Standardized DVB-T2 RF specifications - DigitalEurope

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8- 2- Immunity to analogue signals in other channels The immunity for interference from analogue TV signals in adjacent and non-adjacent channels is specified as the maximum ratio of the interference to wanted signal (I/C) for reception (PFP1). Table 3 shows recommended I/C levels for different types of analogue TV interference. Table 3 – Immunity to analogue signals on other channels (I/C PFP1) Mode N±1 PAL G PAL I1 N±1 PAL B 3 N-1 SECAM L PAL D1 4 N+1 SECAM L PAL D1 4 N±m (m�1) andN+9 5 SECAM L PAL D1 4 N±m (m�1) and image channel 5 PAL B/G/I1 5 Bandwidth: 8 MHz 7 MHz 8 MHz 8 MHz 8 MHz 7/8 MHz 5 – 32KN 256Q 3/5 1/32 PP4 8MHz 6 – 32KN 256Q 3/5 1/8 PP2 7MHz 7 – 32KE 256Q 2/3 1/128 PP7 8MHz 8 – 32KE 256Q 2/3 1/16 PP4 8MHz 9 – 32KE 256Q 3/4 1/32 PP6 8MHz 8- 3- Immunity to DTT signals in other channels 36 28 30 43 44 32 43 35 27 29 42 43 34 26 28 41 42 33 25 27 40 41 The immunity for interference from digital TV signals in adjacent and non-adjacent channels is specified as the maximum ratio of the interference to wanted signal (I/C) for reception (PFP1). Table 4 shows recommended I/C levels for DVB-T/T2 interference. Note immunity to digital signals in other channels should use a DVB-T or non-extended DVB- T2 interferer for the 7MHz mode and an extended DVB-T2 mode interferer for 8MHz modes. Table 4 – Immunity to digital signals on other channels (I/C PFP1) Mode N±1 N±2 N±3 N±m (m�1, m>3) except N+9 5 5 – 32KN 256Q 3/5 1/32 PP4 8MHz 27 37 42 45 30 6 – 32KN 256Q 3/5 1/8 PP2 7MHz 26 36 41 44 29 7 – 32KE 256Q 2/3 1/128 PP7 8MHz 26 36 41 44 29 8 – 32KE 256Q 2/3 1/16 PP4 8MHz 25 35 40 43 28 9 – 32KE 256Q 3/4 1/32 PP6 8MHz 24 34 39 42 27 3 Note that if PAL B N-1 is using NICAM sound, the digital channel on N cannot be used without an offset, because of the overlapping spectrums. The offset to be used in this test is recommended to be +167KHz on the wanted signal. 4 Note that the figures for PAL D1 are provisional. Performance for PAL D/K is similar to D1. 5 Note that N+9 is a popular choice for the image channel in tuner designs using 36MHz IF for 8MHz channel systems. For 7MHz systems, the image channel is N+10 (70MHz). N+9 5 >>6 of 27
8- 4- Immunity to LTE signals in other channels Figure 1 shows the harmonized 800MHz spectrum organization for LTE deployment. There is only a small 1 MHz guard band between the top TV channel 60 and the lowest LTE base station in block A. Also the LTE handset (UE) block C falls on the N+9 image channel of TV tuner designs employing a 36MHz IF frequency. It is important to test immunity to these types of adjacent channel interference. Recent tests on existing DTT receivers have shown the most challenging form of interference for some receivers is when the LTE interferer is bursty – typical of a lightly loaded or idling LTE network. Signals captured from a real LTE base station (BS) and handset (UE) are used as interference sources to test that receivers provide a reasonable level of immunity against this type of bursty interference. The I/C specification set in Table 5 is designed to reject badly behaving receivers. These interference signals are in the following files available on the DIGITALEUROPE website: 766- 774 MHz DTT CH58 � Base Station: LTE_BS-idle_V2.wv (a lightly loaded 10MHz LTE BS signal consisting mainly of synchronisation and broadcast signals) � Handset : LTE_UE_1Mbs_V2.wv (a lightly loaded 10MHz LTE UE signal with 1Mbit/s data traffic) 774- 782 MHz DTT CH59 Figure 1– Harmonised 800MHz spectrum for LTE Deployment 782- 790 MHz DTT CH60 791- 796 MHz 1 MHz Guard Band 796- 801 MHz 10 MHz BS Block A 801- 806 MHz 806- 811 MHz 10 MHz BS Block B 811- 816 MHz Downlink (BS) 6 blocks of 5MHz or 3 blocks of 10 MHz 816- 821 MHz 10 MHz BS Block C 821-832 MHz 11 MHz Duplex Gap 832- 837 MHz 837- 842 MHz 10 MHz UE Block A 842- 847 MHz 847- 852 MHz 10 MHz UE Block B 852- 857 MHz Uplink (UE) 6 blocks of 5MHz or 3 blocks of 10 MHz Table 5 – Immunity to LTE signals on other channels (I/C PFP1) Mode Note : Wanted signal centre at 786 MHz BS-A (796 MHz) BS-B (806 MHz) UE-A (837 MHz) UE-C (757 MHz) 857- 862 MHz 10 MHz UE Block C Interferer power at tuner input(measured during active part of LTE signal) 6 5 – 32KN 256Q 3/5 1/32 PP4 8MHz 30 dB 30 dB 30 dB 30 dB -15 dBm 7 – 32KE 256Q 2/3 1/128 PP7 8MHz 30 dB 30 dB 30 dB 30 dB -15 dBm 8 – 32KE 256Q 2/3 1/16 PP4 8MHz 30 dB 30 dB 30 dB 30 dB -15 dBm 9 – 32KE 256Q 3/4 1/32 PP6 8MHz 30 dB 30 dB 30 dB 30 dB -15 dBm 6 Note the power of the LTE BS and UE signal is defined as the RMS power during the active part of the signal. To assist setting the power level of the LTE BS_idle downlink signal, the RMS power measured by a power meter shall be set approximately 8.3 dB lower (e.g. -23.3dBm). Similarly for the LTE UE_1Mbs signal, the RMS power measured by a power meter shall be set approximately 9.7 dB lower (e.g. -24.7 dBm). >>7 of 27
Page 1 and 2: DIGITALEUROPE White paper: Standard
Page 3 and 4: All single PLP modes use HEM (High
Page 5: (C/N)0dB_table_44 = 0dB echo C/N fo
Page 9 and 10: Table 8 - Immunity to co-channel in
Page 11 and 12: 10- 2- MFN multipath performance 10
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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