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. 21, 2006
Filed:
Mar. 14, 2002
Kazuo Tanada, Tokyo, JP;
Hiroshi Kubo, Tokyo, JP;
Takeshi Uraguchi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A sampling unit that sequentially samples a received signal. A plurality of demodulation processing units set in advance with frequency correction values of mutually different sizes, and that correct frequencies of the sampled signals according to the frequency correction values, demodulate the sampled signals after the frequency correction, and output decision values and reliability information of the received signal, and detect known synchronization words that have been inserted into the received signal from the decision value. A decision value selecting unit selects one final decision value from a plurality of decision values based on a plurality of pieces of reliability information that have been output from the demodulation processing units and a result of the detection of the synchronization word. And, a frequency error detecting unit estimates a frequency error of the received signal based on a frequency correction value of the demodulation processing unit corresponding to the final decision value.