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. 27, 2007
Filed:
Feb. 11, 2004
Sung-eun Park, Suwon-si, KR;
Jae-yoel Kim, Gunpo-si, KR;
Dae-kwon Jung, Suwon-si, KR;
Abstract
A transmitter apparatus and method for reducing PAPR in an OFDM system. The transmitter apparatus performs a masking process on an input signal block using a plurality of mask sequences in an OFDM system, and selects a specific sequence having a lowest PAPR among IFFT-processed results. The apparatus includes a single IFFT for performing an IFFT process on the received signal block, and generating an IFFT-processed sequence; a plurality of shift registers for storing individual bits of the IFFT-processed sequence, cyclically shifting them, and generating the cyclically-shifted bits; a plurality of multiplier groups for multiplying coefficients determined by corresponding mask sequences by the output bits of the shift registers; and a plurality of adders corresponding to the plurality of multiplier groups for adding the multiplied results of the multiplier groups, thereby reducing system complexity and production costs.