摘要
电梯轿厢的金属结构会形成“法拉第笼”效应,导致移动信号严重衰减,而采用室内分布系统等传统覆盖方案则面临成本高、施工难度大等问题。为寻求兼具成本与效益的解决方案,本文对中功率(2W)与微功率(125m W)两种无线数字直放站在电梯场景的应用进行了对比研究。研究结果表明,中功率设备无需额外加装设备即可独立覆盖30层高层电梯;而微功率设备在覆盖超过18层的电梯时,为保证信号质量,需加装轿厢单元进行“接力”放大,导致成本增加。投资对比分析证实,对于高层建筑,中功率方案的单部电梯覆盖成本优势更为明显。综上,无线数字直放站为低业务量的电梯场景提供了一种部署灵活、成本低廉的覆盖方案,但在工程应用中,需关注并优化其引入的噪声干扰问题。
The metal structure of an elevator car creates a“Faraday cage”effect,causing severe attenuation of mobile signals,while traditional coverage solutions like Distributed Antenna Systems(DAS)are hindered by high costs and implementation difficulties.To find a cost-effective solution,this study conducts a comparative analysis of the application of medium-power(2W)and low-power(125mW)wireless digital repeaters for elevator coverage.The results show that the medium-power device can independently cover a 30-story high-rise elevator without additional equipment.In contrast,the low-power device requires a supplementary in-cabin unit for signal relay and amplification to ensure quality of service in elevators exceeding 18 stories,thereby increasing cost.An investment comparison confirms that the medium-power solution offers a more significant cost advantage per elevator,especially in high-rise buildings.In conclusion,wireless digital repeaters provide a flexible and low-cost coverage solution for lowtraffic elevator scenarios,but the issue of noise interference introduced by them must be addressed and optimized in engineering applications.
作者
查昊
朱巧玉
ZHA Hao;ZHU Qiaoyu(China Information Consulting and Designing Institute Co.,Ltd.;China United Network Communications Group Jiangsu Co.,Ltd.)
出处
《江苏通信》
2025年第5期32-36,68,共6页
Jiangsu Communications
关键词
法拉第笼
无线数字直放站
中功率
微功率
Faraday cage
wireless digital repeaters
medium-power
low-power
