TY - GEN
T1 - Hybrid ARQ for modulo loss reduction in multi-user MIMO THP systems
AU - Takebuchi, Shoya
AU - Tomeba, Hiromichi
AU - Onodera, Takashi
AU - Kubota, Minoru
AU - Maehara, Fumiaki
AU - Takahata, Fumio
PY - 2013/12/1
Y1 - 2013/12/1
N2 - Multi-user MIMO (MU-MIMO) using Tomlinson-Harashima precoding (THP) has great potential to achieve high system capacity in wireless systems. On the other hand, hybrid ARQ (HARQ) is essential to realize the reliable wireless packet transmission and therefore, the combination of THP with HARQ can be seen as a promising approach to achieve reliable high-capacity wireless transmissions. However, this combination has a problem of severe performance degradation due to the accumulation of modulo loss which is the inherent drawback of THP. In this paper, we propose the HARQ scheme to cancel the accumulation of modulo loss in Multi-user MIMO THP systems. The main feature of the proposed approach is to add the same perturbation vector as the initial transmit packet to the retransmit packets in order to prevent the accumulation of modulo loss. The effectiveness of the proposed scheme is demonstrated in comparison with the conventional packet combining scheme by means of computer simulations.
AB - Multi-user MIMO (MU-MIMO) using Tomlinson-Harashima precoding (THP) has great potential to achieve high system capacity in wireless systems. On the other hand, hybrid ARQ (HARQ) is essential to realize the reliable wireless packet transmission and therefore, the combination of THP with HARQ can be seen as a promising approach to achieve reliable high-capacity wireless transmissions. However, this combination has a problem of severe performance degradation due to the accumulation of modulo loss which is the inherent drawback of THP. In this paper, we propose the HARQ scheme to cancel the accumulation of modulo loss in Multi-user MIMO THP systems. The main feature of the proposed approach is to add the same perturbation vector as the initial transmit packet to the retransmit packets in order to prevent the accumulation of modulo loss. The effectiveness of the proposed scheme is demonstrated in comparison with the conventional packet combining scheme by means of computer simulations.
UR - http://www.scopus.com/inward/record.url?scp=84894157893&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84894157893&partnerID=8YFLogxK
U2 - 10.1109/ISPACS.2013.6704579
DO - 10.1109/ISPACS.2013.6704579
M3 - Conference contribution
AN - SCOPUS:84894157893
SN - 9781467363617
T3 - ISPACS 2013 - 2013 International Symposium on Intelligent Signal Processing and Communication Systems
SP - 375
EP - 380
BT - ISPACS 2013 - 2013 International Symposium on Intelligent Signal Processing and Communication Systems
T2 - 2013 21st International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2013
Y2 - 12 November 2013 through 15 November 2013
ER -