一种DTMB演进系统及其场地测试

Field Test Results of Advanced-DTMB

介绍了一种DTMB演进系统——地面数字电视传输系统(DTMB-A),在简要概述其技术特点后介绍了该系统在云南昆明开展场地测试的情况。给出了相应的测试方案和测试结果,测试主要选择了固定接收和移动接收两种模式,并在视距、建筑物阴影、公路等不同地形地貌下开展了测试。为了掌握DTMB-A的性能,测试中还与DVB-T2的相应模式展开对比。测试结果表明,DTMB-A是一种具有超低接收灵敏度和高传输码率的多媒体系统,其主要性能指标均优于DVB-T2,可以胜任超高清、高清、标清、广播双向互动等传输需求。

An advanced DTMB system （DTMB-A） is introduced in this paper,and key technical feature is introduced and followed with field testing in Kunming,Yunnan Province.Methodology and field test results are introduced in this paper.Two main modes：fix reception and mobile reception are selected during the test.In order to check the performance under different environments,both fixed and mobile receptions are tested during the field trials.Moreover,the fixed reception consists of several types of environments：ground level under line of sight （LOS）,ground level under building shadow,near the road.In order to compare the performance,DVB-T2 system is also tested with similar parameters.Test results validate that,DTMB-A system is a multimedia system with ultra-low receiver sensitivity and high transmission rate.It can qualify ultra HD,HD and SD program transmission requirement,and the main performance of DTMB-A is better than DVB-T2.