Title :
ARQ strategies for 2 Ã\x97 2 spatially multiplexed MIMO systems
Author :
De Carvalho, Elisabeth ; Popovski, Petar
Author_Institution :
Aalborg Univ., Aalborg
fDate :
Oct. 29 2006-Nov. 1 2006
Abstract :
This paper presents packet retransmission strategies for MIMO spatial multiplexing (SM) systems with independent coding and independent ARQ processes per stream. The received signals containing the retransmitted packets are kept in memory and combined. We present two methods to select the retransmission antennas. The first methods is based on CSI: the optimization criterion is the minimization of the SNRs averaged over the outputs of a zero forcing linear equalizer. The second method is blind to CSI. When 2 packets are decoded with errors, retransmission follows a space time block code (STBC) structure, allowing a seamless switching between SM and STBC.
Keywords :
MIMO communication; automatic repeat request; block codes; equalisers; multiplexing; space-time codes; ARQ strategies; MIMO spatial multiplexing systems; channel state information; independent coding; packet retransmission strategies; retransmission antennas; space time block code structure; zero forcing linear equalizer; Automatic repeat request; Block codes; Decoding; Equalizers; MIMO; Packet switching; Samarium; Switches; Transmitters; Transmitting antennas;
Conference_Titel :
Signals, Systems and Computers, 2006. ACSSC '06. Fortieth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
1-4244-0784-2
Electronic_ISBN :
1058-6393
DOI :
10.1109/ACSSC.2006.355043
