TY - JOUR
T1 - Fast realization of zoom-spectrum wigner-ville distribution analysis in a narrowband
AU - Tian, Feng
AU - Yang, Yi Xin
AU - Wu, Yao Zhen
AU - Yang, Long
PY - 2013/7
Y1 - 2013/7
N2 - Doppler information of line spectrum can be used to estimate the parameters of radiated noise sources on underwater target. Because of the low frequency and low speed characteristics, the Doppler frequency shift changes weakly. Its time-frequency analysis should be limited in a selected narrow-frequency bandwidth with high resolution. Wigner-Ville Distribution (WVD) has excellent time-frequency focusing property, but the amount of calculation and storage space are increased sharply with the higher calculation resolution demanding. A fast calculating method is proposed for selected bandwidth zoom WVD analysis. The method improves the Chirp-Z Transform (CZT) algorithms, and combines that with WVD, improves greatly calculation performance of high resolution zoom WVD analysis. Computer simulation and experimental result at sea demonstrate the validity of the presented method.
AB - Doppler information of line spectrum can be used to estimate the parameters of radiated noise sources on underwater target. Because of the low frequency and low speed characteristics, the Doppler frequency shift changes weakly. Its time-frequency analysis should be limited in a selected narrow-frequency bandwidth with high resolution. Wigner-Ville Distribution (WVD) has excellent time-frequency focusing property, but the amount of calculation and storage space are increased sharply with the higher calculation resolution demanding. A fast calculating method is proposed for selected bandwidth zoom WVD analysis. The method improves the Chirp-Z Transform (CZT) algorithms, and combines that with WVD, improves greatly calculation performance of high resolution zoom WVD analysis. Computer simulation and experimental result at sea demonstrate the validity of the presented method.
KW - Time-frequency analysis
KW - Underwater Doppler signal
KW - Underwater signal processing
KW - Wigner-Ville Distribution (WVD)
KW - Zoom spectrum analysis
UR - http://www.scopus.com/inward/record.url?scp=84881595626&partnerID=8YFLogxK
U2 - 10.3724/SP.J.1146.2012.01446
DO - 10.3724/SP.J.1146.2012.01446
M3 - 文章
AN - SCOPUS:84881595626
SN - 1009-5896
VL - 35
SP - 1713
EP - 1719
JO - Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology
JF - Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology
IS - 7
ER -