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:
Apr. 18, 2000
Filed:
Feb. 04, 1997
Applicant:
Inventors:
Hidekazu Watanabe, Tokyo, JP;
Hamid Amir-Alikhani, Leonberg, DE;
Assignees:
Sony Corporation, Tokyo, JP;
Sony United Kingdom Limited, Weybridge, GB;
Primary Examiner:
Int. Cl.
CPC ...
H04L / ; H04L / ;
U.S. Cl.
CPC ...
375344 ; 375364 ; 370514 ;
Abstract
In a radio apparatus of such as digital cellular which transmit and receive audio signals upon coded, the frequency error can be detected easily and certainly even in the environment of high noise level. The frequency error .theta..sub.e is detected according to the detection result of the complex correlation value between the synchronizing signal and the standard signal.