Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

180607 Field Trial Results for ATSC 3.0 TxID Transmission and Detection in Single Frequency Network of Seoul

325 views

Published on

IEEE BMSB 2018
Wednesday 6th June 13:30-15:10
University sdfasdf @ Valencia, Spain
Session 6A: ATSC 3.0 (1)

Published in: Technology
  • Be the first to comment

  • Be the first to like this

180607 Field Trial Results for ATSC 3.0 TxID Transmission and Detection in Single Frequency Network of Seoul

  1. 1. KoreanBroadcastingSystem| TechnicalResearchInstitute Field Trial Results for ATSC 3.0 TxID Transmission and Detection in Single Frequency Network of Seoul IEEE BMSB 2018 Wednesday 6th June 13:30-15:10 University sdfasdf @ Valencia, Spain Session 6A: ATSC 3.0 (1) Sungho Jeon1, Jaekwon Lee1, Sunhyoung Kwon2, Bo-Mi Lim2, Yoo-Sang Shin1, Sungjun Ahn, Sung-Ik Park2, Jae-Young Lee2 1Technical Research Institute, Korean Broadcasting System (KBS), Seoul, 07235, Republic of Korea 2Broadcasting Systems Research Department, ETRI, Daejeon, 34129, Republic of Korea
  2. 2. KoreanBroadcastingSystem| TechnicalResearchInstitute 2 2017 May 31 Dec. 28 Seoul Daegu Gangneung Ulsan Busan (a) Phase 1 / May 2017 (b) Phase 2 / December 2017 Wonju Daejeon Where and When Starts ATSC 3.0 Based Terrestrial UHDTV Broadcasting? Gwangju Seoul Roll-out Plan
  3. 3. KoreanBroadcastingSystem| TechnicalResearchInstitute 3 (c) Phase 3 / 2020~2021 Deploying Low-Power Relay Stations to Achieve 95 % Service Coverage Frequency Re-Allocation based on ATSC 1.0 and ATSC 3.0 Co-Channel Interference Adjacent Channel Interference Protection Ratio Where and When Starts ATSC 3.0 Based Terrestrial UHDTV Broadcasting? 2018 20202019 2021 20272024 700 MHz UHDTV band 470 – 698 MHz DTV band ATSC 1.0 DTV Switch-Off
  4. 4. KoreanBroadcastingSystem| TechnicalResearchInstitute 4 Seoul Metropolitan area 900 W 900 W 2 kW 5kW 2 kW 2 kW Incheon 5 kW [Source] ITU-R Report BT.2343-2, Collection of field trials of UHDTV over DTT networks [Note] As of June 2018, Transmitters in Seoul Metropolitan Area Gwang Myeong
  5. 5. KoreanBroadcastingSystem| TechnicalResearchInstitute SFN Service Coverage Optimization (1) Network Coverage Simulation Nam-San 5kW Kwan-Ak 5kW Gwang-Gyo 2kW Gwang-Myeong 900W Nam-San 5kW Kwan-Ak 5kW Gwang-Gyo 2kW Gwang-Myeong 900W (a) Number of serving transmitter at the overlapping area (b) Achievable C/N after deploying Gwang-Myeong experimental station
  6. 6. KoreanBroadcastingSystem| TechnicalResearchInstitute SFN Service Coverage Optimization (2) Field Measurement (a) Measurement location on the map (b) Measurement vehicle with 9-meter mast (c) Channel impulse response measured by professional receiver Gwanak Yongmun Gwangyo Region overlapped by signals from three transmitters Omni-directional antenna without TxID detection
  7. 7. KoreanBroadcastingSystem| TechnicalResearchInstitute Before SFN delay offset adjustment After SFN delay offset adjustment Bad reception area due to self-interference [source] ITU-R SG6 Document 6A/394 Rapporteur Group on Single Frequency Networks (SFN) design and implementation Guard Interval [Case study: Rai (Public broadcaster in Italy)] Guard Interval (a) Reducing SFN delay offset of the transmitter (b) Increasing SFN delay offset of the transmitter Resolved SFN Service Coverage Optimization (3) SFN Delay Offset Adjustment
  8. 8. KoreanBroadcastingSystem| TechnicalResearchInstitute [1] Introduction: ATSC 1.0 MFN, ATSC 3.0 SFN 8 ATSC 1.0 (DTV) ATSC 3.0 (UHDTV) Multiple Frequency Network Single Frequency Network Nam-San 521 MHz Gwang-Gyo 641 MHz Gwan-Ak 479 MHz 701 MHz Nam-San Gwan-Ak Gwang-Gyo
  9. 9. KoreanBroadcastingSystem| TechnicalResearchInstitute [1] Introduction: Previous Works on ATSC 3.0 TxID Technique 9 Ensemble average = 1 Ensemble average = 10 RL20 Channel Ensemble average = 30
