Standardized DVB-T2 RF specifications - DigitalEurope

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Most of these options can be tested using large sets of functional tests, however any changes to the DVB-T2 mode chosen for broadcasting must also be RF performance tested with the legacy receiver population to ensure a smooth transition. Table 1 – Selected DVB-T2 modes for performance testing Mode: 1 2 3 4 5 6 1 7 8 9 Test Coverage FFTSIZE E=Ext. N=Normal AWGN & Static 0dB Echo Tests All Performance Tests CCI Tests with modes 4 & 5 SFN SFN MFN SFN SFN 8KE 16KE 16KE 16KN 32KN 32KN 32KE 32KE 32KE GI 1/16 19/128 19/256 1/32 1/32 1/8 1/128 1/16 1/32 LF 252 120 118 128 62 44 60 62 62 SISO/MISO SISO SISO SISO SISO SISO/ SISO SISO SISO SISO (MISO) 2 PAPR None TR None TR TR TR None TR TR Frames per superframe (NT2) Channel Bandwidth (MHz) Signal Bandwidth (MHz) 2 2 2 2 2 2 2 2 2 8 8 8 8 8 7 8 8 8 7.71 7.77 7.77 7.61 7.61 7.61 7.77 7.77 7.77 Pilot Pattern PP4 PP3 PP2 PP4 PP4 PP2 PP7 PP4 PP6 L1 Modulation QPSK 16QAM 64QAM 64QAM 64QAM 64QAM 64QAM 64QAM 64QAM PLP #0 Type 1 1 1 1 1 1 1 1 1 Modulation QPSK 16QAM 64QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM Rate 1/2 2/3 2/3 3/5 3/5 3/5 2/3 2/3 3/4 FEC Type 64800 64800 64800 64800 64800 64800 64800 64800 64800 Rotated QAM Yes Yes Yes Yes Yes Yes Yes Yes Yes FEC blocks per interleaving frame TI blocks per frame (N_TI) T2 frames per Interleaving Frame (P_I) Frame Interval (I_JUMP) Type of timeinterleaving Time Interleaving Length 51 96 138 202 196/ (195) 132 202 200 204 3 3 3 3 3 2 3 3 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 3 3 3 3 3 2 3 3 3 Data Rate Mbit/s 6.8601 16.7738 26.2131 33.1148 Sensitivity dBm (NF=7dB) 33.1667/( 32.9974) 25.2380 40.2146 36.5519 43.2113 -94.5 -86.6 -81.4 -78.7 -78.8 -78.8 -77.8 -77.2 -75.7 1 Note performance testing for the 7MHz mode 6 should use frequencies in VHF band III. 2 When mode 5 is used in MISO mode, the number of FEC blocks per interleaving frame needs to be set to 195 instead of the SISO value of 196. >>2 of 27
All single PLP modes use HEM (High Efficiency) input stage mode. There is no null packet deletion, in-band signaling, L1 repetition or auxiliary streams. In order to comply with v1.2.1 of the DVB-T2 specification, ISSY should be used in all but the simplest of modes and so the use of ISSY is explicitly indicated in this document where it is required. Network operators should be aware that some signal configurations allowed by version 1.1.1 but prohibited by version 1.2.1 might not be correctly received and decoded by receivers designed to the later versions. It is therefore recommended that only parameter combinations permitted by version 1.2.1 and later be used. The L1 signaling may however be transmitted according to version 1.1.1. To reduce receiver testing times, modes 1-4 in Table 1 are only tested for basic AWGN and 0dB echo C/N, and mode 4 is additionally used for co-channel ATV interference testing. Modes 5-9 represent more commonly used SFN and MFN modes and are specified with all the performance tests. 2- RF FREQUENCIES This specification covers operation in VHF band III (7MHz channel bandwidth) and/or UHF bands IV and V (8MHz channel bandwidth). Receivers should be able to operate with transmission network frequency errors of up to +/-50 KHz, and channel bandwidths of 7 and/or 8MHz. 3- FAILURE POINT CRITERIA Due to the sharp “cliff-edge” BER characteristic of LDPC decoding, BER measurements are very time consuming to perform for DVB-T2 measurements, but picture failure measurements are easier to make than for DVB-T. For this reason, two different picture failure point criteria are defined for different tests: 1. Picture failure point1 (PFP1), defined as the minimum C/N or C/I value when two out of three 10-second periods are free from picture artefacts. 2. Picture failure point2 (PFP2), defined as the minimum C/N or C/I value when two out of three 20-second periods are free from picture artefacts. This reduces the probability of incorrect results when testing DVB-T2 impulse noise immunity for patterns 7-12 which have a long burst repetition period of 1000 ms. 4- MINIMUM RECEIVER SIGNAL INPUT LEVELS The receiver should have a noise figure equal or better than 7 dB. The required minimum input signal levels (P min) for PFP1 are: P min = -98.1 dBm + C/N [dB ] [for 8 MHz modes 1-3, 7-9 ] P min = -98.2 dBm + C/N [dB ] [for 8 MHz modes 4-5 ] P min = -98.7 dBm + C/N [dB ] [for 7 MHz mode 6] where C/N is specified in Table 2 >>3 of 27
Page 1: DIGITALEUROPE White paper: Standard
Page 5 and 6: (C/N)0dB_table_44 = 0dB echo C/N fo
Page 7 and 8: 8- 4- Immunity to LTE signals in ot
Page 9 and 10: Table 8 - Immunity to co-channel in
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Page 13 and 14: Test No Pulses per burst Figure 3 -
Page 15 and 16: FEC Type 64800 64800 64800 64800 64
Page 17 and 18: REFERENCES AND ACKNOWLEDGEMENTS 1.
Page 19 and 20: TS0 TS1 PLP0 PLP1 Common PLP Figure
Page 21 and 22: only only only Frames per superfram
Page 23 and 24: Modulation 256QAM 256QAM 256QAM Rat
Page 25 and 26: Design delay (samples) 939080 93579
Page 27: ABOUT DIGITALEUROPE DIGITALEUROPE r

Standardized DVB-T2 RF specifications - DigitalEurope

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