时延差和功率比双变量对地面数字电视单频网覆盖重叠区的接收效果影响研究  

Study on the Influence of Delay Difference and Power Ratio on the Reception of Single Frequency Network Coverage Overlapping Area of Terrestrial Digital Television

作　　者：韦潜 邹颖丰 陈华生 秦健峰 Wei Qian;Zou Yingfeng;Chen Huasheng;Qin Jianfeng(Guangxi Radio and Television Technology Center,Guangxi 530012,China;Guilin Sub-center of Guangxi Radio and Television Technology Center,Guangxi 541012,China)

机构地区：[1]广西广播电视技术中心,广西530012 [2]广西广播电视技术桂林分中心,广西541012

出　　处：《广播与电视技术》2024年第11期69-73,共5页Radio & TV Broadcast Engineering

摘　　要：要确保地面数字电视单频网覆盖重叠区设备稳定接收信号,需满足抗回波时延要求或达到地面数字电视干扰同频保护率标准。本文以时延差和功率比组合变量作为矩阵测试点进行单频网组网实验,结果显示在理论接收条件区之外存在次优条件区,设备可正常接收信号。该发现为单频网组网优化及发射参数调优提供了更多参考依据。To ensure that the equipment in the overlapping area of the single frequency network can receive signals normally,one of the two conditions of anti-echo delay or terrestrial digital TV interference co-frequency protection rate needs to be met.Aiming at this problem,this paper uses the combination variable of time delay difference and power ratio as the matrix test point,and conducts a single frequency network networking experiment.The experimental results show that outside the theoretical condition area,there are still some sub-optimal condition areas,so that the equipment can receive signals normally.These findings provide more references for SFN network optimization and transmission parameter tuning.

关 键 词：单频网 重叠区 回波时延 同频保护率 

分 类 号：TN949.6[电子电信—信号与信息处理]