|
|
|
| Interference Suppression for Ship-Based Passive Synthetic Impulse and Aperture Radar |
| Zhang Ya-bin①②; Chen Bai-xiao①; Zhang Shou-hong①; Shang Hai-yan① |
| ①National Lab of Radar Signal Processing, Xidian University, Xi’an 710071, China; ②ShaanXi Meteorological Bureau, Xi’an 710016, China |
|
|
|
|
Abstract Interference statistic characteristics are analyzed in ship-based passive synthetic Impulse and Aperture Radar (SIAR). After estimating covariance matrix at range bin interested using data from some positive and all negative frequency bins with cosine weights, eigen-decomposition is applied to interested data for co-channel interference suppression provided that its power is stronger than target echoes. Meanwhile, improved suppression approach to nonstationary interference from multipath propagation is proposed by forming adaptive STAP in fast-time domain and maintaining slow-time statistical properties of the first order sea clutter output approximately unperturbed by filter fluctuation. Analysis and suppression approach are verified by real data.
|
|
Received: 13 June 2006
|
|
|
|
|
|
|
|
|
2008, Vol. 30 
