Accession Number:

AD0904853

Title:

Adaptive Filtering in AMTI Radar.

Descriptive Note:

Final rept.,

Corporate Author:

TECHNOLOGY SERVICE CORP SANTA MONICA CA

Personal Author(s):

• Bottlik, Ivan P.
• Brennan, Lawrence E.
• Lank, Gerald W.

Report Date:

1972-09-29

Pagination or Media Count:

109.0

Abstract:

Adaptive filtering is a technique for optimizing the doppler filter response in an MTI moving target indication radar. In airborne MTI radars, the clutter spectrum is continually changing and varies with scan angle, antenna pattern, and angular distribution of the clutter intensity. Rain backscatter, if present, has a doppler spectrum which depends on local wind velocity and wind shear. An adaptive filter senses each of these effects and adaptively controls the filter weights to maximize the signal-to-clutter ratio in the filter output. Curves are presented in this report which illustrate the performance of adaptive filters in AMTI radar. The steady-state and transient response of adaptive filters, and performance in rain, are included. Methods of simplifying adaptive filter control loops are discussed. Author

Descriptors:

• *TRANSIENTS
• BACKSCATTERING
• RAIN
• RESPONSE
• GAIN
• RADAR CLUTTER
• EQUATIONS
• ANTENNA RADIATION PATTERNS
• DOPPLER EFFECT

Subject Categories:

• Numerical Mathematics
• Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE