1、 Recommendation ITU-R BT.2033-1 (02/2015) Planning criteria, including protection ratios, for second generation of digital terrestrial television broadcasting systems in the VHF/UHF bands BT Series Broadcasting service (television) ii Rec. ITU-R BT.2033-1 Foreword The role of the Radiocommunication
2、Sector is to ensure the rational, 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 pol
3、icy functions of the Radiocommunication 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/
4、IEC referenced in Annex 1 of Resolution 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
5、and the ITU-R patent information 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 Broadc
6、asting service (television) F Fixed 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-sa
7、tellite and fixed service systems 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
8、 Geneva, 2015 ITU 2015 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R BT.2033-1 1 RECOMMENDATION ITU-R BT.2033-1 Planning criteria, including protection ratios, for second generation of digital terrestrial te
9、levision broadcasting systems in the VHF/UHF bands (2013-2015) Scope This Recommendation defines planning criteria, including protection ratios, for various methods of providing second generation digital terrestrial television broadcasting (DTTB) systems in the VHF/UHF bands. Keywords DTTB, DVB-T2,
10、ISDB-T, planning criteria, protection ratio, second generation The ITU Radiocommunication Assembly, considering a) that the digital terrestrial television systems for use in broadcasting bands have been developed in Recommendation ITU-R BT.1306, which are referred to as the current systems; b) that
11、these current first generation DTTB systems have been deployed for the transmission of digital terrestrial television services in the VHF/UHF bands; c) that analogue television services have migrated out of the VHF/UHF television bands within many administrations; d) that DTTB television services wi
12、ll remain in use for a considerable period of time; e) that many types of interference, including co-channel and adjacent channel, ignition noise, multipath and other signal distortions exist in the VHF/UHF bands; f) that recent developments in the field of channel coding and modulation have produce
13、d new techniques with performances approaching the Shannon limit; g) that the error-correction, data framing, modulation and emission methods for the second generation worldwide digital terrestrial television broadcasting systems have been defined in Recommendation ITU-R BT.1877; h) that these new d
14、igital techniques would offer better spectrum and/or power efficiency, in comparison to the current systems, whilst maintaining the possibility to be flexibly configured to cope with the specific broadcasting bandwidth and power resources; i) that the recommended system makes use of such techniques
15、and thus allows for a wide-ranging trade-off between operation under minimal C/N levels or maximum transmission capacity; j) that the planning criteria for various methods of providing first generation digital terrestrial television services in the VHF/UHF bands have been defined in Recommendation I
16、TU-R BT.1368; k) that the availability of consistent sets of planning criteria agreed by administrations will facilitate the introduction of second generation digital terrestrial television services, 2 Rec. ITU-R BT.2033-1 recommends that the relevant planning criteria, including protection ratios (
17、PRs) and the relevant minimum field strength values given in Annexes 1 and 2 should be used as the basis for frequency planning for second generation digital terrestrial television services. NOTE Annexes 4 and 6 are an integral part of the Recommendation. Annexes 3 and 5 are provided for information
18、. Introduction This Recommendation contains the following Annexes: Annex 1 Planning criteria, including protection ratios, for DVB second generation digital terrestrial television systems in the VHF/UHF bands for 7 and 8 MHz channel bandwidth Annex 2 Planning criteria, including protection ratios, f
19、or DVB second generation digital terrestrial television systems in the VHF/UHF bands for 6 MHz channel bandwidth Annex 3 Additional test results from UK and Russian Federation Annex 4 Other planning factors such as antenna types and antenna discrimination, height loss, etc. Annex 5 Subjective failur
