Title :
A new AOA estimation algorithm of wideband chirp signals
Author :
Wen, Zhong ; Li, Liping
Author_Institution :
Coll. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A novel time-frequency approach to the direction finding of a wideband chirp source is proposed. Our technique to construct virtual sensors employs the characteristic that the direction vector of a wideband chirp signal is an arithmetic progression. By the time-frequency selectivity of the Wigner-Ville distribution, a new data model is constructed to estimate the 2D AOA of each signal one by one. A Radon transformation is used to suppress noise and the cross-terms of signals. The computation cost of the method is low because no focusing and interpolating is needed, even no singular value decomposition is needed. Simulation results illustrate the performance of the method.
Keywords :
Radon transforms; Wigner distribution; array signal processing; chirp modulation; direction-of-arrival estimation; interference suppression; random noise; time-frequency analysis; AOA estimation algorithm; Radon transform; Wigner-Ville distribution; arithmetic progression; array signal processing; computation cost; direction finding; direction vector; noise suppression; signal cross-terms; time-frequency approach; virtual sensors; wideband chirp signals; Arithmetic; Chirp; Computational efficiency; Educational institutions; Frequency estimation; Interpolation; Signal processing; Signal processing algorithms; Time frequency analysis; Wideband;
Conference_Titel :
Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on
Print_ISBN :
0-7803-8647-7
DOI :
10.1109/ICCCAS.2004.1346309
