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TIME-DOMAIN CORRELATOR FOR SPATIAL FILTERING IN A PULSED ENERGY SYSTEM

  • US 3,720,950 A
  • Filed: 11/28/1967
  • Issued: 03/13/1973
  • Est. Priority Date: 11/28/1967
  • Status: Expired due to Term
First Claim
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1. In a coded pulsed energy system, including an intermediate frequency receiver stage having a local oscillator input, timedomain correlation means comprising local oscillator injection means in cooperation with said intermediate frequency receiver for applying a coded periodic sampling signal at said local oscillator input of said intermediate frequency receiver stage, the sampling periodicity of which sampling signal is substantially less than the pulse repetition interval of said system and the time-phase of which sampling periodicity is discretely progressively varied each pulse repetition interval by an amount less than said sampling periodicity, and the coding of which coded sampling signal is a replica of that transmitted by said pulsed energy system;

  • and data matrix storage means responsive to said variable time-phase sampled signals for reconstructing a range trace signal having an improved range resolution corresponding to the reciprocal of the transmitted bandwidth.

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