Distributed Power Control for Cellular MIMO Systems with Temporal and Spatial Filtering
John Papandriopoulos, Jamie Evans, Subhrakanti Dey · Australian Communications Theory Workshop · 2004
This paper concerns the uplink in a cellular MIMO system employing CDMA. Specifically, the problem of joint power control and interference suppression is considered, where filtering is jointly done in both temporal and spatial domains. Iterative algorithms are developed that converge to the globally optimum solution; we then shown how they may be implemented in a distributed context utilizing only local measurements at each base station. Numerous linear filter structures are analyzed, each differing in the computation complexity of implementation. Soft dropping power control in the MIMO context is also investigated with the aim of increasing the number of users admitted to the wireless network and also the likelihood of having a feasible problem.