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[BMSB 2017] Preliminary Field Trial Results for DVB-T2 Indoor Reception in Seoul: A Single Transmitter Case

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Wednesday 6th June 13:30-15:10 TCongress @ Cagliari, Italy
Session 2A: Broadcast System Field Test

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[BMSB 2017] Preliminary Field Trial Results for DVB-T2 Indoor Reception in Seoul: A Single Transmitter Case

  1. 1. KoreanBroadcastingSystem| TechnicalResearchInstitute Preliminary Field Trial Results for DVB-T2 Indoor Reception in Seoul: A Single Transmitter Case IEEE BMSB 2017 Wednesday 6th June 13:30-15:10 TCongress @ Cagliari, Italy Session 2A: Broadcast System Field Test Sungho Jeon1, Junghyun Kim1, Yoo-Sang Shin1, Sanghoon Kim1, Sangjin Hahm1, Young-Woo Suh1, Sung-Ik Park2, Jae-young Lee2, and Jong-Soo Seo3 1Technical Research Institute, Korean Broadcasting System (KBS), Seoul, 07235, Republic of Korea 2Broadcasting Systems Research Department, ETRI, Daejeon, 34129, Republic of Korea 3Department of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
  2. 2. KoreanBroadcastingSystem| TechnicalResearchInstitute Table of Contents 1. Introduction 2. Transmit Configuration 2-1 Site Configuration 2-2 Transmission Modes 3. Receive Configuration 3-1 Measurement Equipment 3-2 Measurement Locations 4. Field Measurement Results 4-1 Horizontal Variation 4-2 Vertical Variation 4-3 Empirical Distributions of Signal Level and MER 4-4 Relationship between Input Level and MER 5. Conclusion 2
  3. 3. KoreanBroadcastingSystem| TechnicalResearchInstitute At 5:00 AM on 31 May 2017, KBS UHDTV Master Control Room Ceremony for World’s First Terrestrial UHDTV Broadcasting in Korea @ KINTEX
  4. 4. KoreanBroadcastingSystem| TechnicalResearchInstitute ATSC 3.0 RF Signal is On-Air over 700 MHz Band KBS1 52 EBS KBS2 5MHz 698 704 710 718 728 753 759 765 771 773 783 803 [MHz] 806 PS (Public Safety)- LTE PS (Public Safety)- LTE Guard band Guardband Guardband Guardband Mobile Broadband Uplink ↑ Mobile Broadband Downlink ↓ 748 2MHz 3MHz8MHz CH51 ATSC DTV 0 C V KBS1 MBC KBS2SBS EBS Namsan 5 kWMokdong 900 W Gwanak 5 kW Gwangyo 2 kW Yongmun 2 kW Seoul Metropolitan area 1st phase UHDTV transmission sites
  5. 5. KoreanBroadcastingSystem| TechnicalResearchInstitute Photo from an LG home appliance store nearby my house Antenna input for UHDTV (ATSC 3.0) Antenna input for DTV (ATSC 1.0)
  6. 6. KoreanBroadcastingSystem| TechnicalResearchInstitute 6 북감악 남산 계양산 관악산 광교 용문산 파평 하점 인천 송학 만월 광명 안산 운중 성남 송정 용인 이동 안성 화도 동두천 포천 가능 천보산 소흘 진접 불광 장위 백련 ATSC 1.0 DTV & DMB High Power Station 6 ATSC 1.0 DTV Only Low Power Station 13 ATSC 1.0 DTV & DMB Low Power Station 9 [Note] ATSC 1.0 DTV & DMB Transmission Site Status Operated by KBS in Seoul Metropolitan Area About 75 km from Kwan-Ak 28 in total
