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Liu Yongtan

Liu Yongtan

Signal and Information Processing



Born in Nanjing, Jiangsu Province in December 1936, Professor Liu Yongtan is an expert of electronic engineering. He was enrolled into Harbin Institute of Technology in 1953, studying in the Department of Electrical Machine. He then was sent to the Department of Radio Engineering, Tsinghua University for further study in 1956. From 1958 onward, he worked as a professor, a doctoral supervisor, the director of Institute of Electronic Engineering and Technology, Harbin University and member of the Committee of Science and Technology of the Ministry of Aeronautics and Astronautics, research fellow of the Ministry of Aeronautics and Astronautics and member of the Chinese Radar Society respectively. Now he is professor at the School of Electronic and Information, Shanghai Jiao Tong University. In 1991 he was elected academician of the Chinese Academy of Sciences and academician of the Chinese Academy of Engineering in 1994.

In the development of a new system of sea detector radar, professor Liu made breakthroughs in eleven key technologies, solving the problems in signal process and object detection when there were strong sea clutters, radio frequency interference and atmospheric radio noise. He set up the first new system of sea detector radar station in China. In the new radar system, technologies have been adopted for the first time for CW, LFM, PN code amplitude modulation signal and the associated dechirp matched filter and high resolution Doppler detector. The National Science and Technology Progress Prize (1st class) was awarded for this accomplishment in 1991. With his supervision, a development was made in a large dynamic, high accurate and real-time two-dimension FFT signal processor with a receiving channel of high linearity, a technology was developed during digital compensation with channel consistency, and a fast and optimized approach to an adoptive multi-object tracking system was taken. In the research of ISAR, Professor Liu developed a motion compensation theory and a new compensation theory for large bandwidth signal & system. In the development of a digital broadband FM/CW radar signal processor, a unique analog/digital mixed signal processing module has been worked out that has incorporated slide window simulation controlled by micro program, segmental FFT analysis and digital RCS automatic detection, processing the spectral analysis with a high resolution of a large dynamic bandwidth signal. Professor Liu has had some seventy articles and monographs published. He was given the title of the National Young and Middle Aged Expert with outstanding achievements in 1990.

Research field

Array Signal Processing and Faint Signal Detection