Title: SIMPLE DESIGN METHOD OF MIMO MULTIUSER DOWNLINK SYSTEM BASED ON BLOCK-DIAGONALIZATION

Issue Number: Vol. 1, No. 1
Year of Publication: May - 2011
Page Numbers: 223-235
Authors: T. taniguchi, Y. Karasawa, N. Natajima
Journal Name: International Journal of New Computer Architectures and their Applications (IJNCAA)
- Hong Kong

Abstract:


Block diagonalization (BD) technique is widely used in multiple input multiple output (MIMO) multiuser downlink systems because of its simplicity and high ability for eliminating the interuser interferences. In this study, very simple weight design algorithms based on BD are proposed, in which the order of steps is swapped, namely, receiver weights are calculated first, and then transmisson weights are derived using zero forcing (ZF) approach. It is shown through computer simulations that the proposed method achieves better performance that the conventional BD under certain conditions. Additionally, the condition on the degrees of freedom is released, hence it can be utilized for the transmitters with small number of antennas to which BD cannot be applied.