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:
Jan. 09, 2007
Filed:
Dec. 02, 2002
Applicants:
Kazuyuki Hori, Tokyo, JP;
Toshiaki Kurokawa, Yokohama, JP;
Shouhei Murakami, Yokohama, JP;
Masamitsu Nishikido, Yokohama, JP;
Norie Hara, Hiratsuka, JP;
Inventors:
Kazuyuki Hori, Tokyo, JP;
Toshiaki Kurokawa, Yokohama, JP;
Shouhei Murakami, Yokohama, JP;
Masamitsu Nishikido, Yokohama, JP;
Norie Hara, Hiratsuka, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 25/49 (2006.01);
U.S. Cl.
CPC ...
Abstract
Unlike a prior art digital predistortion compensation device for determining a compensation coefficient based on absolute value information about a baseband complex input signal, the present invention performs distortion compensation calculation in accordance with a complex coefficient polynomial using real and imaginary parts of the baseband complex input signal as its variables.