40～50GHz固定无线接入系统干扰共存分析

Interference Co-existence Analysis of Fixed Wireless Access System

为了分析在40.5~42.3 GHz和48.4~50.2 GHz频段引入固定无线接入系统的可行性，对该频带固定无线接入系统与频率划分表中各主要业务系统间的共存问题进行了研究。通过计算机静态建模方法，分析了此频段内固定无线接入系统对固定、卫星固定、广播、射电天文等业务系统的干扰功率密度随距离变化情况，并根据相关业务的干扰保护准则获得对不同业务的隔离距离，从而证明在一定隔离距离条件下，固定无线接入系统不易对同频段的主要业务造成有害干扰，可以在该频段引入固定无线接入系统。研究成果可支撑我国无线电频谱管理部门对该频段业务的再次划分。

In order to analyze the feasibility of introducing fixed wireless access system in 40 . 5~2 . 3 GHz and 48. 4~50. 2 GHz,the electromagnetic compatibility between the fixed wireless access system and other systems of the principal services is studied according to the Radio Frequency Allocation Table. With com-puter static modeling method,that the interference power density of the fixed wireless access system to the systems of fixed service,fixed-satellite service,broadcasting service and radio astronomy varies with dis-tance is discussed,and the separation distances in different interference scenarios are obtained according to interference protection criteria for related services. The result shows that the fixed wireless access system may not cause harmful interference to existing principal service systems under certain separation distance conditions and these bands can be used for fixed wireless access system beyond the separation distance. The conclusion can be used to support the re-allocation of the bands by the national radio spectrum man-agement department.