1、 Recommendation ITU-R BT.2036-1 (07/2016) Characteristics of a reference receiving system for frequency planning of digital terrestrial television systems BT Series Broadcasting service (television) ii Rec. ITU-R BT.2036-1 Foreword The role of the Radiocommunication Sector is to ensure the rational,
2、 equitable, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommuni
3、cation Sector are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Reso
4、lution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information
5、database can also be found. Series of ITU-R Recommendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fix
6、ed service M Mobile, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems
7、 SM Spectrum management SNG Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2016 ITU 2016 All rights
8、 reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R BT.2036-1 1 RECOMMENDATION ITU-R BT.2036-1 Characteristics of a reference receiving system for frequency planning of digital terrestrial television systems (Questions ITU-
9、R 114/6 and ITU-R 132-2/6) (2013-2016) Scope This Recommendation defines characteristics of reference receiving systems for various digital terrestrial television systems employed as a basis for frequency planning digital terrestrial television services in the VHF/UHF bands. The ITU Radiocommunicati
10、on Assembly, considering a) that digital terrestrial television services using a variety of systems are now in widespread use; b) that the ITU-R has responsibility for international frequency planning and inter-service sharing to ensure equitable and efficient use of the radio spectrum; c) that the
11、error-correction, data framing, modulation and emission methods for first- and second-generation digital terrestrial television broadcasting (DTTB) systems are defined in Recommendations ITU-R BT.1306 and ITU-R BT.1877, respectively; d) that the criteria for planning digital terrestrial television s
12、ervices in the VHF/UHF bands are given in Recommendations ITU-R BT.1368 and BT.2033; e) that frequency planning parameters for Digital video broadcasting - terrestrial (DVB-T) in Region 1 and the Islamic Republic of Iran are defined by the GE06 Agreement which planned Band III (174-230 MHz) for digi
13、tal sound and television broadcasting and Bands IV/V (470-862 MHz) for digital television broadcasting. The GE06 Agreement gives the framework for television frequency planning coordination among Region 1 countries and the Islamic Republic of Iran; f) that the International Electrotechnical Commissi
14、on (IEC) has responsibilities relating to television receiver standards and methods of measurement and definitions; g) that nominal characteristics of and measurement methods for digital television receivers have been established for the various DTTB systems in the IEC; h) that while there is a nece
15、ssary connection between the receiver characteristics required as limit specifications for manufacturing, efficient spectrum use and frequency planning should take account of the complete receiving system and should be based on a representative reference receive system rather than “worst-case” limit
16、 specifications, recommends 1 that the common characteristics of reference television receiving systems given in Annex 1 should be employed as a basis for frequency planning; 2 Rec. ITU-R BT.2036-1 2 that the characteristics of reference first-generation television receiving systems given in Annex 2
17、 should be employed as a basis for frequency planning1; 3 that the characteristics of reference second-generation television receiving systems in Annex 3 should be employed as a basis for frequency planning1. Annex 1 Digital terrestrial television common receiving system characteristics for frequenc
18、y planning Tables 1 to 5 below provide values for common receiver characteristics applicable to any digital terrestrial television systems in frequency planning. TABLE 1 Receiver antenna height (m) Reception mode Fixed roof top reception Portable outdoor/ mobile Portable indoor Receiver antenna heig
19、ht above ground 10 1.5 1.5 TABLE 2 Receiving antenna directivity Receiving antenna directivity See Rec. ITU-R BT.419 TABLE 3 Receiver noise figure (dB) Band I Band III Bands IV/V Frequency (MHz) 47-68 174-230 470-862 Receiver noise figure 7 to 10 6 to 10 6 to 7 1 The definitions, methods of measurem
20、ent and presentation of results used in the Annex are consistent with relevant IEC standards/specifications. Rec. ITU-R BT.2036-1 3 TABLE 4 Antenna gain (dBd) Band I Band III Band IV Band V Frequency (MHz) 47-68 174-230 470-582 582-862 Fixed roof top reception 4 5 to 7 8 to 10 9 to 12 TABLE 5 Feeder
21、 loss (dB) Band I Band III Band IV Band V Frequency (MHz) 47-68 174-230 470-582 582-862 Fixed roof top reception 1 2 3 to 4 4 to 5 Annex 2 Digital terrestrial television first-generation reference receiving system characteristics for frequency planning2 1 Introduction The characteristics of referenc
22、e first-generation television receiving systems given in this Annex are to be employed as a basis for frequency planning. 1.1 DVB-T reference receiver characteristics Reference values for the parameters of a DVB-T reference receiving system are defined for three different reception modes3: Reception
23、 mode RM1 for fixed roof top reception. Reception mode RM2 for portable outdoor reception or mobile reception. Reception mode RM3 for portable indoor reception. Tables 6 and 7 give the reference DVB-T receiver characteristics for all three RMs for Band III, 7 and 8 MHz channel raster, respectively.
