Title :
Multiple ARQ processes for MIMO systems
Author :
Zheng, Haitao ; Lozano, Aurelie ; Haleem, Mohamed
Author_Institution :
Wireless Res. Lab., Lucent Technol. Bell Labs, Holmdel, NJ, USA
Abstract :
We propose a new Automatic Retransmission reQuest (ARQ) scheme for MIMO systems with multiple transmit and receive antennas. The substreams emitted from various transmit antennas encounter distinct propagation channels and thus have different error statistics. Using per-antenna encoders, separating ARQ processes among the substreams results in a throughput improvement. Moreover, it facilitates the interference cancellation in certain MIMO techniques. Quantitative results from UMTS simulations demonstrate that the proposed multiple ARQ structure yields more than 30% gain in link throughput.
Keywords :
3G mobile communication; MIMO systems; antenna arrays; automatic repeat request; cyclic redundancy check codes; error statistics; interference suppression; radio links; radiofrequency interference; receiving antennas; transmitting antennas; CRC; MIMO systems; UMTS simulations; automatic retransmission request; cyclic redundancy check; error statistics; high-speed downlink packet access; interference cancellation; link throughput; multiple ARQ processes; multiple receive antennas; multiple transmit antennas; per-antenna encoders; propagation channels; substreams; throughput; 3G mobile communication; Antennas and propagation; Automatic repeat request; Cyclic redundancy check; Laboratories; MIMO; Multiaccess communication; Receiving antennas; Throughput; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on
Print_ISBN :
0-7803-7589-0
DOI :
10.1109/PIMRC.2002.1045182