  7. 7. KoreanBroadcastingSystem| TechnicalResearchInstitute Motivation: Why & For What Are We Starting ATSC 3.0 based UHDTV Broadcasting? UHD TV 4K UHD HD Ultra High-Definition TV Improved Service with the Internet HD UHD 3,840 X 2,1601,920 X 1,080 4 times better image quality compared to HD HDR, WCG, HFR techniques for realistic broadcasting Fixed, portable, mobile reception in an SFN Direct reception environment anywhere IP-based interactive & customized service Home portal service with 2nd screen, disaster / safety information notice Fixed Indoor Reception Mobile Outdoor Reception UHD VoD Home Portal (Second screen, Customized service) Advanced Emergency Alerting ① Great benefit to viewers and ② to revitalize the broadcasting industry Viewer-friendly Reception Environment
  8. 8. KoreanBroadcastingSystem| TechnicalResearchInstitute [1] Brief Review on Previous Work 8 2014 IEEE Latin-America Conference on Communications (LATINCOM) the urban core of the city of Bilbao, in the north of Spain. Banderas IEEE Trans. Broadcasting, June 2015 The Sergio Arboleda University
  9. 9. KoreanBroadcastingSystem| TechnicalResearchInstitute [2] Collecting Basic Data on Terrestrial UHD Indoor Reception Performance 9 (a) Full Screen Notification before experiment Public notice on experiments for preventing a viewer’s inconvenience  Measurement period: April 26 ~ May 2, 2016 (5 Days) (b) Bottom Subtitle Scroll Announcement during the experiment
  10. 10. KoreanBroadcastingSystem| TechnicalResearchInstitute [2-1] Site Configuration: Kwan-Ak Site 10 DVB-T2 Transmitter DVB-T2 Professional Receiver RF Power Meter Spectrum Analyzer o (a) Outside Kwan-Ak Transmission Site (b) Inside Kwan-Ak Transmission Site
  11. 11. KoreanBroadcastingSystem| TechnicalResearchInstitute [2-1] Site Configuration for DVB-T2 Field Trials 11 o Table I: Transmitter Configurations of Kwan-Ak Mountain Table II: DVB-T2 System Parameters
  12. 12. KoreanBroadcastingSystem| TechnicalResearchInstitute [2-1] Site Configuration 12 (a) MPEG2-TS Multiplexer Setting (b) DVB-T2 Gateway Setting Bitrate (bps) 5,000,000 Bitrate (Mbps) 5.1
  13. 13. KoreanBroadcastingSystem| TechnicalResearchInstitute [3-1] Measurement Equipment (a) (b) DVB-T2 Demodulator 4K-UHD Software Decoder (a) Reception equipment, consisting of a dongle-type DVB-T2 demodulator with an antenna and a high-end smartphone. (b) Screenshot of the measurement software installed on the smartphone. Omni-directional Mono-pole Antenna
  14. 14. KoreanBroadcastingSystem| TechnicalResearchInstitute (a) Point 1 (b) Point 2 (a) 1-C 8-A 1-A 8-C 1 12 14 25 20 6 Kwan-Ak Transmitter (b) [3-2] Measurement Locations From Kwan-Ak transmitter From Kwan-Ak transmitter 5 kW The KBS Research Building The Yonsei Engineering Building
  15. 15. KoreanBroadcastingSystem| TechnicalResearchInstitute From Kwan-Ak transmitter From Kwan-Ak transmitter 1-A 1-B 1-C 1 2 3 5 6 2-A 2-B 2-C 3-A 3-B 3-C 4-A 4-B 4-C 5-A 5-B 5-C 6-A 6-B 6-C 7-A 7-B 7-C 8-A 8-B 8-C (a) Point 1: KBS Research Building Engineering Building #1 Engineering Building #2 Engineering Building #3 4 7 8 9 10 12 11 13 14 15 161718 19 25 24 22 21 20 23 (b) Point 2: Engineering Building at Yonsei University [3-2] Building Layout Indoor measurement locations inside the buildings mapped onto the floor plans
  16. 16. KoreanBroadcastingSystem| TechnicalResearchInstitute [3-2] Building Layout: Point 1 From Kwan-Ak transmitter A C
