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Method and system for processing GPS and satellite digital radio signals using a shared LNA

  • US 7,720,434 B2
  • Filed: 10/12/2006
  • Issued: 05/18/2010
  • Est. Priority Date: 10/12/2006
  • Status: Expired due to Fees
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Assignment
First Claim
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1. A system for processing GPS and satellite digital radio signals, comprising:

  • an SDAR antenna configured to receive satellite digital radio signals, said SDAR antenna coupled to an input of a GPS block including circuitry operative to throughput satellite digital radio signals without GPS signal components;

    a GPS antenna configured to receive signals transmitted by a GPS satellite coupled to an input of an SDAR block including circuitry operative to throughput GPS signals without satellite digital radio signal components;

    a low noise amplifier having a single input electrically coupled to both an output of said GPS block and an output of said SDAR block, wherein said amplifier is configured to amplify both GPS signals received by said GPS antenna, and satellite digital radio signals received by said SDAR antenna, and provide a single, amplified signal at a low noise amplifier output comprising both satellite digital radio and GPS signal components;

    a SDAR filter including an input electrically coupled to said low noise amplifier output, said SDAR filter including circuitry operative to filter the low noise amplifier output signal such that signals other than SDAR signals are removed and remaining SDAR signals are provided to a SDAR filter output;

    a GPS filter including an input electrically coupled to said low noise amplifier output, said GPS filter including circuitry operative to filter the low noise amplifier output signal such that signals other than GPS signals are removed and remaining GPS signals are provided to a GPS filter output;

    a SDAR amplifier including an input electrically coupled to said SDAR filter output, said SDAR amplifier operative to amplify the remaining SDAR signals received from said SDAR filter;

    a GPS amplifier including an input electrically coupled to said GPS filter output, said GPS amplifier operative to amplify the remaining GPS signals received from said GPS filter;

    SDAR processing circuitry including an input electrically coupled to an SDAR amplifier output, said SDAR processing circuitry operative to receive the remaining SDAR signals receiver from said SDAR amplifier, to extract audio and/or data content from said remaining SDAR signals, and to output said audio/data to a user; and

    GPS processing circuitry including an input electrically coupled to an GPS amplifier output, said GPS processing circuitry operative to receive the remaining GPS signals receiver from said GPS amplifier, to calculate the geographical position of the system from said remaining GPS signals, and to output a signal indicative of geographical position to a user.

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