Spectrum-Energy Efficiency Tradeoff of Distributed Antenna Network
نویسندگان
چکیده
It is well known that the spectrum efficiency (SE) and energy efficiency (EE) of wireless network have a tradeoff relationship. In cellular networks, the same frequency is reused among a number of cells and the frequency reuse factor (FRF) considerably affects the SE-EE tradeoff relationship in terms of the co-channel interference (CCI) and network capacity. In distributed antenna network (DAN), antennas are spatially distributed over the entire coverage area and hence, shortdistance communications are allowed, thereby both the EE and SE are improved compared with conventional centralized antenna network (CAN) for the same FRF. In this paper, we derive the tradeoff relationship between SE and EE of DAN taking FRF into account. Numerical results show that FRF=1 maximizes the SE and EE over the entire cell in DAN and that DAN achieves better SE-EE tradeoff relationship than CAN. Keywords—distributed antenna network; spectrum efficiency; energy efficiency; frequency reuse
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