Retransmission Strategies for Spatially Multiplexed 2Ã\x972 MIMO Systems

Author

De Carvalho, Elisabeth ; Popovski, Petar

Author_Institution

Aalborg Univ., Aalborg

fYear

2007

fDate

3-7 Sept. 2007

Firstpage

1

Lastpage

5

Abstract

Packet retransmission strategies are presented for 2x2 MIMO spatial multiplexing systems where adaptive modulation and coding (AMC) is implemented based on outdated CSI at the transmitter. Antennas for retransmission are selected to maximize the throughput of the system. A sign change or conjugate operation is allowed for retransmitted packets. The proposed schemes perform antenna selection based on the CSI at the receiver and feed back relevant information to the transmitter. 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 communication; modulation coding; multiplexing; MIMO spatial multiplexing system; adaptive coding; adaptive modulation; antenna selection; channel state information; packet retransmission; space time block code structure; Adaptive systems; Antenna feeds; Block codes; Decoding; MIMO; Modulation coding; Receiving antennas; Throughput; Transmitters; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on

Conference_Location

Athens

Print_ISBN

978-1-4244-1144-3

Electronic_ISBN

978-1-4244-1144-3

Type

conf

DOI

10.1109/PIMRC.2007.4394810

Filename

4394810