Mixed mode preamble for MIMO wireless communications

Pulse or digital communications – Transmitters – Plural diversity

Reexamination Certificate

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Details

C375S267000, C375S295000, C375S130000, C375S347000, C370S328000, C370S344000, C370S338000

Reexamination Certificate

active

08031806

ABSTRACT:
A preamble of a frame for a multiple input multiple output (MIMO) wireless communication for a first transmit antenna of the MIMO communication includes a legacy preamble portion in accordance with a legacy wireless communication protocol. The preamble of the frame for the MIMO wireless communication for the first transmit antenna also includes a current protocol preamble portion in accordance with a protocol of the MIMO wireless communication. The preamble of a frame for at least a second antenna of the MIMO communication includes a cyclically shifted legacy preamble portion for the frame. The preamble of the frame for the MIMO wireless communication for the second transmit antenna also includes a second current protocol preamble portion in accordance with a protocol of the MIMO wireless communication.

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