DTV 분산중계망의 구축 및 실험방송 결과분석

다국어 초록 (Multilingual Abstract)

To verify the performance of a Distributed Translator Network(DTxR) system in the real world conditions, 5 legacy DTV broadcasting repeater sites were implemented with 5 DTxR systems and field-tested by the DTV field test truck. The 4 DTV broadcasting repeater sites are selected in congested areas where their service areas are overlapped and the 5th site is deviated from the other sites to examine the effect of long-delayed multipath signals. First of all, we checked the receiving signal of the main station that used as a transmitting signal in 5 DTxR systems on the pre-selected 60 test points and tested every case of a DTxR system's on & off except 1 repeater site due to the already built-in DTV repeater system. The test items are received signal electric field strength, noise margin, ease of reception and subjective evaluation of the picture quality for received signals. We used 3rd, 5th, and 6th generation DTV receivers to examine the differences of the receivability by each generation of DTV receivers. Reviewing the test results, we conclude that the DTxR system can be adopted in the current DTV Repeater sites and it could improve the quality and receivability of the main signals by extending the service areas and enhancing the signal levels in the shadow areas without using the extra broadcasting channels.

참고문헌 (Reference)

1 K. Salehian, "Design Procedures and Field Test Results of a Distributed -Translator Network, and a Case Study for an Application of Distributed -Transmission" 52 (52): 2006

2 왕수현, "DTV 분산중계망 필드 테스트 결과" 한국방송공학회 13 (13): 463-478, 2008

3 "ATSC, Transmission Measurement and Compliance for Digital Television, Rev.A"

4 "ATSC, Synchronization Standard for Distributed Transmission, Rev.A, A/110A"

5 "ATSC, Receiver Performance Guidelines, A/74"

6 "ATSC, Guide to the use of the ATSC Digital Television Standard, Rev. A, A/54, Dec."

7 "ATSC, Developing DTV Field Test Plans, A/75"

8 "ATSC, Design of Synchronized Multiple Transmitter Networks, A/111"

9 "ATSC, ATSC Digital Television Standard, Rev.E with Amendments No.1 and 2, A/53E, Dec."