System and method for scrambling using a bit scrambler and a phase scrambler

Patent metadata

Field	Value
Publication number	US-9014243-B2
Application number	US-201213718016-A
Country	US
Kind code	B2
Filing date	Dec 18, 2012
Priority date	Nov 9, 1999
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

A system and method that demodulates the phase characteristic of a carrier signal are described. The scrambling of the phase characteristic of each carrier signal includes associating a value with each carrier signal and computing a phase shift for each carrier signal based on the value associated with that carrier signal. The value is determined independently of any input bit value carried by that carrier signal. The phase shift computed for each carrier signal is combined with the phase characteristic of that carrier signal so as to substantially scramble the phase characteristic of the carrier signals. Bits of an input signal are modulated onto the carrier signals having the substantially scrambled phase characteristic to produce a transmission signal with a reduced PAR.

First claim

What is claimed:

1. A method, in a multicarrier communications transceiver comprising a bit scrambler followed by a phase scrambler, comprising:
scrambling, using the bit scrambler, a plurality of input bits to generate a plurality of scrambled output bits, wherein at least one scrambled output bit is different than a corresponding input bit;
scrambling, using the phase scrambler, a plurality of carrier phases associated with the plurality of scrambled output bits;
transmittin…

Assignees

• Tq Delta Llc

Inventors

• Tzannes Marcos C

Classifications

• H04L27/2627 Primary

  Electricity · mapped topic

• H04L27/2621 Primary

  Electricity · mapped topic

• H04L27/2614

  Electricity · mapped topic

• H04L25/03866

  Electricity · mapped topic

• H04L27/2601

  Electricity · mapped topic