide to repair it or not. Finally the tested performance of the proposed method indicates that the method is effective and provides basis for condition-based maintenance.