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Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships

  • US 7,515,896 B1
  • Filed: 04/14/2000
  • Issued: 04/07/2009
  • Est. Priority Date: 10/21/1998
  • Status: Expired due to Fees
First Claim
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1. A method for down-converting an electromagnetic signal, comprising the steps of:

  • (1) simultaneously down-converting and performing a matched filtering/correlating operation on a portion of an initially received carrier signal, wherein said down-converting and said performing a matched filtering/correlating operation are performed in a single operation;

    (2) accumulating the result of the matched filtering/correlating operation of step (1); and

    (3) repeating steps (1) and (2) for additional portions of the carrier signal,wherein step (1) comprises the step of convolving an approximate half cycle of the carrier signal with a representation of itself.

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