US Patent 7486749 Determination of a code phase

Patent 7486749 was granted and assigned to Nokia on February, 2009 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Nokia

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

74867490

Patent Inventor Names

Harri Valio0

Samuli Pietilä0

Date of Patent

February 3, 2009

Patent Application Number

110213530

Date Filed

December 22, 2004

Patent Primary Examiner

‌

Young T. Tse

Patent abstract

The invention relates to determining a correct code phase of a received, code modulated carrier signal using a correlation portion, a frequency compensation portion, a coherent memory and a non-coherent memory. In order to compensate for a code Doppler effect and/or a carrier Doppler drift effect, a mapping portion maps correlation values either to the coherent memory or to the non-coherent memory. Alternatively, the mapping portion maps correlation values stored in the coherent memory or in the non-coherent memory to new positions. The mapping depends on a frequency compensation applied by the frequency compensation portion and elapsed integration time, and/or on a drift of a frequency offset in correlation values output by the correlation portion.