24、Table 8 gives the reference DVB-T receiver characteristics for all three RMs for Bands IV/V. 2 As DTTB receive system technology is improving rapidly, administrations are invited to study any improvement of the planning parameters which can result from improved receive system characteristics. 3 Thos
25、e reception modes are equivalent to the Reference Planning Configurations for fixed roof-top, portable outdoor/mobile and portable indoor reception of the GE06 Agreement. 4 Rec. ITU-R BT.2036-1 The reference parameters of the RMs that are given in Tables 6, 7 and 8 are not associated with a particul
26、ar DVB-T system variant or a real DVB-T network implementation; rather, they stand for a large number of different real implementations. TABLE 6 Reference DVB-T receiver characteristics in Band III, 7 MHz channel raster Reception mode RM1 RM2 RM3 Frequency fr (MHz) 200 200 200 Equivalent noise bandw
27、idth (MHz) 6.66 6.66 6.66 Receiver noise figure (dB) 7 7 7 Receiver noise input power (dBW) 128.7 128.7 128.7 RF signal/noise ratio Reference C/N (dB) 21 19 17 Minimum receiver signal input power (dBW) 107.7 109.7 111.7 Min. equivalent receiver input voltage, 75 (dB(V) 31 29 27 Reference Minimum fie
28、ld strength (Emin)ref (dB(V/m) at fr = 200 MHz 38.5 43.5 41.5 ACS (dB) See Note 1 below NOTE 1 Information on the calculation of adjacent channel selectivity (ACS) values for DVB-T receivers can be found in Recommendation ITU-R BT.1368-10. TABLE 7 Reference DVB-T receiver characteristics in Band III
29、, 8 MHz channel raster Reception mode RM1 RM2 RM3 Frequency fr (MHz) 200 200 200 Equivalent noise bandwidth (MHz) 7.61 7.61 7.61 Receiver noise figure (dB) 7 7 7 Receiver noise input power (dBW) 128.2 128.2 128.2 RF signal/noise ratio Reference C/N (dB) 21 19 17 Minimum receiver signal input power (
30、dBW) 107.2 109.2 111.2 Min. equivalent receiver input voltage, 75 (dB(V) 31.5 29.5 27.5 Rec. ITU-R BT.2036-1 5 TABLE 7 (end) Reception mode RM1 RM2 RM3 Reference Minimum field strength (Emin)ref (dB(V/m) at fr = 200 MHz 39 44 42 ACS (dB) See Note 1 below NOTE 1 Information on the calculation of ACS
31、values for DVB-T receivers can be found in Recommendation ITU-R BT.1368-10. TABLE 8 Reference DVB-T receiver characteristics in Band IV/V, 8 MHz channel raster Reception mode RM1 RM2 RM3 Frequency fr (MHz) 650 650 650 Equivalent noise bandwidth (MHz) 7.61 7.61 7.61 Receiver noise figure (dB) 7 7 7 R
32、eceiver noise input power (dBW) 128.2 128.2 128.2 RF signal/noise ratio Reference C/N (dB) 21 19 17 Minimum receiver signal input power (dBW) 107.2 109.2 111.2 Min. equivalent receiver input voltage, 75 (dB(V) 31.5 29.5 27.5 Reference Minimum field strength (Emin)ref (dB(V/m) at fr = 650 MHz 47 52 5
33、0 ACS (dB) See Note 1 below NOTE 1 Information on the calculation of ACS values for DVB-T receivers can be found in Recommendation ITU-R BT.1368-10. The formula for calculating minimum field strength is given in Appendix 1 to Annex 2 of Recommendation ITU-R BT.1368-10. For other frequencies, the ref
34、erence minimum field strength values in Tables 6 and 7 above shall be adjusted by adding the correction factor defined according to the following rule: (Emin)ref(f) = (Emin)ref(fr) + 20 log10 (f/fr) where f is the actual frequency and fr the reference frequency of the relevant band quoted in the Tab
35、le. Further planning parameters, including C/N values, protection ratios and overloading thresholds for particular DVB-T system variants, are given in Recommendation ITU-R BT.1368. 6 Rec. ITU-R BT.2036-1 Some parameters concerning the receiving DVB-T system are presented in the following Tables 9 an
36、d 10 below. Annex 1 provides common receiver characteristics applicable to any digital terrestrial television systems in frequency planning. TABLE 9 Antenna gain (dBd) Band III Band IV Band V Frequency (MHz) 174-230 470-582 582-862 Fixed roof top reception 7 10 12 Portable/mobile reception 2.2 0 0 T
