Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2005-03-15
2010-11-02
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S347000, C375S299000, C375S130000, C375S295000, C455S132000, C455S504000
Reexamination Certificate
active
07826547
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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Jianhua Liu et al: “A MIMO System with Backward Compatibility for OFDM Based WLANs”; Signal Processing Advances in Wireless Communications, 2003; SPAWC 2003; 4th IEEE Workshop on Rome, Italy Jun. 15-18, 2003; Piscataway, NJ, USA; IEEE, US, Jun. 15, 2003, pp. 130-134, XP010713389; ISBN: 0-7803-7858-X.
Hansen Christopher J.
Moorti R. Tushar
Trachewsky Jason A.
Young Christopher
Broadcom Corporation
Garlick & Harrison & Markison
Lam Kenneth
Liu Shuwang
Smith Jessica W.
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