System and method for scrambling the phase of the carriers in a multicarrier communications system

CAFC
  • US 8,718,158 B2
  • Filed: 11/23/2011
  • Issued: 05/06/2014
  • Est. Priority Date: 11/09/1999
  • Status: Expired due to Term
First Claim
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1. In a multicarrier modulation system including a first transceiver in communication with a second transceiver using a transmission signal having a plurality of carrier signals for modulating a plurality of data bits, each carrier signal having a phase characteristic associated with at least one bit of the plurality of data bits, a method for scrambling the phase characteristics of the carrier signals comprising:

  • transmitting the plurality of data bits from the first transceiver to the second transceiver;

    associating a carrier signal with a value determined independently of any bit of the plurality of data bits carried by the carrier signal, the value associated with the carrier signal determined by a pseudo-random number generator;

    determining a phase shift for the carrier signal at least based on the value associated with the carrier signal;

    modulating at least one bit of the plurality of data bits on the carrier signal;

    modulating the at least one bit on a second carrier signal of the plurality of carrier signals.

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