Title :
Low Complexity Multiuser Scheduling in MIMO Broadcast Channel with Limited Feedback
Author :
She, Feng ; Luo, Hanwen ; Chen, Wen
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiaotong Univ., Shanghai
Abstract :
This paper deals with the design and analysis of low complexity user scheduling algorithm in multi-antenna broadcast (downlink) systems under zero-forcing multiplexing with limited feedback. By using quantization technology, the channel matrix can be divided into several unoverlapped channel regions. Based on the quantized channel regions, we can get semi-orthogonal region sets. Then the transmitter can carry out user scheduling by using the feedback channel direction information (CDI), channel quality information (CQI) and the quantized semi-orthogonal channel region sets. Simulation results show that the presented user scheduling algorithm can achieve a sum rate close to the full searching algorithms while with much lower complexity than those of the previous algorithms.
Keywords :
MIMO communication; antenna arrays; broadcast channels; communication complexity; matrix algebra; multiplexing; multiuser channels; quantisation (signal); scheduling; MIMO broadcast channel; channel matrix; channel quality information; feedback channel direction information; limited feedback; low complexity multiuser scheduling; multiantenna broadcast system; quantization technology; quantized semi orthogonal channel region; searching algorithm; zero-forcing multiplexing; Algorithm design and analysis; Broadcasting; Downlink; Feedback; MIMO; Quantization; Scheduling algorithm; Throughput; Transmitters; Wireless communication;
Conference_Titel :
Circuits and Systems for Communications, 2008. ICCSC 2008. 4th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1707-0
Electronic_ISBN :
978-1-4244-1708-7
DOI :
10.1109/ICCSC.2008.33
