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. 11, 2003
Filed:
Mar. 29, 2000
Applicant:
Inventors:
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J 1/100 ;
U.S. Cl.
CPC ...
H04J 1/100 ;
Abstract
In an OFDM demodulator, in order to stably perform a timing reproducing process with a simple configuration, a complex correlation circuit correlates sampled and quantized digital complex baseband signals outputted from A/D converters and a pattern of a preamble for timing/carrier frequency synchronization of a short symbol prestored in a reference signal storing circuit and outputs the correlation result. The correlation result is supplied to a timing detecting circuit and the timing of the short symbol is detected.