Method and apparatus for ordering retransmissions in an NxM...

Details Method and apparatus for ordering retransmissions in an NxM... Method and apparatus for ordering retransmissions in an NxM...

2006-08-11

2011-11-22

Afshar, Kamran (Department: 2617)

Multiplex communications

Communication over free space

Combining or distributing information via time channels

C370S252000, C370S315000, C370S465000, C375S267000, C375S347000, C375S295000, C375S296000

Reexamination Certificate

active

08064428

ABSTRACT:
A method is provided for ordering retransmissions in a Multi-Input Multi-Output (MIMO) system using N×M antennas. A transmitter splits a coded data stream into N sub-packets, and transmits the N sub-packets to a receiver via N transmission antennas. The receiver removes interferences of the N sub-packets received via M reception antennas, and independently decodes the interference-removed sub-packets. The receiver transmits an acknowledgement (ACK) or a negative acknowledgement (NACK) to the transmitter based on errors included in the decoded sub-packets. Upon receipt of the NACK, the transmitter retransmits to the receiver a sub-packet retransmission using ordering based on an Alamouti space-time coding scheme.

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