Frequency and Network Planning Aspects of DVB-T2
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Report ITU-R BT.2254-3 (03/2017) Frequency and network planning aspects of DVB-T2 BT Series Broadcasting service (television) ii Rep. ITU-R BT.2254-3 Foreword The role of the Radiocommunication 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 policy 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/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 and the ITU-R patent information database can also be found. Series of ITU-R Reports (Also available online at http://www.itu.int/publ/R-REP/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 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-satellite and fixed service systems SM Spectrum management Note: This ITU-R Report was approved in English by the Study Group under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2017 ITU 2017 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rep. ITU-R BT.2254-3 1 REPORT ITU-R BT.2254-3 Frequency and network planning aspects of DVB-T2 (2012-2013-2014-2017) DVB-T2 is a 2nd generation terrestrial broadcast transmission system developed by DVB project since 2006. The main purpose was to increase capacity, ruggedness and flexibility to the DVB-T system. The first version was published by ETSI as EN 302 755 in 2009. This Report provides guidance on frequency and network planning of DVB-T2. It has been developed by EBU Members involved in planning of DVB-T2 networks. It is intended to help broadcast network operators in their planning and administrations in defining the most suitable set of parameters from the large possibilities offered by the DVB-T2 system. In its present form, it has been published as EBU Tech 3348 ‘Frequency and network aspects of DVB-T2’. TABLE OF CONTENTS Page 1 Introduction .................................................................................................................... 4 1.1 Commercial requirements for DVB-T2 .............................................................. 4 1.2 DVB-T and DVB-T2; what is the difference? .................................................... 4 1.3 Notes on this Report ........................................................................................... 5 2 System properties ........................................................................................................... 6 2.1 Bandwidth ........................................................................................................... 6 2.2 FFT size .............................................................................................................. 7 2.3 Modulation scheme and guard interval ............................................................... 8 2.4 Available data rate .............................................................................................. 9 2.5 Carrier-to-noise ratio (C/N) ................................................................................ 11 2.6 Rotated constellation .......................................................................................... 20 2.7 Scattered pilot patterns ....................................................................................... 23 2.8 Time interleaving ................................................................................................ 27 2.9 Bandwidth extension .......................................................................................... 28 2.10 Phase noise .......................................................................................................... 29 2.11 Choice of system parameters .............................................................................. 29 3 Receiver properties, sharing and compatibility, network planning parameters ............. 31 3.1 Minimum receiver signal input levels ................................................................ 31 2 Rep. ITU-R BT.2254-3 Page 3.2 Signal levels for planning ................................................................................... 32 3.3 Examples of signal levels for planning ............................................................... 33 3.4 Protection ratios .................................................................................................. 40 3.5 DVB T2 equalization interval (EI) ..................................................................... 47 4 New planning features .................................................................................................... 50 4.1 SFN extension ..................................................................................................... 50 4.2 Degradation beyond guard interval..................................................................... 58 4.3 MISO (multiple input single output) .................................................................. 60 4.4 Time-frequency slicing (TFS) ............................................................................ 66 4.5 Time slicing ........................................................................................................ 71 4.6 Physical layer pipes ............................................................................................ 71 4.7 Peak-to-average power ratio (PAPR) reduction techniques ............................... 74 4.8 Future extension frames (FEF) ........................................................................... 74 5 Implementation scenarios ............................................................................................... 75 5.1 Introduction ......................................................................................................... 75 5.2 Scenario 1: MFN rooftop reception and a transition case .................................. 75 5.3 Scenario 2: SFN rooftop reception, maximum coverage .................................... 76 5.4 Scenario 3: SFN rooftop reception, moderate coverage ..................................... 76 5.5 Scenario 4: Portable reception (maximum data rate).......................................... 78 5.6 Scenario 5: Portable reception (maximum coverage area extension) ................. 79 5.7 Scenario 6: Portable reception (optimal spectrum usage) .................................. 79 5.8 Scenario 7: Mobile reception (1.7 MHz bandwidth in Band III) ....................... 80 5.9 Scenario 8: Portable and mobile reception (common MUX usage by different services) – Multiple PLPs ................................................................................... 80 5.10 Overview of scenarios ........................................................................................ 81 6 Transition to DVB-T2 .................................................................................................... 83 6.1 DVB-T2 in GE06 ................................................................................................ 83 6.2 Transition scenarios ............................................................................................ 85 7 References ...................................................................................................................... 88 Annex 1 – Planning methods, criteria and parameter .............................................................. 90 A1.1 Reception modes ................................................................................................. 90 Rep. ITU-R BT.2254-3 3 Page A1.2 Coverage definitions ........................................................................................... 92 A1.3 Calculation of signal levels ................................................................................. 93 Annex 2 – Estimation of the net data capacity of a DVB-T2 multiplex .................................. 101 Annex 3 – Nyquist time for frequency and time interpolation vs. guard interval ................... 111 Annex 4 – Derivation and comparison of C/N values ............................................................. 113 A4.1 Raw values of C/N for the derivation of the Rice and Rayleigh Channel Case . 113 A4.2 Comparison of C/N values calculated according to the methodology of § 2.5 and measurement results ..................................................................................... 114 Annex 5 – DVB-T2-Lite .......................................................................................................... 120 A5.1 Introduction ........................................................................................................