  10. 10. KoreanBroadcastingSystem| TechnicalResearchInstitute [1] Introduction: Previous Works on ATSC 3.0 TxID Technique 10 Two papers in this session just discussed the TxID detection performance and the impact of TxID into the ATSC 3.0 preamble host signal, through computer simulation and laboratory test. In this paper, we provide the first ATSC 3.0 TxID based field test results in the SFN environment of the Seoul metropolitan area, particularly where four transmitters are overlapping.
  11. 11. KoreanBroadcastingSystem| TechnicalResearchInstitute [2] SFN Environment of Seoul: Site Configuration including Gwang-Myeong Relay Station Supporting TxID Kwan-Ak Nam-San Kwan-Ak Gwang-Gyo Nam-San Gwang-Myeong (a) Transmitters for SFN (red square) and 16 TxID detection points (green circle) in the metropolitan area of Seoul (b) Photo of transmission station seen from the air
  12. 12. KoreanBroadcastingSystem| TechnicalResearchInstitute 900 W Transmitter for KBS 1 Channel 900 W Transmitter for KBS 2 Channel 2:1 Combiner KBS1 KBS2 EBS ATSC 1.0 ATSC 3.0 KBS1UHD + KBS2UHD (b) Inside view: two 900 W transmitters and 2-in-1 RF combiner with a U-LINK system (a) Outside view: KBS 1 channel and KBS 2 channel transmit antenna are installed in 2 stack 4 sided configuration
  13. 13. KoreanBroadcastingSystem| TechnicalResearchInstitute [2] SFN Environment of Seoul: Site Configuration including Gwang-Myeong Relay Station Supporting TxID 13 Gwang-Myeong Gwan-Ak Nam-San Gwang-Gyo Center frequency (UHF channel) 701 MHz (CH52) & 768 MHz (CH56) Transmission power [kW] 0.9 kW 5.0 kW 5.0 kW 2.0 kW Height of transmitting antenna above sea level 180m (15 m above ground) 665 m (50 m above ground) 240 m (100 m above ground) 624 m (86 m above ground) Antenna configuration 2:2:2:2 4:4:4:4 2:2:2:2 2:2:2:2 Antenna gain 4.77 dBi 10.81 dBi 7.79 dBi 7.79 dBi TxID Support Yes No TxID Injection Level (Seed) -9 dB (CH52: 4939, CH56: 4937) - * As of December 2017
  14. 14. KoreanBroadcastingSystem| TechnicalResearchInstitute [2] SFN Environment of Seoul: Field Test Measurement Vehicle with Professional Receiver 14 (a) Omni-directional Antenna 3 m Above Ground 9 m Above Ground (a) Outside view: Omni-directional antenna is located at a height 3 m above ground outside the measurement vehicle
  15. 15. KoreanBroadcastingSystem| TechnicalResearchInstitute [2] SFN Environment of Seoul: Field Test Measurement Vehicle with TxID Receiver 15 (b) ATSC 3.0 IMAS ATSC 3.0 Professional Receiver (b) Inside view : Operating the ATSC 3.0 professional receiver with TxID detection function
  16. 16. KoreanBroadcastingSystem| TechnicalResearchInstitute ATSC 1.0 15.5 dB @ ToV PLP0/Subframe0 PLP1/Subframe1 UHDTV 2.4 Mbps 17.0 Mbps High Quality UHD-MOBILE Available UHD AvailableBootstrap Preamble Time Frequency Frame Subframe 0 Subframe n-1. . . Subframe 0 PLP#0 Subframe 1 PLP#1 Robust Reception 5.5 dB @ ToV [2] SFN Environment of Seoul: Configuration of Preamble Parameter 16k-FFT 32k-FFT
  17. 17. KoreanBroadcastingSystem| TechnicalResearchInstitute 17 [2] SFN Environment of Seoul: Configuration of Preamble Parameter ...Bootstrap TxID signal 8191 preamble symbol #0 preamble symbol #1 TxID signal GI GI A/322 Figure N.2.2 TxID signal injection into the first Preamble symbol period (16K FFT) Bit Interleaved and Coded Modulation (BICM) Framing and Interleaving OVERTHEAIRINTERFACE Waveform Generation Input Formatting TxID Signal Generation A/322 Figure N.1.1 TxID generation and injection into ATSC3.0 host signals. repeated twice
  18. 18. KoreanBroadcastingSystem| TechnicalResearchInstitute 18 [3] Field Test Results: Characteristics of TxID Measurement Points Measurement point GPS Longitude GPS Latitude 1 126.7633583 37.5580222 2 126.7158222 37.6159139 3 126.9174888 37.4939361 4 126.6924111 37.4756417 5 126.7671277 37.5024722 6 126.8015777 37.4875889 7 126.8396777 37.5097750 8 126.8881944 37.5666528 9 126.8515055 37.4117417 10 126.8818249 37.4269361 11 126.8968916 37.4423417 12 126.8640083 37.4784333 13 126.8937908 37.565794 14 126.9256638 37.613232 15 126.9426368 37.538700 16 126.9161530 37.523367
