US Patent 7646702 OFDM communication apparatus

Patent 7646702 was granted and assigned to Panasonic on January, 2010 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Panasonic

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

76467020

Date of Patent

January 12, 2010

Patent Application Number

101697160

Date Filed

November 14, 2001

Patent Primary Examiner

‌

Gregory B Sefcheck

Patent abstract

An orthogonal frequency division multiplexing (OFDM) transmission apparatus and method generate a transmission sequence including first data, second data, and known signals such that more known signals are allocated to the first data than to the second data within the transmission sequence. The transmission sequence is OFDM multiplexed into a sequence of OFDM signals and transmitted. A receiver of the OFDM signal sequence uses the known signals for estimating transmission paths of the communicated OFDM signals and improving the reception of the data to which they are allocated.