Title :
Underdetermined DOA Estimation of LFM Signals
Author :
Zhou Zhu ; Lu Shun-jun ; Zhang Er-yang ; Li Yaomin
Author_Institution :
Coll. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., ChangSha, China
Abstract :
A method is proposed to separate received LFM signals on underdetermined hypothesis. In which the sensors is less then the signals to be separated. As LFM signal belongs to nonstationary signal, the proposed method is based on Time Frequency Distribution (TFD) analysis. Through suppressing the cross term of the TFD, auto term become prominent. A rotation way utilizing the auto term points is presented, by which the TFD area of each LFM signal is classified. Using the STFD matrices corresponding to the auto term points, the Direction Of Arrival (DOA) of each LFM signal can be estimated individually. Through simulation, it is proved that the proposed method is effective.
Keywords :
direction-of-arrival estimation; frequency modulation; matrix algebra; time-frequency analysis; STFD matrices; TFD analysis; autoterm points; direction-of-arrival estimation; linear frequency modulation; nonstationary signal; received LFM signal separation; time-frequency distribution analysis; underdetermined DOA estimation; underdetermined hypothesis; Decision support systems; Direction of arrival estimation; Estimation; Sensors; Source separation; Time frequency analysis; Transforms; DOA; LFM; STFD matrix; underdetermined BSS;
Conference_Titel :
Instrumentation, Measurement, Computer, Communication and Control (IMCCC), 2012 Second International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4673-5034-1
DOI :
10.1109/IMCCC.2012.209
