基于数字广播信令聚合的高可靠应急传输  

High reliable emergency warning based on digital broadcast signaling aggregation

作　　者：高剑 陈为刚 杨晋生 

机构地区：[1]天津大学微电子学院,天津300072

出　　处：《计算机工程与科学》2018年第1期45-51,共7页Computer Engineering & Science

基　　金：天津市科技兴海项目(KJXH2011-2)

摘　　要：地面数字广播系统主要用于提供音视频通信服务,可以应用于应急情况下的信息发布。但是,在应急场景下,例如战争或自然灾害发生时,发射系统往往会遭到损坏,很难实现可靠信息发布。针对上述问题,以欧洲地面数字广播系统为例,提出了一种基于数字广播信令聚合的高可靠应急传输方法,用于低发射功率下实现短消息数据的高可靠性传输。该方法在某预先设定的固定传输模式下,利用节省的信令部分承载短消息数据,并以GF(16)域上码率为1/2的多进制低密度奇偶校验码编码和重复编码作为信道编码方案,以二进制相移键控作为调制方式。进一步,利用软件无线电平台在开放环境下对所提出的方法进行测试验证。测试结果表明,本方法能够很好地实现应急短消息数据的高可靠传输,该方案可以扩展到其它数字广播系统。Terrestrial digital video broadcasting system is mainly used to provide audio and video communication services,and can be applied to information dissemination in emergency situations.However,in some special circumstances such as war or natural disasters,the established signal transmitting system tends to be damaged and it may be difficult to achieve reliable broadcasting.In view of the above problems,this paper takes DVB-T system as an example and proposes a high reliable emergency warning method based on digital broadcast signaling aggregation,which can achieve high reliable short message transmission under low transmission power.In a pre-set fixed transmission mode,the method utilizes the saved signaling part to carry the short message data,uses the non-binary Low Density Parity Check Codes(LDPC)with the rate of 1/2 in the field of GF(16)and the repeat coding as the channel coding scheme,and uses Binary Phase Shift Keying as the modulation method.Further,the proposed method is tested and verified on the software-defined radio platform in an open environment.The results show that this method can achieve high reliable transmission of emergency short message data,and can be extended to other digital broadcasting system.

关 键 词：地面数字广播 数字广播信令 短消息传输 软件无线电平台 

分 类 号：TN919[电子电信—通信与信息系统]