Space-Time Adaptive FIR Filtering with Staggered PRI
Abstract
Space-time least squares far infrared radiation (FIR) filters have shown excellent clutter rejection performance at extremely low computational loads, allowing ground moving target indication (GMTI) to be carried out in real-time. Staggering the pulse repetition interval (PRI) is an appropriate way of avoiding Doppler ambiguities and blind velocities. Fully adaptive space-time processors can cope well with staggered echo data. FIR filtering techniques are based on constant PRI and, therefore, will suffer some degradation if the radar pulses are staggered. This paper presents the concept of re-adaptation of the FIR filter coefficients at each PRI. It is shown by simulations that the total loss caused by staggering the PRI is of the order of magnitude of a few dB. However, applying a constant FIR filter to staggered data results in dramatic losses in signal-to-clutter plus noise ratio. (8 figures, 11 refs.)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 14, 2001
- Accession Number
- ADA422432
Entities
People
- R. Klemm