Electromagnetic compatibility assessment of LTE 700 networks for co-channel case

The 694-790 MHz (700 MHz) band was allocated to the mobile, except aeronautical mobile, service on a co-primary basis with other services to which this band is allocated on a primary basis in Region 1 and identified to International Mobile Telecommunications (IMT) by the 2012 World Radiocommunication Conference (WRC-12). The allocation of mobile service in Region 1 in 700 MHz band got effective after the WRC-15. Countries of Region 1 will be able to plan and use these frequencies for IMT systems. The objective of this paper is to assess the electromagnetic compatibility of mobile broadband (LTE) networks operating in 700 MHz band. The research contains an assumption of a preferred frequency division duplex (FDD) channelling arrangement which contains confined 2 × 30 MHz blocks: 703-733 MHz (uplink) and 758-788 MHz (downlink). The model consists of two LTE networks operating in 700 MHz band. Co-channel scenario was analysed in this paper, and possible impact of transmitting LTE base stations to neighbouring LTE network receiving stations. The Monte Carlo simulation within SEAMCAT software was used for interference analysis of these systems. The Monte Carlo simulations show more relaxed electromagnetic compatibility scenario. The set of base station radio parameters were evaluated and different mitigation techniques were proposed in this paper in order to achieve best results for electromagnetic compatibility of LTE 700 networks. For SEAMCAT simulations was used Extended Hata propagation model. The results obtained provide the minimum coupling distance required between two neighbouring LTE 700 networks to maintain the necessary performance level of the LTE system.