基于精密相位制同步广播技术构建大规模多层中波单频覆盖网  

Large-scale Multi-layer MW SFN Based on Precise Phase Synchronous Broadcasting Technology

作　　者：戚武 陈颖 于新 海霞 李锦文 李薰春 Qi Wu;Chen Ying;Yu Xin;Hai Xia;Li Jinwen;Li Xunchun(Academy of Broadcasting Science,SAPPRFT,Beijing 100866,China)

机构地区：[1]国家新闻出版广电总局广播科学研究院,北京100866

出　　处：《广播与电视技术》2018年第8期99-105,共7页Radio & TV Broadcast Engineering

摘　　要：本文提出的精密相位制中波同步广播技术,彻底消除同频干扰,真正实现0d B同频保护率的大规模单频组网,在大幅度提高有效覆盖的同时高效释放频率资源,对增强覆盖网的节目播出能力、降低覆盖网的最低可用场强、改善无线电波次序和电磁环境具有重要意义。内蒙古自治区基于该技术,构建了世界最大规模的多层单频覆盖网,仅使用6个频率完成了53个台站的六套节目覆盖。现场收测表明,网内未发现同频干扰,且具有对抗网外天波同频干扰的能力。A precision phase-synced medium-wave synchronous broadcasting technology proposed in this paper completely eliminates the cochannel interference and truly realizes a large-scale single-frequency networking with the 0dB co-channel protection ratio.It is of great significance to enhance the broadcasting capability of the network,to reduce the minimum available field strength,and to improve the radio wave order and electromagnetic environment.Based on this technology,Inner Mongolia Autonomous Region has built the world's largest multi-layer singlefrequency network.Using only 6 frequencies,53 transmitting stations are synchronized,six sets of programs are broadcasted.The field-test shows that the co-channel interference is not found in the network,and it has the ability to cope with the sky wave co-channel interference outside the network.

关 键 词：精密相位制中波同步广播 大规模多层单频网覆盖 

分 类 号：TN934.1[电子电信—信号与信息处理]