Accession Number:

ADD014187

Title:

Efficient Adaptive Filter Bank.

Descriptive Note:

Patent, Filed 10 Jan 84, patented 24 Mar 87,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

• Lewis, Bernard L.

Report Date:

1987-03-24

Pagination or Media Count:

7.0

Abstract:

An N-point Fourier transform circuit for a moving target indicator system including a delay circuit with 2N-2 delays, N frequency filters, a processor for forming a main signal and N-1 auxiliary signals via time sample manipulation, a Gram-Schmidt adaptive canceller circuit for decorrelating the N-1 auxiliary signals from the main signal, and a first and second commutating switches. The first switch tracks a given set of N time samples through the delay circuit. The second switch switches the given set of N time samples through a different successive frequency filters of the N frequency filters every transmission. The first switch tracks in synchronism with the second switch and switches to obtain a new given set of N time samples every NT seconds. Radar PAT-CL-342-160. jes

Descriptors:

• *RADAR
• COMMUTATORS
• DELAY CIRCUITS
• FILTERS
• FREQUENCY
• MOVING TARGET INDICATORS
• SAMPLING
• SIGNALS
• SWITCHES
• TIME

Subject Categories:

• Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE