Showing papers by "Timothy A. Thomas published in 2012"

CSI Feedback with Elevation Beamforming

Abstract: The specification and drawings present a new method, apparatus and software related product for using elevation beamforming with standardized CSI feedback for evolving deployment scenarios (e.g., in LTE and LTE-A wireless systems). According to an embodiment of the invention, a network element such as eNB may send to a UE reference signals (e.g., CSI-RS) on a plurality of resources or PRBs (e.g., frequency subbands), each resource can be transmitted with one of a plurality of downtilt angles/values. In response, the network element may receive from the UE a feedback report comprising selected by the UE one or more of the plurality of resources/frequency subbands and related information on PMI/ CQI/RI for each selected resource/frequency subband. Then, based on the feedback report, the network element can determine/identify at least one preferred downtilt angle to use for future transmissions to the UE.