A1.1 Reception modes 90 A1.2 Coverage definitions 92 A1.3 Calculation of signal levels 93 2 – Estimation of the net data capacity of a DVBT2 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 5 – DVBT2Lite 120 A5.1 Introduction 120
TABLE 2.1 Channel bandwidths for DVBT and DVBT2 DVBT DVBT2 – – 6 MHz 7 MHz 8 MHz – 1.7 MHz 5 MHz 6 MHz 7 MHz 8 MHz 10 MHz 2.2 FFT size for DVBT two FFT sizes, 2k and 8k, are specified, DVBT2 comprises 1k, 2k, 4k, 8k, 16k and 32k FFT sizes. Table 2.2 shows the available FFT sizes for the 8 MHz variant. TABLE 2.2 FFT size parameters for DVBT2/8 MHz (from [EN 302 755]) Parameter 1k mode 2k mode 4k mode 8k mode 16k mode 32k mode Number of carriers, Ktotal normal carrier mode 853 1705 3409 6817 13633 27265 extended carrier mode n/a n/a n/a 6913 13921 Value of carrier number, Kmin normal carrier mode 0 0 0 0 0 0 extended carrier mode n/a n/a n/a 0 0 0 Value of carrier number, Kmax normal carrier mode 852 1704 3408 6816 13632 27264 extended carrier mode n/a n/a n/a 6912 13920 Number of carriers added on each side in extended carrier mode, Kext (see Note 2) 0 0 0 48 144 288 Duration, TU (for T, see Table 2.3) 1024T 4096T 16384T 32768T Duration, TU µs (see Note 3) 112 224 448 896 1792 3584 Carrier spacing 1/TU (Hz) (see 1 and 2) 8929 4464 2232 1116 558 279 Spacing between carriers Kmin and Kmax normal carrier mode 7.61 MHz 7.61 MHz 7.61 MHz 7.61 MHz 7.61 MHz 7.61 MHz
System variant (example) 256QAM FEC 2/3, 32k, PP7 Extended 64QAM FEC 2/3, 32k, PP4 Extended 64QAM FEC 2/3, 16k, PP1 Extended 16QAM FEC 1/2, 8k, PP1 Extended 16QAM FEC 1/2, 16k, PP3 Extended 16QAM FEC 1/2, 8k, PP2 Extended Bit rate (indicative values) Mbit/s 35-40 26-29 23-28 11-14 12-15 11-14 Receiver noise figure F dB 6 6 6 6 6 6 Equivalent noise bandwidth B MHz 7.77 7.77 7.77 7.71 7.77 7.71 Receiver noise input power Pn dBW –129.1 –129.1 –129.1 –129.1 –129.1 –129.1 Min. receiver signal input power Ps min dBW –109.4 –111.3 –110.9 –119.1 –119.5 –119.1 Min. equivalent receiver input voltage, 75 Umin dBµV 29.4 27.5 27.9 19.6 19.3 19.6 Feeder loss Lf dB 4 0 0 0 0 0 Antenna gain relative to half dipole Gd dB 11 0 0 0 –9.5 –9.5 Effective antenna aperture Aa dBm2 –4.6 –15.6 –15.6 –15.6 –25.1 –25.1 Min power at receiving location θmin dB(W)/m2 –100.8 –95.7 –94.3 –103.5 –94.4 –94.0 Min equivalent field strength at receiving location Emin dBµV/m 45.0 50.1 50.5 42.3 51.4 51.8 Allowance for Pmmn dB 0 1 1 0 0 0 Penetration loss (building or vehicle) Lb, Lv dB 0 0 11 0 0 8 density made
3.4.5.3 Overload Similar measurements as for the adjacent channel case were performed for the case of overload. Table 3.9 gives the values for the base station case and Table 3.10 for the case of terminal interference. TABLE 3.9 Measured overload thresholds (dBm) for a DVBT2 signal (defined in Table 3.3) interfered with by an LTE BS signal in adjacent channels for silicon tuners (from Recommendation ITU-R BT.2033) Channel offset N 8 MHz channels Centre frequency offset (MHz) Number of receivers tested 0% BS traffic loading Oth (dBm) 50% BS traffic loading Oth (dBm) 100% BS traffic loading Oth (dBm) Percentile Percentile Percentile 10th 50th 10th 50th 10th 50th 1 10 11 –18 –6 –15 –6 –13 –8 2 18 11 –14 1 –12 –2 –13 –3 3 26 11 –12 3 –13 0 –12 –1 4 34 11 –11 5 –12 2 –12 0 5 42 11 –10 6 –12 3 –12 2 6 50 11 –10 4 –12 2 –12 2 7 58 11 –10 4 –11 2 –12 1 8 66 11 –10 4 –12 2 –12 1 9 74 11 –10 5 –12 3 –12 1 TABLE 3.10 Measured overload thresholds (dBm) for a DVBT2 signal (defined in Table 3.3) interfered with by an LTE UE signal in adjacent channels for silicon tuners (from Recommendation ITU-R BT.2033) Channel offset N 8 MHz channels) Centre frequency offset (MHz) Number of receivers tested 1 Mbit/s UE traffic loading 10 Mbit/s UE traffic loading 20 Mbit/s UE traffic loading Oth (dBm) Oth (dBm) Oth (dBm) 10th 50th 10th 50th 10th 50th 1 10 11 –37 –6 –15 –5 –12 –5 2 18 11 –12 5 –11 0 –11 0 3 26 11 –10 6 –11 2 –11 0 4 34 11 –24 5 –11 2 –11 1 5 42 11 –10 6 –11 2 –11 1 6 50 11 –10 6 –11 2 –11 2 7 58 11 –10 5 –11 2 –11 2