Title:
SPECTRUM ANALYSIS METHOD, DISTORTION DETECTION DEVICE, AND DISTORTION COMPENSATION AMPLIFICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/082681
Kind Code:
A1
Abstract:
There are provided a spectrum analysis method, a distortion detection device, and a distortion compensation amplification device capable of increasing the time/frequency conversion speed and reducing the compensation coefficient convergence time. The distortion detection device detects distortion in a frequency region of an input signal and includes: a time window processing unit for multiplying the input signal with the time window; an averaging unit for averaging the output of the time window processing unit; an FFT processing unit (52) for converting the output of the averaging unit from the time region to the frequency region; and a distortion extraction unit (53) for extracting a distortion component from the output of the FFT processing unit (52).
Inventors:
MIYATANI TETSUHIKO (JP)
NAITO MASASHI (JP)
HONGO NAOKI (JP)
OKAZAKI TAKASHI (JP)
NAITO MASASHI (JP)
HONGO NAOKI (JP)
OKAZAKI TAKASHI (JP)
Application Number:
PCT/JP2005/021254
Publication Date:
August 10, 2006
Filing Date:
November 18, 2005
Export Citation:
Assignee:
HITACHI INT ELECTRIC INC (JP)
MIYATANI TETSUHIKO (JP)
NAITO MASASHI (JP)
HONGO NAOKI (JP)
OKAZAKI TAKASHI (JP)
MIYATANI TETSUHIKO (JP)
NAITO MASASHI (JP)
HONGO NAOKI (JP)
OKAZAKI TAKASHI (JP)
International Classes:
G01R23/16; H03F1/32; H04B1/04; H04L27/00
Foreign References:
| JP2004121625A | 2004-04-22 |
Attorney, Agent or Firm:
Akazawa, Hideo (5-1 Nakano 4-chome, Nakano-k, Tokyo 01, JP)
Download PDF: