Method to optimize the power assignment of user streams transmitted from base stations in coordinated base station transmission systems

摘要

A method to optimize the power assignment of user streams transmitted from base stations in coordinated base station transmission systems.;In the method of the invention said CBST systems employ block diagonalization techniques and are deployed in MIMO-OFDM scenarios, and it further comprises using a new waterfilling technique which provides a performance very close to the theoretical ideal but with a reduced computational complexity.

主权项

1. A method to optimize power assignment of user streams transmitted from base stations in coordinated base station transmission systems (CBST), the CBST systems employing block diagonalization techniques and being deployed in Multiple Input-Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) scenarios, wherein the optimization is subject to a plurality of constraints on maximum available power transmission from each of the base stations, the method comprising:
solving the optimization of the power assignment with a single constraint, using a processor, considering an equivalent base station among the base stations, wherein the single constraint is a most limiting constraint of the plurality of constraints, and wherein the single constraint is based on a function comprising precoding weights whose sum of squared values is maximum among all the base stations of each symbol transmitted to each user.