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A Study of RF Watermark Backward Compatibility under Various Channel Environments  

Kim, Jeong-Chang (Electronics and Telecommunications Research Institute)
Park, Sung-Ik (Electronics and Telecommunications Research Institute)
Choi, Dae-Won (Electronics and Telecommunications Research Institute)
Lim, Hyoung-Soo (Electronics and Telecommunications Research Institute)
Kim, Heung-Mook (Electronics and Telecommunications Research Institute)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.47, no.8, 2010 , pp. 99-107 More about this Journal
Abstract
In a single frequency network (SFN) for Advanced Television Systems Committee (ATSC) terrestrial digital television (DTV) system, the interferences induced by the multiple transmitters and/or repeaters using the same frequency are inevitable. Since the presence of interferences results in performance degradation of the SFN, it is crucial to manipulate the interferences by adjusting the transmit power and timing of each transmitter and repeater. In the ATSC terrestrial DTV system, in order to facilitate the interference manipulation process, a transmitter identification (TxID) signal which is uniquely embedded in the signal to be transmitted from each transmitter and repeater is recommended. Even though the injection level of the TxID signal is much lower than the DTV signal, the TxID signal injection infects the DTV signal. Hence, the effect of the TxID signal on the DTV signal must be investigated before deployment. In this paper, the effect of the TxID signal on the performance of legacy DTV receivers under additive white Gaussian noise and multipath channel environments is investigated not only with computer simulation but also with laboratory and field tests. The test results show that the average threshold of visibility degradation of the legacy DTV receivers due to the TxID signal injection is less than 0.2 dB at the TxID injection level of -30 dB.
Keywords
ATSC; backward compatibility; multipath channel; SFN; TxID;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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