Accession Number : ADD009588

Title :   Clutter Filter Using a Minimum Number of Radar Pulses.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hsiao,James K

Report Date : 02 Mar 1982

Pagination or Media Count : 8

Abstract : A clutter filter which reduces by (N-1) the number of input pulses required for operation of an N-pulse MTI canceler when LN consecutive filtered outputs are desired. The clutter filter includes the two channels of an N-pulse MTI canceler which weight and sum the in-phase and quadrature-phase components of N radar returns, and a pair of delay circuits which introduce a delay of N interpulse time periods to the N and subsequent in-phase and quadrature-phase components of the radar returns. The stored outputs of the two channels of the canceler and the consecutive outputs of the delay circuits are combined in a complex multiplier to generate the consecutive in-phase and quadrature-phase outputs of the filter. The clutter filter has utility in a multiple-stage filter system employing a Doppler filter as the last page. (Author)

Descriptors :   *Patents, *Radar clutter, *Moving target indicators, Radar pulses, Filters, Delay circuits

Subject Categories : Cybernetics
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE