Standardized DVB-T2 RF specifications - DigitalEurope

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).
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