The present document is the technical report on "LTE-Advanced Feasibility Studies in 3GPP RAN WG4". In particular it facilitates within TSG RAN the preparation of the ITU-R submission template with the parameters which are considered as RAN4 responsibility. The ITU-R submission template and its responsibility across the WGs is captured in [3] and discussed in RAN. The ITU-R submission template has been copied in Annex A.1. This document is intended to gather the relevant background information in order to address critical UE and BS RF requirements and draw a conclusion on the feasibility of the identified RF scenarios and parameters.