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:
Sep. 11, 2007
Filed:
Aug. 22, 2001
Takahiro Kumura, Tokyo, JP;
Takahiro Kumura, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A complex symbol sequence (), which is a product of an orthogonally detected complex demodulated symbol sequence () and a conjugate complex number of a known symbol sequence (), is applied to phase rotating units () which change the phase of the complex symbol sequence () based on frequency offsets (fa, fb, fc). N-symbol adders () each add N symbol values supplied from the phase rotating units (), while M-power adders () each calculate the power of a value supplied from the N-symbol adders (), and add the power M times. A frequency offset control unit () controls frequency offsets applied to the phase rotating units () based on three power sums supplied from the M-power adders (), and delivers a power offset estimate ().