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:
Jun. 04, 2013
Filed:
Feb. 06, 2008
Masayuki Kimata, Tokyo, JP;
Masayuki Kimata, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
The present invention provides a channel estimation apparatus in which channel estimation may be made higher than heretofore in accuracy and may be used for calculating the weight for an equalization filter to achieve an optimum equalizing performance. A subcarrier copying unitcopies K items of end-side subcarriers, using the channel estimation obtained by a correlation processing unitand K which is a subcarrier copy number. An IDFT unittransforms the channel estimation obtained at the subcarrier copying unitinto the time domain channel response. A noise path removing unitremoves noise paths from the channel response output from the IDFT unit. A DFT unitperforms DFT of the channel response, from which the noise paths are removed by the noise path removing unit, to output a noise-suppressed frequency domain channel estimation value. A weight calculation unitinputs the frequency domain channel estimation value output from the DFT unitto calculate an equalizing weight.