Title :
Interference Suppression for Ship-Based Passive Synthetic Impulse and Aperture Radar
Author :
Zhang, Yabin ; Shang, Haiyan ; Zhang, Shouhong ; Liang, Xinlan
Author_Institution :
Nat. Lab of Radar Signal Process., Xidian Univ., Xi´´an
Abstract :
Interference statistic characteristic is theoretically analyzed in ship-based passive synthetic impulse and aperture radar (SIAR) scenario. Covariance matrix at interested range bin is estimated using echoes from some positive and all negative frequency range bins after stretching with cosine weight for co-channel interference suppression. Thereafter, Karhunen-Loeve transformation is applied to the echo received for co-channel interference suppression provided that its power is stronger than radar echoes. Meanwhile, the suppression approach of nonstationary interference owing to multipath propagation is proposed whereby fast-time STAP updated for PRI to PRI, while the slow-time statistical properties of first order sea clutter output are unaffected by fast-time STAP fluctuation. Effectiveness of interference suppression is confirmed by real data
Keywords :
Karhunen-Loeve transforms; cochannel interference; covariance matrices; interference suppression; radar clutter; radar cross-sections; space-time adaptive processing; statistics; synthetic aperture radar; Karhunen-Loeve transformation; co-channel interference suppression; cosine weight; covariance matrix; fast-time STAP; frequency range bins; multipath propagation; nonstationary interference; radar echoes; sea clutter output; ship-based passive synthetic impulse and aperture radar; slow-time statistical properties; Clutter; Covariance matrix; Fluctuations; Frequency estimation; Interchannel interference; Interference suppression; Passive radar; Radar theory; Statistical analysis; Synthetic aperture radar;
Conference_Titel :
Signal Processing, 2006 8th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-9736-3
Electronic_ISBN :
0-7803-9736-3
DOI :
10.1109/ICOSP.2006.346009
