Accession Number : ADD017885

Title :   MTI Using a Polyphase Code.

Descriptive Note : Patent, Filed 28 Jan 83, patented 31 Oct 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kretschmer, Frank F , Jr

Report Date : 31 Oct 1995

Pagination or Media Count : 11

Abstract : An improved MTI radar system including a signal expander/compressor for providing palindromic P2 phase coded upswept and downswept expanded signals that are alternately transmitted by a radar transmitter. The echos from the upswept and downswept signals are received by a receiver, compressed in the signal expander compressor and inputted to an MTI subtractor. Since the autocorrelation sidelobes of the palindromic phase coded echos are real, the echos from stationary clutter are completely cancelled so that the system is capable of detecting weak echos from moving targets.

Descriptors :   *RADAR RECEIVERS, *PATENTS, *MOVING TARGET INDICATORS, CLUTTER, AUTOCORRELATION, CODING, SIDELOBES, PHASE SHIFT CIRCUITS

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE