ISSN : 1796-2021
Volume : 4    Issue : 5    Date : June 2009

Robust Emergency Communications Using TxID Watermark of ATSC DTV System
Xianbin Wang, Md. Jahidur Rahman, Sung Ik Park, Heung Mook Kim, and Yiyan Wu
Page(s): 339-347
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In today’s world, having a reliable communication system during emergency situations is of
paramount importance to lessen the impact of the disasters. This paper proposes an emergency
communication technique which is enabled by ATSC DTV transmitter identification (TxID) watermark
signal. Theoretical and simulation results show that ATSC TxID watermark signal can reach a larger
coverage area than the 8-VSB DTV signal and hence can be used to enable emergency
communication during national disastrous situations. The coverage for this emergency
communication system is predicted using popular Hata-Davidson propagation model and coverage
maps clearly showing the extended and overlapped coverage for DTV stations in Huron and
Stratford area in the province of Ontario, Canada is presented. Comparison with other existing
emergency communication systems is carried out and performance matrices such as alerting
message error rate, required no. of stations, network reliability etc. are evaluated to assess the
robustness of the proposed emergency communication system.

Index Terms
Emergency communication, TxID watermark, coverage analysis, network reliability, interoperability