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:
May. 14, 2013
Filed:
Dec. 13, 2011
Yutaka Murakami, Kanagawa, JP;
Shinichiro Takabayashi, Kanagawa, JP;
Masayuki Orihashi, Chiba, JP;
Akihiko Matsuoka, Kanagawa, JP;
Yutaka Murakami, Kanagawa, JP;
Shinichiro Takabayashi, Kanagawa, JP;
Masayuki Orihashi, Chiba, JP;
Akihiko Matsuoka, Kanagawa, JP;
Harris Corporation, Melbourne, FL (US);
Abstract
In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established.