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System and method for accurate downlink power control of composite QPSK modulated signals

  • US 8,189,708 B2
  • Filed: 08/08/2008
  • Issued: 05/29/2012
  • Est. Priority Date: 08/08/2008
  • Status: Active Grant
First Claim
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1. A method for controlling code power levels of individual codes of a composite quadrature phase shift keyed (QPSK) signal, the method comprising:

  • obtaining a sample of said composite QPSK signal;

    separating said individual codes from said composite QPSK signal, the separating being done by using a plurality of navigation data codes;

    analyzing said individual codes against corresponding commanded code power settings for said individual codes; and

    determining a code power correction signal needed for each of said individual codes needed to adjust a code power for each of said individual codes to match their said corresponding commanded code power settings, to thus drive a code power error between said individual codes and their said corresponding commanded code power settings to zero.

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