20、e point description Annex 6 Tropospheric and continuous interference. General The RF protection ratio is the minimum value of wanted-to-unwanted signal ratio, usually expressed in decibels at the receiver input. The protection ratios defined in this recommendation are based on measurements using the
21、 test methodology and signal power references defined in 1. Administrations are invited to contribute with additional results of measurements in order to complete this Recommendation. Wanted digital terrestrial television systems The protection ratios for digital terrestrial television systems apply
22、 to both continuous and tropospheric interference. The protection ratios refer to the centre frequency of the wanted digital terrestrial television system. Because a digital television receiver needs to operate successfully in the presence of high level interference signals on nearby channels, a hig
23、h degree of receiver front-end linearity is required. The protection ratios for digital terrestrial television systems as the interfering system are those for the case where the wanted and unwanted signals are not synchronized and/or do not have a common programme source. Protection ratios are measu
24、red at based on setting the interference conditions to be at the onset of picture failure using the subjective failure point (SFP) method as defined in 1. Rec. ITU-R BT.2033-1 3 TABLE OF CONTENTS Page Annex 1 (Normative) Planning criteria, including protection ratios, for DVB second generation digit
25、al terrestrial television systems in the VHF/UHF bands for 7 and 8 MHz channel bandwidth 5 1 Protection ratios for DVB-T2 wanted digital terrestrial television signals 5 1.1 Wanted signal configuration . 5 1.2 Characteristics of the LTE interfering signal 6 1.3 Notes applying to protection ratio and
26、 overload threshold tables 6 1.4 Protection of a DVB-T2 digital terrestrial television signal interfered with by a DVB-T2 digital terrestrial television signal 7 1.5 Protection ratios and overload thresholds for DVB-T2 interfered with by LTE base station and user equipment signals . 8 1.6 Correction
27、 factors for different wanted DVB-T2 system variants and different reception conditions 14 1.7 Selection of PR and Oth for sharing studies 15 1.8 Effect of transient interference on protection ratios . 15 2 Minimum field strengths for DVB-T2 terrestrial digital television . 16 3 References 19 Attach
28、ment 1 to Annex 1 Calculation of minimum field strength and minimum median equivalent field strength . 19 Attachment 2 to Annex 1 Can tuner test results 20 Attachment 3 to Annex 1 Effect of transient interference on protection ratios 24 1 Background . 24 2 Measurements . 25 2.1 Signal sources . 25 2
29、.2 Frequency offsets 26 2.3 Measurement procedure 26 2.4 Receivers tested 27 3 Results 27 4 Conclusions 30 Attachment 4 to Annex 1 TV tuner technologies and characteristics . 31 4 Rec. ITU-R BT.2033-1 Page Annex 2 (Normative) Planning criteria, including protection ratios, for DVB second generation
30、digital terrestrial television systems in the VHF/UHF bands for 6 MHz channel bandwidth 32 1 Protection ratios for 6 MHz DVB-T2 wanted digital terrestrial television signal 32 1.1 Protection ratios for a wanted DVB-T2 signal interfered with by a digital terrestrial television signal 32 1.2 Protectio
31、n ratios for a wanted DVB-T2 signal interfered with by an analog terrestrial television signal 35 Annex 3 (Informative) Additional test results 36 1 Additional test result from the UK . 36 2 Additional test result from the Russian Federation 36 Annex 4 (Normative) Other planning factors . 37 1 Field
32、 strength distribution with location . 37 2 Reception using portable equipment inside buildings and vehicles . 38 2.1 Height loss: Lh . 38 2.2 Building entry loss: Lb 38 2.3 Vehicle entry loss: Lv 39 3 Receiving antenna discrimination 39 4 Antennas for portable and mobile receivers . 39 4.1 Antennas
33、 for portable reception 39 4.2 Antennas for hand-held reception . 39 4.3 Antennas for mobile reception 40 5 Man-Made Noise (MMN) 40 Annex 5 (Informative) Failure point assessment methods 41 1 Subjective failure point (SFP) method for protection ratio measurements 41 Annex 6 (Normative) Tropospheric
34、and continuous interference 42 1 Tropospheric and continuous interference . 42 Rec. ITU-R BT.2033-1 5 Annex 1 (Normative) Planning criteria, including protection ratios, for DVB second generation digital terrestrial television systems in the VHF/UHF bands for 7 and 8 MHz channel bandwidth 1 Protecti
35、on ratios for DVB-T2 wanted digital terrestrial television signals 1.1 Wanted signal configuration To reduce the number of measurements and tables, it is proposed that protection ratio measurements for DVB-T2 systems should be made with the following mode shown in Table 1. Protection ratio values fo
