Performance Analysis of Fiber-Optic Inband Relaying in the Presence of Self-Interference

This paper presents 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 via an optical fiber. We propose 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 due to the interference is discussed in terms of the carrier frequency, radio propagation condition, and optical fiber length. Moreover, we show that the performance of fiber-optic relaying is superior to that of double-hop relaying.