Title :
Orthogonalization aided distributed scheduling for MU-MIMO BC with adaptive feedback
Author :
Li Zhao ; Jiawei, Yang
Author_Institution :
State Key Lab. of Integrated Service Networks, Xidian Univ., Xi´´an, China
Abstract :
In this paper, we introduce an orthogonalization aided distributed scheduling algorithm for multiuser MIMO broadcast channels (MU-MIMO BC). In this algorithm each mobile station (MS) selects transmission scheme, including beamforming (BF) and spatial multiplexing (SM) according to its channel state and feeds back channel state information (CSI) adaptively. On receiving CSI from each MS, the base station (BS) activates user subset and an orthogonalization based precoding scheme is applied to eliminate co-channel interference (CCI). The proposed user scheduling algorithm is carried out by MSs and BS corporately. The system feedback load depends on each MS´s channel quality. Compared with existing methods, the proposed scheme can achieve high system capacity as well as better BER performance.
Keywords :
MIMO communication; broadcast channels; cochannel interference; error statistics; multiuser channels; scheduling; BER; MU-MIMO BC; adaptive feedback; base station; beamforming; bit error rate; channel state information; co-channel interference; mobile station; multiuser MIMO broadcast channels; orthogonalization aided distributed scheduling algorithm; orthogonalization based precoding scheme; spatial multiplexing; Array signal processing; Base stations; Broadcasting; Channel state information; Feedback; Feeds; Interchannel interference; MIMO; Samarium; Scheduling algorithm; Broadcast channel; Feedback; Multiuser MIMO; Orthogonalization; Precoding; Scheduling;
Conference_Titel :
Wireless Communications & Signal Processing, 2009. WCSP 2009. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4856-2
Electronic_ISBN :
978-1-4244-5668-0
DOI :
10.1109/WCSP.2009.5371469
