Imperfect Radio over Fibre Aided Distributed Antennas with Fractional Frequency Reuse

The achievable throughput of the entire cellular area is investigated, when employing fractional frequency reuse techniques in conjunction with realistically modelled imperfect optical fibre aided distributed antenna systems (DAS) operating in a multicell scenario. Given a fixed total transmit power, a substantial improvement of the cell-edge area´s throughput can be achieved without reducing the cell-centre´s throughput. The distributed antennas are connected by realistic lossy optical fibre associated with a pulse-broadening parameter of β ≤ 0.1. Quantitatively, the entire cell-edge throughput is better than η = 3bits/s/Hz, potentially reaching 4bits/s/Hz ≤ η ≤ 5bits/s/Hz in the best illuminated areas. The geographic throughput distribution is characterized with the aid of throughput contours.