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Device for generating a digitally modulated test signal

  • US 7,158,564 B1
  • Filed: 08/28/2000
  • Issued: 01/02/2007
  • Est. Priority Date: 11/26/1999
  • Status: Expired due to Term
First Claim
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1. A method for generating a digitally modulated test signal comprising:

  • generating a first group of transmission channels comprising I and Q values, in a modulation coder, directly from a modulation data stream according to a predetermined standard;

    generating a second group of transmission channels comprising I and Q values by repeating a pre-calculated data sequence of limited length, said pre-calculated data sequence being recalled from a memory of a modulation coder;

    adding said I and Q values of said first group and said second group; and

    feeding the result to an I/Q modulator to generate said test signal.

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