OFDM frame transmission method and apparatus

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United States of America Patent

PATENT NO 9800378
SERIAL NO

14751658

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Abstract

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A first orthogonal frequency division multiplexing (OFDM) frame signal is generated that includes a grid of multiple frequency subcarriers and multiple time periods. An OFDM symbol is transmitted using multiple frequency subcarriers during a time period and includes known reference OFDM symbols assigned to corresponding time-frequency resource elements in the grid, Each resource element is defined by a one of the multiple frequency subcarriers and one of the multiple time periods. A second orthogonal frequency division multiplexing (OFDM) frame signal is generated that includes a grid of multiple frequency subcarriers and multiple time periods and includes known reference OFDM symbols assigned to corresponding time-frequency resource elements in the grid. The time-frequency resource elements in the grid assigned to the known reference OFDM symbols in the first OFDM frame signal are different from the time-frequency resource elements in the grid assigned to the known reference OFDM symbols in the second OFDM frame signal. The first OFDM frame signal is converted to a first radio signal and the second OFDM frame signal to a second radio signal. The first radio signal is transmitted from a first antenna and the second radio signal from a second, different antenna.

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Patent Owner(s)

  • OPTIS WIRELESS TECHNOLOGY, LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsuoka, Akihiko Kanagawa, JP 195 3218
Murakami, Yutaka Osaka, JP 792 6707
Nakagawa, Yoichi Tokyo, JP 96 1415
Orihashi, Masayuki Kanagawa, JP 218 3553

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