  17. 17. KoreanBroadcastingSystem| TechnicalResearchInstitute [3-2] Building Layout: Point 1 (2nd Floor) From Kwan-Ak transmitter 1-A 1-B 1-C 2-A 2-B 2-C 3-A 3-B 3-C 4-A 4-B 4-C 5-A 5-B 5-C 6-A 6-B 6-C 7-A 7-B 7-C 8-A 8-B 8-C
  18. 18. KoreanBroadcastingSystem| TechnicalResearchInstitute [3-2] Building Layout: Point 1 (Rooftop) From Kwan-Ak transmitter 1-A 1-B 1-C 2-A 2-B 2-C 3-A 3-B 3-C 4-A 4-B 4-C 5-A 5-B 5-C 6-A 6-B 6-C 7-A 7-B 7-C 8-A 8-B 8-C
  19. 19. KoreanBroadcastingSystem| TechnicalResearchInstitute From Kwan-Ak transmitter 1 2 3 5 6 Engine Buildi Engineering Building #2 Engineering Building #3 4 7 8 9 1718 19 25 24 22 21 20 23 [3-2] Building Layout: Point 2 6 1 2025 From Kwan-Ak transmitter Engineering Building #2 Engineering Building #3
  20. 20. KoreanBroadcastingSystem| TechnicalResearchInstitute ansmitter 5 6 Engineering Building #1 ering ng #2 ering g #3 7 8 9 10 12 11 13 14 15 161718 19 21 20 3 [3-2] Building Layout: Point 2 12 14 9 13 Engineering Building #1 From Kwan-Ak transmitter
  21. 21. KoreanBroadcastingSystem| TechnicalResearchInstitute From Kwan-Ak transmitter 1 2 3 5 6 Engineering Building #1 Engineering Building #2 Engineering Building #3 4 7 8 9 10 12 11 13 14 15 161718 19 25 24 22 21 20 23 1 12 14 25 22 [3-2] Building Layout: Point 2 (2nd Floor) 6
  22. 22. KoreanBroadcastingSystem| TechnicalResearchInstitute [4-1] Field Measurement Results: Horizontal Variation Horizontal variation for all floors at each indoor location before normalization: Point 1 (KBS Research Building) Point 2 (Yonsei Engineering Building) Level[dBm]MER[dB]
  23. 23. KoreanBroadcastingSystem| TechnicalResearchInstitute [4-1] Field Measurement Results: Horizontal Variation Horizontal variation for all floors at each indoor location after normalization: Point 1 (KBS Research Building) Point 2 (Yonsei Engineering Building) Level[dBm]MER[dB]
  24. 24. KoreanBroadcastingSystem| TechnicalResearchInstitute [Note] Field Measurement Results in Colombia: Horizontal Variation before normalization: after normalization: The normalized PDFs of the measurements in each floor to their respective mean value. : the difference from each floor is not very large. The PDFs of the measurements : the higher the mean value of the field strength [5] F. A. Contreras, E. Pedraza, D. Gomez-Barquero, “DVB-T2 Field Trials Results for Portable Indoor Reception in Colombia,” in 2014 IEEE Latin-America Conference on Communications (LATINCOM), Cartagena deIndias, Nov. 2014.
  25. 25. KoreanBroadcastingSystem| TechnicalResearchInstitute [4-2] Field Measurement Results: Vertical Variation Vertical variation for all floors at each indoor location: reference reference reference reference Point 1 (KBS Research Building) Point 2 (Yonsei Engineering Building) Level[dBm]MER[dB]
  26. 26. KoreanBroadcastingSystem| TechnicalResearchInstitute 26 [4-2] Field Measurement Results: Vertical Variation Table III: Average and Standard Deviations at Indoor Measurement Locations (a) Point 1: KBS Research Building (b) Point 2: Yonsei Engineering Building [EBU Tech 3348 r4 / Frequency & Network Planning Aspects of DVB-T2] In Bands IV/V, where the macro- scale standard deviations are 5.5 dB and 6 dB (§ A1.3.5), respectively, the combined value is 8.1 dB.
