About the Author

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Dr. Hua Zhang is a professor at Xidian University. His research focuses on time-varying astronomical signal processing and navigation mechanism. In the past decade, he has carried out in-depth research in the processing of extremely weak signals, especially the signals from the X-ray pulsars.Dr. Luping Xu is a professor at Xidian University. He is mainly engaged in the research of signal detection and information processing, target detection and tracking, and navigation guidance and control.Dr. Jingrong Sun is an associate professor at Xidian University​. His research mainly focuses on time-varying astronomical signal processing and pulsar-based navigation.​Dr. Bo Yan is an associate professor at Xidian University​. His research mainly focuses on weak signal processing.