36、r the different required operational modes can be calculated from the given measured values. All data in this Annex corresponds to this mode unless stated otherwise. TABLE 1 Preferable DVB-T2 mode type for measurements on protection ratios Overall Parameter Value FFTSIZE 32 K GI 1/128 Data symbols 5
37、9 SISO/MISO SISO PAPR None Frames per superframe 2 Bandwidth 8 MHz Extended bandwidth mode Yes Pilot pattern PP7 L1 Modulation 64-QAM PLP #0 Type 1 Modulation 256-QAM Rate 2/3 FEC Type 64 800 Rotated QAM Yes FEC blocks per interleaving frame 202 TI blocks per frame (N_TI) 3 T2 frames per interleavin
38、g frame (P_I) 1 Frame interval (I_JUMP) 1 Type of time-interleaving 0 Time interleaving length 3 C/N (AWGN Channel) dB 19.7 Data rate Mbit/s 40.2 6 Rec. ITU-R BT.2033-1 1.2 Characteristics of the LTE interfering signal The protection ratios and overload thresholds for LTE base stations (BS) and User
39、 Equipment (UE) in this recommendation are based on measurements using recorded 10 MHz wide LTE waveforms from real BS and UE devices with three different traffic loadings. These recordings were filtered to remove out of band recording artifacts and formatted into I/Q data suitable for replay from s
40、tandard laboratory vector signal generators. The BS traffic loadings were categorized as: a) Idle consisting mainly of synchronization and broadcast signals with occasional data; b) 50% loading medium loading; c) 100% loading where all the resource blocks were used all the time. The UE traffic loadi
41、ngs were categorized as: a) 1 Mbit/s light loading where only a small number of resource blocks are used for some of the time; b) 10 Mbit/s medium loading; c) 20 Mbit/s high loading. There is significantly more time variation in the power of the lighter traffic loaded waveforms which can cause PR an
42、d Oth degradation in some receivers. 1.3 Notes applying to protection ratio and overload threshold tables To avoid repetition, unless stated otherwise, the following notes apply to Tables 2 to 11 and Tables 14 to 18. NOTE 1 The 90th percentile for the protection ratio value corresponds to the protec
43、tion of 90% of receivers measured, with respect to the given frequency offset and parameter; whereas the 10th percentile for the overload threshold should be used to protect 90% of receivers measured. NOTE 2 f is the difference between the centre frequency of the unwanted channel and the centre freq
44、uency of the wanted channel. NOTE 3 NR: Oth is not reached. That is at this frequency offset PR is the predominant criterion. NOTE 4 PR is applicable unless the interfering signal level is above the corresponding Oth. If the interfering signal level is above the corresponding Oth, the receiver is in
45、terfered with by the interfering signal whatever the signal to interference ratio is. NOTE 5 At wanted signal level close to receiver sensitivity, noise should be taken into account, e.g. at sensitivity +3 dB, 3 dB should be added to the PR. NOTE 6 PR for different system variants and various recept
46、ion conditions can be obtained using the correction factors in Table 10 of this Annex. The overload threshold is assumed to be independent of system variant and reception conditions. NOTE 7 Protection ratios are rounded to the nearest integer. NOTE 8 The Ricean and static Rayleigh channels are defin
47、ed in section 14.1 of ETSI TS 102 831 Digital Video Broadcasting (DVB); Implementation guidelines for a second generation digital terrestrial television broadcasting system (DVB-T2). They are also described in ETSI EN 300 744 Digital Video Broadcasting (DVB); Framing structure, channel coding and mo
48、dulation for digital terrestrial television (DVB-T). NOTE 9 The LTE BS interference signals used in the measurements had ACLRs of 60 dB or greater for N-1, and significantly higher ACLRs for N-2 and beyond. Rec. ITU-R BT.2033-1 7 Tables 2 to 11 and Tables 14 to 18 show protection ratios for the DVB-
49、T2 wanted digital terrestrial television signals interfered with: by DVB-T2 digital terrestrial television signals; by LTE base station (BS) signals; by LTE user equipment (UE) signals. 1.4 Protection of a DVB-T2 digital terrestrial television signal interfered with by a DVB-T2 digital terrestrial television signal The values in Table 2 are theoretical values calculated for the mode in Table 1 using the method described in Report ITU-R BT.2254-2012. TABLE 2 Co-channel protection ratios (