  19. 19. KoreanBroadcastingSystem| TechnicalResearchInstitute Relative Delay from a measurement point to each transmitter with respect to the first arriving signal [us] Distance from a measurement point to each transmitter [km] Measurement point Gwang- Myeong Gwan-Ak Nam-San Gwang-Gyo Gwang-Myeong Gwan-Ak Nam-San Gwang-Gyo 1 0.0000 30.1081 22.5490 66.6776 12.9988 22.0250 19.7588 32.9882 2 0.0000 29.0620 14.5306 66.3955 20.6269 29.3395 24.9830 40.5318 3 0.0000 5.3399 10.7340 44.2170 5.6444 7.2453 8.8624 18.9004 4 0.0000 31.4619 41.5673 59.8302 14.8757 24.3078 27.3373 32.8124 5 0.0000 32.3728 37.2082 65.6477 9.0074 18.7125 20.1621 28.6881 6 0.0000 32.3992 40.9491 65.7013 5.5701 15.2831 17.8463 25.2668 7 0.0000 28.8984 30.1805 65.6778 4.7651 13.4286 13.8130 24.4548 8 6.9076 22.2039 0.0000 61.1317 10.9767 15.5624 8.9058 27.2327 9 0.0000 12.9341 43.4749 35.0598 6.5689 10.4464 19.6023 17.0796 10 0.0000 7.5158 38.3394 34.6792 5.1705 7.4237 16.6644 15.5670 11 0.0000 4.9809 33.5195 37.1243 4.4523 5.9455 14.5012 15.5819 12 0.0000 29.5641 42.0899 65.0862 0.9412 9.8043 13.5594 20.4535 13 8.672784 22.90086 0 61.78955 11.00347 15.26894 8.403434 26.92748 14 27.03875 35.83637 0 73.51762 16.88434 19.5218 8.778325 30.81835 15 21.01146 23.08281 0 61.03009 10.47943 11.10041 4.180357 22.47672 16 2.176698 10.5339 0 49.4513 7.652531 10.15796 6.999974 21.8251 [3] Field Test Results: Characteristics of TxID Measurement Points
  20. 20. KoreanBroadcastingSystem| TechnicalResearchInstitute 20 [3] Field Test Results: Case Study of the TxID-Detected Measurement Points (a) Point #12 (b) Point #8 Channel impulse response TxID
  21. 21. KoreanBroadcastingSystem| TechnicalResearchInstitute 21 [3] Field Test Results: Case Study of the TxID-Detected Measurement Points (c) Point #5 (d) Point #1
  22. 22. KoreanBroadcastingSystem| TechnicalResearchInstitute 22 [4] Issues for Improving the TxID Detection Performance: Effective Injection Level Tx#A Tx#B Tx#C UHDTV TxID with -9 dB injection level -2 dB (0.6310) -1 dB (0.7943) 0 dB (1.0) Injection level -9 dB i.e., -11dB 0.1259 0.0794 -1.2 μs 0.0 μs 1.3 μs
  23. 23. KoreanBroadcastingSystem| TechnicalResearchInstitute 23 -2 dB (0.6310) -1 dB (0.7943) 0 dB (1.0) Injection level -9 dB i.e., -11dB 0.1259 0.0794 -1.2 μs 0.0 μs 1.3 μs 0 dB -1 dB -2 dB TxID -9dB -11dB Effective Injection Level -14.8494 dB [4] Issues for Improving the TxID Detection Performance: Effective Injection Level
  24. 24. KoreanBroadcastingSystem| TechnicalResearchInstitute 24 [4] Issues for Improving the TxID Detection Performance: Time-Variant Reception During Detection Period Time-Invariant case -2 dB (0.6310) 0 dB (1.0) -1.2 μs0.0 μs time 1 -2 dB (0.6310) 0 dB (1.0) -1.2 μs0.0 μs time 2 -2 dB (0.6310) 0 dB (1.0) -1.2 μs0.0 μs Improving TxID detection accuracy by averaging Noise reduction by averaging
  25. 25. KoreanBroadcastingSystem| TechnicalResearchInstitute 25 [4] Issues for Improving the TxID Detection Performance: Time-Variant Reception During Detection Period Time-Variant case -2 dB (0.6310) 0 dB (1.0) 1.2 μs0.0 μs time 1 -2 dB (0.6310) 0 dB (1.0) 4.2 μs0.0 μs time 2 -5 dB (0.3162) 0 dB (1.0) 1.2 μs0.0 μs Noise reduction by averaging -5 dB (0.3162) 4.2 μs False result after taking the averaging Ghost peak observed as if the signals from the 3 transmitters
  26. 26. KoreanBroadcastingSystem| TechnicalResearchInstitute [5] Conclusion ● The first field test using TxID signal in SFN environment was carried out, and it was detected and analyzed at 16 measurement points. ● Our result gives the basic data necessary for optimizing a terrestrial broadcasting network. It was confirmed for the first time that standard TxID signals can be accordingly transmitted and detected, even in the SFN environment. ● However, since only one transmitter was equipped with TxID function, the detection performance for multiple overlapped TxID signals could not be studied. ● In addition, we used only one injection level of - 9 dB. Therefore, future field tests are required to study the performance according to various injection levels, defined in the standard. 26
  27. 27. KoreanBroadcastingSystem| TechnicalResearchInstitute [Note] TTA WG8027 (RF V&V Working Group of Korea)

×