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학술지 RF Watermark Backward Compatibility Tests for the ATSC Terrestrial DTV Receivers
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박성익, 김정창, 최대원, 김흥묵, 오왕록
IEEE Transactions on Broadcasting, v.57 no.2 PART 1, pp.246-252
10MR2900, 지상파 DTV 전송효율 고도화 기술개발, 김흥묵
In a single frequency network (SFN) for the Advanced Television Systems Committee (ATSC) terrestrial digital television (DTV) system, co-channel interference induced by the multiple transmitters and/or repeaters which use the same output channel is inevitable. Since the presence of interference results in the performance degradation of the SFN, it is crucial to manipulate the interference by adjusting the transmit power and the emission time of each transmitter and repeater within the SFN. In the ATSC terrestrial DTV system, in order to facilitate the interference manipulation process, a transmitter identification (TxID) signal which is embedded in the transmit signal from each transmitter and repeater is recommended. However, such an embedded signal may degrade the DTV signal quality even though the injection level of the TxID signal is very low compared to the DTV signal. Hence, the effect of the TxID signal on the DTV signal needs to be investigated before deploying the SFN with TxID signal. In this paper, the effect of the TxID signal on the performance of legacy DTV receivers is investigated not only with extensive computer simulation but also with laboratory and field tests. According to the various test results, the average performance loss of the conventional DTV receiver due to the TxID signal is less than 0.2 dB when the TxID signal is injected at 30 dB below the DTV signal power. © 2011 IEEE.
ATSC, backward compatibility, DTV, SFN, TxID signal
KSP 제안 키워드
Advanced television systems committee(ATSC), Backward compatibility, Computer simulation(MC and MD), DTV receivers, Emission time, Field Test, Injection level, Performance loss, Signal quality, Transmit power, Transmitter Identification