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Systems and methods for synchronous detection of signals

  • US 7,126,323 B1
  • Filed: 07/26/2004
  • Issued: 10/24/2006
  • Est. Priority Date: 07/25/2003
  • Status: Expired due to Fees
First Claim
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1. A method for synchronous detection of a pulsed signal in a transmit-receive detection system comprising:

  • transmitting at least one transmitted signal, said signal having a frequency, continuously for a period of time;

    receiving a return signal on at least one sensor, said return signal corresponding to said transmitted signal;

    synchronously demodulating said return signal to calculate the relative magnitudes and phases between said at least one return signal and said at least one transmitted signal;

    ceasing to transmit said transmitted signal;

    after ceasing to transmit said transmitted signal, continuing to demodulate said return signal whereby a timing relationship with said at least one transmitted signal is maintained.

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