Title :
A multi-dimensional radio resource scheduling scheme for MIMO-OFDM systems with channel dependent parallel weighted fair queueing (CDPWFQ)
Author :
Li, Lei ; Niu, Zhisheng
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
We develop a channel dependent parallel weighted fair queueing (CDPWFQ) scheduling algorithm to maximize the system throughput while guarantee minimum data rate requirements for multimedia users in multiuser MIMO-OFDM systems downlink transmission with limited channel state information feedback. We apply the mathematical equivalence between antennas and subcarriers in the analysis, getting multiple parallel transmit subchannels, and then evaluate the channel state from the viewpoint of receivers. Joint space-frequency diversity as well as multiuser diversity is exploited simultaneously by the subchannel allocation algorithm. A fast algorithm for more practical implementation is also proposed. By numerical examples, system throughput and fairness superiority of the CDPWFQ scheme are verified.
Keywords :
MIMO systems; OFDM modulation; antenna arrays; channel allocation; diversity reception; feedback; multimedia communication; queueing theory; scheduling; telecommunication network management; MIMO-OFDM system; channel dependent parallel weighted fair queueing; channel state information feedback; joint space-frequency diversity; multidimensional radio resource scheduling scheme; multimedia user; multiple-input multiple-output; multiuser diversity; orthogonal frequency division multiplexing; parallel transmit subchannels; subchannel allocation algorithm; Channel state information; Downlink; Fading; MIMO; Multimedia systems; OFDM; Resource management; Scheduling algorithm; State feedback; Throughput;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on
Print_ISBN :
0-7803-8523-3
DOI :
10.1109/PIMRC.2004.1368743
