Accession Number : ADD011833

Title :   Pulse Compression System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Lewis,B L

Report Date : 04 Jun 1985

Pagination or Media Count : 14

Abstract : This patent describes a system for polyphase encoding transmitted pulses of energy and for decoding the received signals to enhance returns from the range interval being examined during a particular processing period and attenuate returns from contiguous range intervals (pulse compression). The system includes a decoding device which comprises a delay circuit having N distributed outputs including its input for producing a uniform delay between adjacent outputs corresponding to N inputted elements of received phase-coded signal of length N squared; a conjugator circuit coupled to the first N/2 successive outputs of the delay circuit; a first signal-combining circuit coupled to the conjugator circuit and to the last N/2 successive outputs of the delay circuit; a multiplier circuit coupled to the first signal-combining circuit; and a second signal-combining circuit coupled to the multiplier circuit. The decoding device provides a decoding phase shift to the signal elements of the phase-coded signal.

Descriptors :   *PATENTS, *PULSE CODE MODULATION, *DECODERS, PULSE COMPRESSION, *SIGNAL PROCESSING, DECODING, CODING, PHASE SHIFT CIRCUITS, DELAY CIRCUITS, RECEIVERS, FREQUENCY MULTIPLIERS, CIRCUIT ANALYSIS, DATA COMPRESSION, DISTRIBUTION, DELAY, SIGNAL TO NOISE RATIO, LENGTH, INTERVALS, PHASE, ENERGY, OUTPUT, PHASE SHIFT

Subject Categories : Electrical and Electronic Equipment
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE