Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2004-11-03
2009-11-10
Lugo, David B (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S299000
Reexamination Certificate
active
07616698
ABSTRACT:
A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may “stomp” on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.
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Choi Won-Joon
Gilbert Jeffrey M.
Sun Qinfang
Tehrani Ardavan Maleki
Atheros Communications Inc.
Bever Hoffman & Harms LLP
Harms Jeanette S.
Lugo David B
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