DocumentCode
748899
Title
Strategies for ARQ in 2x2 MIMO Systems
Author
de Carvalho, Elisabeth ; Popovski, Petar
Author_Institution
Dept. of Electron. Syst., Aalborg Univ., Aalborg
Volume
12
Issue
6
fYear
2008
fDate
6/1/2008 12:00:00 AM
Firstpage
441
Lastpage
443
Abstract
Packet retransmission strategies are presented for 2x2 MIMO spatial multiplexing systems. Antennas for retransmission are selected to maximize an approximation of the throughput of the system. A sign change or conjugate operation is allowed for retransmitted packets. The proposed scheme performs selection of retransmission antennas based on the CSI at the receiver: only 1 bit of feedback is additionally required, along with the acknowledgement bits. When 2 packets are decoded with errors, retransmission follows a space time block code structure, allowing a seamless switching between spatial multiplexing and space time block coding.
Keywords
MIMO systems; automatic repeat request; block codes; multiplexing; receiving antennas; space-time codes; MIMO spatial multiplexing systems; automatic repeat request; packet retransmission; retransmission antennas; sign change; space time block coding; Automatic repeat request; Block codes; Decoding; Feedback; MIMO; Modulation coding; Packet switching; Samarium; Throughput; Transmitting antennas;
fLanguage
English
Journal_Title
Communications Letters, IEEE
Publisher
ieee
ISSN
1089-7798
Type
jour
DOI
10.1109/LCOMM.2008.080259
Filename
4542776
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