US 8,718,158 B2
System and method for scrambling the phase of the carriers in a multicarrier communications systemGeneral
US 8,718,158 B2
System and method for scrambling the phase of the carriers in a multicarrier communications system
Tech Center:
2600 Communications
Examiner:
Phuong Phu
Art Unit:
2632 Digital and Optical Communications
Agent:
Inventors:
Marcos C. Tzannes
Assignee:
Priority:
11/09/99
Filed:
11/23/11
Granted:
05/06/14
Expiration:
06/13/22
Abstract
A system and method that scrambles 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.
Cooperative Patent Classification (CPC)
H04H04L25/03866H04B1/40H04L