  27. 27. KoreanBroadcastingSystem| TechnicalResearchInstitute [Note] Field Measurement Results in Colombia: Vertical Variation The mean and standard deviation obtained for the measurements in the class rooms for all floors. -> It can be seen that the obtained values for the standard deviation are considerably similar to the values measured in this work. [5] F. A. Contreras, E. Pedraza, D. Gmez-Barquero, “DVB-T2 Field Trials Results for Portable Indoor Reception in Colombia,” in 2014 IEEE Latin-America Conference on Communications (LATINCOM), Cartagena deIndias, Nov. 2014.
  28. 28. KoreanBroadcastingSystem| TechnicalResearchInstitute CDF of the indoor measurements (solid-line), Curve-fitted CDF (dotted-line) Point 2 σ = 8.7044 Point 1 σ = 7.6905 (a) Signal Level [dBm] (b) MER [dB] Point 2 σ = 8.1041 Point 1 σ = 5.5979 [4-3] Field Measurement Results: Empirical Distributions of Signal Level and MER
  29. 29. KoreanBroadcastingSystem| TechnicalResearchInstitute -91.5 dBm 3 dB 20 dB -85.5 dBm 5 Mbps @ Point 1 5 Mbps @ Point 2 27 Mbps @ Point 1 27 Mbps @ Point 2 [4-4] Field Measurement Results: Relationship between Input Level and MER ▷ 5Mbps bad reception ▶ 5Mbps good reception ○ 27Mbps bad reception ● 27Mbps good reception . For good reception condition of threshold of visibility (ToV), (Level, MER)=(-85.5, 20.0) above in case of 27 Mbps, (Level, MER)=(-91.5, 3.0) above in case of 5 Mbps are required.
  30. 30. KoreanBroadcastingSystem| TechnicalResearchInstitute 30 [5] Conclusion  In this paper, the indoor measurements were collected from two buildings in Seoul, and link budget factors for planning DTT networks for indoor reception were derived.  Generally, increases in both the average reception level and MER were observed as the floor numbers increased. In addition, it was confirmed that the horizontal variation was similar regardless of the floor number. This indicated that the indoor reception quality was mainly affected by the indoor structure.  For future work, to improve the reliability of the analysis discussed above, another measurement campaign should be conducted to gather additional data, and extended to an SFN environment in which more than two transmitters are deployed.
  31. 31. KoreanBroadcastingSystem| TechnicalResearchInstitute [5-1] Further Study: Indoor Reception Performance in a 2-Transmitter SFN Kwan-Ak Transmitter (a) Point 1 (b) Point 2 Point 3 5 kW Kwan-Ak Transmitter 5 kW Nam-San Transmitter Korean Broadcasting Association (KBA) Building
  32. 32. KoreanBroadcastingSystem| TechnicalResearchInstitute [5-2] Building Layout & Measurement Equipment From Kwan-Ak transmitter From Nan-San transmitter Measurement point (worst reception environment) December 23, 2016 Spectrum Analyzer Omni- directional Antenna
  33. 33. KoreanBroadcastingSystem| TechnicalResearchInstitute -72.6-72.3-72.1 -78.4-79.3 -75 -70.6 -58.1 -63.4 -61.8 -65.4 -59.2 -54.5-53.7-55 -63.2-62.1 -59.1-59 -53.2 -51.6 -90 -80 -70 -60 -50 -40 -30 1층 2층 3층 4층 5층 6층 7층 8층 9층 10층 11층 12층 13층 14층 15층 16층 17층 18층 19층 20층 21층 Level [dBm] Strong Moderate Weak Veryweak [5-3] Field Measurement Results: Vertical Variation Korean Broadcasting Association (KBA) Building 21 2 December 23, 2016

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