Title :
Retransmission Strategies for Spatially Multiplexed 2Ã\x972 MIMO Systems
Author :
De Carvalho, Elisabeth ; Popovski, Petar
Author_Institution :
Aalborg Univ., Aalborg
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presented for 2x2 MIMO spatial multiplexing systems where adaptive modulation and coding (AMC) is implemented based on outdated CSI at the transmitter.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;
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
DOI :
10.1109/PIMRC.2007.4394810
