Indoor Network MIMO Performance with Regularized Zero-Forcing Transmission

Network MIMO uses the coherent coordination of -> the transmitted signals from a cluster of bases to greatly reduce -> other-cell interference and improve spectral efficiency. Zero- -> forcing transmission is a simple and readily implemented form of -> Network MIMO that can give good performance gains over -> conventional systems. In this paper, we consider regularized ZF -> as a simple modification and explore the potential benefits for an -> indoor wireless system comprising 8 access points. The ZF -> solution is scaled to obey either sum-power or per-antenna power -> constraints. In the context of this simplified evaluation we find -> that regularization gives no gain in indoor systems, but the results -> hint that gain may be achieved in outdoor systems.