Title :
Effective rate maximization in large MIMO multiuser system
Author :
Ilgyu Choi ; Chungyong Lee
Author_Institution :
Dept. of Electr. & Electron. Eng. Coll. of Eng., Yonsei Univ., Seoul, South Korea
Abstract :
Large MIMO system can achieve high data rate with simple linear transceiver. However, for this advantage, long time is required to estimate channel state information (CSI) at base station (BS). When estimation time is not negligible in coherence time, there exists tradeoff between estimation and data transmission. With long estimation time, data rate increases, but data transmission time decreases. Otherwise, with short estimation time, data rate decreases, but data transmission time increases. Therefore, maximizing not data rate itself but effective rate is required in large MIMO system. We mathematize an effective rate problem in a reasonable large MIMO system, and prove its concavity and find the optimal tradeoff point.
Keywords :
MIMO communication; array signal processing; channel estimation; data communication; optimisation; CSI; base station; channel state information; coherence time; concavity; data rate; data transmission time; effective rate maximization; estimation time; large MIMO system; multiuser system; tradeoff point; Channel estimation; Coherence; Data communication; Estimation; MIMO; Signal to noise ratio; Uplink; effective rate; large MIMO; tradeoff;
Conference_Titel :
Emerging Technologies for a Smarter World (CEWIT), 2012 9th International Conference & Expo on
Conference_Location :
Incheon
Print_ISBN :
978-1-4673-2500-4
DOI :
10.1109/CEWIT.2012.6606978
