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. 15, 2005
Filed:
Jun. 20, 2001
Toshiyuki Akiyama, Tokorozawa, JP;
Tetsuomi Ikeda, Machida, JP;
Toshiyuki Akiyama, Tokorozawa, JP;
Tetsuomi Ikeda, Machida, JP;
Hitachi Kokusai Electric, Inc., Tokyo, JP;
Nippon Hoso Kyokai, Tokyo, JP;
Abstract
A signal transmission apparatus for a digital modulation type, wherein each of information codes is assigned to any one of a plurality of signal points arranged on an I-Q complex plane, a pilot signal used for demodulating said information codes and an auxiliary signal are assigned to be arranged on signals points on the I-Q complex plane, a signal modulated based on coordinates corresponding to the assigned signal points is transmitted, the transmitted signal is received, and the received signal is demodulated to reproduce the information codes, and wherein the signal points of said auxiliary signal and said pilot signal are arranged on different positions on said I-Q complex plane.