Patent ID: 8948327
Filing Date: 2015-02-03
Classification: H03G,H04B

Abstract:
1. A multiple-input-multiple-output (MIMO) receiving system comprising: a MIMO baseband module having N branches; and a radio distribution network (RDN) connected to the MIMO baseband module, comprising a plurality of beamformers, each of said beamformers fed by two or more associated antennas, so that a total number of antennas in the system is M, wherein M is greater than N, wherein each one of the beamformers includes a passive combiner configured to combine signals coming from the antennas associated with the beamformer into a combined signal, wherein at least one of said beamformers is further configured to selectively amplify or attenuate in discrete steps, one or more of the signals coming from the M antennas prior to entering the passive combiners, based on one or more qualitative metrics measured by the MIMO baseband module.