Accession Number : ADD009071

Title :   Precompression Bandwidth-Tolerant Digital Pulse Compressor.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kretschmer,Frank F

Report Date : 27 Nov 1981

Pagination or Media Count : 21

Abstract : This invention relates generally to polyphase code systems and more particularly to digital systems for decoding sequences of polyphase encoded signals. In a conventional radar, the transmitted waveform is a train of pulses as shown. The average power is determined by the peak power and the duty ratio, that is to say the ratio of the width of the pulses to the overall repetition period T. T is generally fixed by the maximum unambiguous range, and tau by the resolution required. Thus, to improve the detectability of the radar only the peak power can be increased and this is limited by the components used. There is therefore a conflict of interests if both improved detectability and resolution are required.

Descriptors :   *Patent applications, *Decoders, *Radar receivers, Pulse modulation, Pulse compression, Bandwidth, Shift registers, Autocorrelation, Matched filters

Subject Categories : Cybernetics
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE