REQUIRED GUARDBAND FOR COEXISTING LTE/FDD SYSTEMS OBTAINED BY ACCURATE ANALYSIS OF ADJACENT CHANNEL INTERFERENCE

Abstract

Adjacent channel interference (ACI) can cause serious performance degradation in certain frequency bands when multiple LTE systems are deployed near each other. This paper proposes a more accurate ACI model to calculate the interference power from the adjacent system. A dynamic system level simulator is used to show and analyze the throughput loss as a function of ACI ratio (ACIR) at 2000 MHz. Effective ACIR to guardband mapping functions are derived to determine a more accurate guardband for coexisting LTE systems to satisfy the throughput loss requirement.