Indoor experiment of multi-user MIMO user selection algorithm based on chordal distance

A transmission experiment of a multi-user MIMO system with user selection and linear spatial precoding is conducted and the results are reported. As a low-complexity user selection algorithm, the chordal distance-based user selection (CDUS) algorithm is employed. The testbed used in the experiment is implemented by taking full advantage of the software-defined radio. An amplify-and-forward-based simple channel estimation method is adopted. As a result of the experiment in a conference room, the CDUS algorithm improved both the power efficiency and the interference suppression accuracy compared to the round-robin user selection.

[1]  Daisuke Umehara,et al.  Field Experiments of Linearly Precoded Multi-User MIMO System at 5GHz Band , 2012, 2012 IEEE Vehicular Technology Conference (VTC Fall).

[2]  Andrea J. Goldsmith,et al.  On the optimality of multiantenna broadcast scheduling using zero-forcing beamforming , 2006, IEEE Journal on Selected Areas in Communications.

[3]  B.L. Evans,et al.  Low complexity user selection algorithms for multiuser MIMO systems with block diagonalization , 2005, IEEE Transactions on Signal Processing.

[4]  Max H. M. Costa,et al.  Writing on dirty paper , 1983, IEEE Trans. Inf. Theory.

[5]  R. Taylor,et al.  Echo-MIMO: a Two-Way Channel Training Method for Matched Cooperative Beamforming , 2005, ASILOMAR 2005.

[6]  K. Fukawa,et al.  Interference cancelling equalizer (ICE) for mobile radio communication , 1997 .

[7]  Jungwoo Lee,et al.  Multiuser MIMO User Selection Based on Chordal Distance , 2012, IEEE Transactions on Communications.

[8]  Ying Li,et al.  Chordal Distance-Based User Selection Algorithm for the Multiuser MIMO Downlink with Perfect or Partial CSIT , 2011, 2011 IEEE International Conference on Advanced Information Networking and Applications.

[9]  Hidekazu Murata,et al.  Trellis-coded cochannel interference canceller for microcellular radio , 1997, IEEE Trans. Commun..

[10]  Hidekazu Murata,et al.  Performance of Two-Way Channel Estimation Technique for Multi-User Distributed Antenna Systems with Spatial Precoding , 2009, 2009 IEEE 70th Vehicular Technology Conference Fall.