Performance of Fiber-Optic Inband Relaying against Self-Interference in Both Uplink and Downlink

This paper proposes a new type of fiber-optic relaying that extends the coverage of mobile networks. The antenna facing the evolved Node B is geographically separated from the antenna facing the user equipment, and the two antennas are connected by an optical fiber. This paper proposes a design approach for fiber-optic inband relaying in the presence of self-interference, which is the interference between the backhaul and access links. The theoretical desired-to-undesired- signal ratio (DUR) resulting from the interference is discussed for both uplink and downlink on the basis of a practical layout model. Moreover, we show the DUR performance for two types of path loss models.