TY  - JOUR
T1  - Sumrate Maximization by Optimal Precoder Design for MIMO
Retransmission System
AU - Sankaran, K. Sakthidasan AU - Geo, V. Beslin AU - Umarani, S.M. AU - Archana, P. 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 11
SP  - 3611
EP  - 3614
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.3611.3614
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.3611.3614
KW  - MIMO
KW  -CSI
KW  -precoding
KW  -codebook
KW  -retransmission
KW  -retransmission
AB  - MIMO system offers substantial gain in through put and link reliability in wireless systems.
Precoding in MIMO plays a vital role in mitigating fading and co-channel interference effects in time-variant
channels. Despite of these advantages, the wireless system is more prone to packet errors and loss due to
channel distortions, noise or fading. This in turn invokes the necessity of retransmission in MIMO. A
codebook based precoding approach is used in retransmission systems in which instead of using a single
codebook, a new codebook is designed for each retransmission using Lloyd algorithm which minimizes the
average distortion. This approach combines the effect of precoding and retransmission in MIMO thereby
providing high sum rate and BER.
ER  -