37、ABLE 10 Feeder loss (dB) Band III Band IV Band V Frequency (MHz) 174-230 470-582 582-862 Fixed roof top reception 2 3 5 1.2 Reference receiver characteristics for System A (ATSC) Reference values for the parameters of an advanced television systems committee (ATSC) reference receiving system (System
38、 A) with a 6 MHz bandwidth are given in Tables 11 through 15 in the following sections. The threshold values for the reference receiver in the following sections are intended to assure reliable reception and may differ from the protection criteria for planning and channel allocation in Recommendatio
39、n ITU-R BT.1368. 1.2.1 RF characteristics Table 11 tabulates the basic RF performance characteristics. TABLE 11 RF characteristics for a reference 6 MHz ATSC receiving system Parameters Reference Guideline Frequency ranges (MHz) 47-68, 174-216, 470-806 Equivalent noise bandwidth (MHz) 6 Minimum bit
40、error rate (BER) for reception 3 106 Maximum receiver sensitivity (dBm) 83 Minimum receiver overload (dBm) 5 Minimum S/N (dB) 15.19 Minimum noise burst duration performance 165 s at 10 Hz repetition Rec. ITU-R BT.2036-1 7 1.2.2 Co-channel interference thresholds Table 12 provides the minimum thresho
41、lds for rejection of co-channel interference at a “weak wanted” ATSC signal level (68 dBm) and a “moderate wanted” ATSC signal level (53 dBm) at the receiver input. Note that different thresholds are required for interference from ATSC digital television signals as opposed to analogue television int
42、erference (National television systems committee (NTSC). TABLE 12 Co-channel rejection thresholds for a 6 MHz reference ATSC receiving system interfered with by a 6 MHz ATSC digital signal or an NTSC analogue signal Type of Interference Co-channel wanted/unwanted ratio (dB) Weak wanted ATSC signal (
43、68 dBm) Moderate wanted ATSC signal (53 dBm) ATSC interference into ATSC +15.5 +15.5 NTSC interference into ATSC +2.5 +2.5 NOTE All ATSC values are average power; all NTSC values are peak power. 1.2.3 First adjacent channel interference thresholds Table 13 tabulates the minimum rejection thresholds
44、for first adjacent channel interference at various “wanted” signal levels at the receiver input. It is noted that protection ratio values are provided in Recommendation ITU-R BT.1368. Protection ratios are measured wanted-to-unwanted signal ratios that include the effects of receiver filtering and t
45、he emission spectrum of the transmitted signal, whereas adjacent channel selectivity defines a characteristic that is specific to the receiving system. TABLE 13 First adjacent channel selectivity thresholds for a reference 6 MHz ATSC receiving system from a 6 MHz interference signal (digital or anal
46、ogue) in the lower (N 1) or upper (N + 1) adjacent channels at given wanted signal average power levels at the receiver input Type of Interference Adjacent channel wanted/unwanted ratio (dB) Weak wanted (68 dBm) Moderate wanted (53 dBm) Strong wanted (28 dBm) Lower ATSC interference into ATSC (N 1)
47、33 33 20 Upper ATSC interference into ATSC (N+1) 33 33 20 Lower NTSC interference into ATSC (N 1) 40 35 26 Upper NTSC interference into ATSC (N+1) 40 35 26 NOTE All NTSC values are peak power; all ATSC values are average power. 8 Rec. ITU-R BT.2036-1 1.2.4 Multiple adjacent channel interference thre
48、sholds Multiple adjacent channel selectivity thresholds for a reference 6 MHz ATSC receiving system from a 6 MHz interference signal (digital or analogue) in the multiple adjacent channels, N2 to N15, at given wanted signal average power levels at the receiver input can be found in Table 5 of Recomm
49、endation ITU-R BT.1368. Multiple interferers on various adjacent channels significantly impact the adjacent channel selectivity thresholds for a reference 6 MHz ATSC receiving system. Combinations of unwanted signals can cause interference on a wanted channel. In particular, if the wanted channel is N, signals on channels N + K and N + 2K (or N K and N 2K), where K is an integer between 1 and 10, will combine to cause interference into the wanted channel N. The ratio between the wanted signal and the
