The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2008
Filed:
Jun. 01, 2005
Young-seo Park, Sunrise, FL (US);
Lavanya Doblatyvenkata, Plantation, FL (US);
Young-Seo Park, Sunrise, FL (US);
Lavanya Doblatyvenkata, Plantation, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A system and a method to enlarge the minimum signal of a linear modulation signal () including multi-carrier modulation, such as Scalable advanced Modulation or Orthogonal Frequency Division Multiplexing, are disclosed. A minimum enlarger () exploits a simple amplitude limiter () so as not to interfere with an existing peak suppression scheme. The amplitude limiter () enlarges local minimum amplitude values to a predetermined minimum amplitude threshold if the local minimum amplitude values are less than the predetermined minimum amplitude threshold. While the amplitude limiter () adjusts the local minimum amplitude values in the linear modulation signal (), the phase of the linear modulation signal () is maintained. The conditioned linear modulation signal () increases the efficiency of a linear power amplifier (). The spectral change of the linear modulation signal due to the disclosed scheme is negligible because the adjusted signal power is negligible.