Page 656 - 5G Basics - Core Network Aspects

2 Transport aspects

  1  50  PSD _ N ( f i 10kHz  )  


PSD _W ( ) f 10 log 10     10  10  
 100  
 i ( 49 ) 
with:
PSD_N(f) the narrowband measurement at frequency f, expressed in dBm/Hz
PSD_W(f) the mathematically calculated wideband average PSD at frequency f, expressed in
dBm/Hz.
The TXPSDM_W is defined as the maximum of the notch mask (NM) and a lower limit as defined in
Table 6-1 frequency in question:

TxPSDM_W(f) = max[NM(f), lower limit(f)].

Table 6-1 – TXPSDM_W lower limit requirements

Frequency TXPSDM_W
MHz lower limit [dBm/Hz]

2.0-4.0 –100
4.0-5.0 –110
> 5.0 –112
For notches that are narrower than 1 MHz:

− the transmit PSD is only required to satisfy the narrowband transmit PSD mask TxPSDM_N, and
this for frequencies (SCstart×fSC + ½×MBW) < f < (SCstop×fSC − ½×MBW).

For notches that are 1 MHz or wider:
− the transmit PSD is required to satisfy the narrowband transmit PSD mask TxPSDM_N for
frequencies (SCstart×fSC + ½×MBW) < f < (SCstop×fSC − ½×MBW), and
− the wideband average transmit PSD (PSD_W(f)) is required to satisfy the wideband transmit PSD
mask TxPSDM_W for frequencies (SCstart×fSC + ½×MBW + 0.5MHz) < f < (SCstop×fSC − ½×MBW −
0.5MHz). The mask value to be compared against shall be the maximum value the mask takes
within the 1 MHz window [f – 0.5 MHz, f + 0.5 MHz].
Appendix II details the frequencies for the broadcast radio services (frequency modulation (FM) and digital
audio broadcasting (DAB)).
FM, DAB and other radio services will require different notch configurations depending on the
characteristics of the specific radio service.
NOTE 2 – NM may be used to notch individual broadcast stations depending on spectrum utilization.

6.6 Low frequency edge stop-band masking

For the low frequency edge stop-band mask (LESM), two PSD masks are defined:
− Narrowband transmit PSD mask (TXPSDM_N)
This mask is defined to verify the PSD using an MBW=10 kHz centred on the frequency in question.
The TXPSDM_N is defined as shown in Figure 6-1, where PSDtr3 is the value of the in-band LPM at
frequency ftr3. The mask values in the transition band are obtained using linear interpolation in dB
over a linear frequency scale.

The transmit PSD is required to satisfy the narrowband transmit PSD mask TxPSDM_N, for
frequencies (0.5 MHz + ½×MBW) < f < (ftr3 − ½×MBW), where ftr1 ≤ ftr3 ≤ 30 MHz. The PSD values above the
transition frequency ftr3 are considered as in-band and defined in clause 7.2.1.1.

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