This page of LTE architecture covers LTE system architecture covering LTE EUTRAN and LTE Evolved Packet Core(EPC) basics.
It provides link to LTE system overview,LTE air interface,LTE terminology,LTE UE categories,LTE frame structure,LTE physical layer,LTE protocol stack,LTE channels(logical,transport,physical),LTE throughput,LTE carrier aggregation,Voice Over LTE,LTE advanced,LTE vendors and LTE vs LTE advanced.