DTMB系统的单频网接收性能预测  

Performance Prediction for DTMB System under SFN Environment

作　　者：董鑫 胡曾千[2] 杨昉[3] 

机构地区：[1]长沙广电数字移动传媒有限公司,湖南长沙410005 [2]深圳清华大学研究院,广东深圳5180572 [3]清华大学信息技术研究院,北京100084

出　　处：《电视技术》2012年第13期1-3,共3页Video Engineering

摘　　要：给出了一种基于信道容量分析预测DTMB多载波工作模式和单频网环境中接收信噪比门限的方法,并由实验室测试结果证实了该方法的准确性。根据这一方法,可以快速、准确地估计出单频网覆盖重叠区内的人工多径对接收信号性能的影响。In this paper, a method is proposed ,which is based on the channel capacity analysis to predict the signal-to-noise ratio （SNR） threshold in single frequency networks （SFNs） for the muhi-carrier modes of digital television/terrestrial multimedia broadcasting （DTMB） system. The accuracy of this method is verified via the laboratory measurement results. According to the proposed method, the influence of the artificial muhipath channel on the reception quality in the overlapping coverage area can be rapidly and accurately evaluated.

关 键 词：单频网 DTMB 信道容量 信噪比门限 

分 类 号：TN949.197[电子电信—信号与信息处理]