Assessing and Mitigating the In-Band Emission Interference in D2D-Enabled Cellular Networks

In D2D-enabled cellular networks, the cellular user equipments (CUEs) and D2D user equipments (DUEs) can use the overlay in-band D2D scheme and share the channel to transmit the uplink and D2D signals. As a result, the uplink signal experiences in-band emission interference (IEI) as well as co-channel interference at the serving base station (BS). This paper demonstrates the IEI effect on the data rate of the cellular system. The results show the IEI degrades the data rate of CUEs significantly especially under high DUEs density scenario. Accordingly, we propose a density-based strategy (DBS) to mitigate IEI, and we evaluate the proposed strategy by deriving DUEs reduction percentage as a trade-off metric. The proposed strategy remarkably improves the cellular system performance.