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A7.7.1
A7.7.1
As an example of a BS spectrum emission masks (i.e. CDMA DL as interferer), TS 25.104 ‎[1] have shown that different values may need to be considered depending on the BS maximum output power Table 64 65 presents Spectrum emission mask values, BS maximum output power P ³ 43 dBm.

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T065
T065
Table 65: Spectrum emission mask values, BS maximum output power P ³ 43 dBm (from ‎[1])


Frequency offset of measurement filter ‑3dB point, Df

Frequency offset of measurement filter centre frequency, f_offset

Minimum requirement Band I, II, III, IV, V, VII, VIII, X

Additional requirements Band II, IV, V, X

Measurement bandwidth

2.5 MHz <= Df < 2.7 MHz

2.515MHz <= f_offset < 2.715MHz

-14 dBm

-15 dBm

30 kHz

2.7 MHz <= Df < 3.5 MHz

2.715MHz <= f_offset < 3.515MHz

 Image Removed

Unit
body$-14dBm-15\cdot \left( \frac{f\_offset}{MHz}-2.715 \right)dB$

-15 dBm

30 kHz

(see note 3)

3.515MHz <= f_offset < 4.0MHz

-26 dBm

NA

30 kHz

3.5 MHz <= Df <= Dfmax

4.0MHz <= f_offset < f_offsetmax

-13 dBm

-13 dBm 4

1 MHz



Assuming a BS Tx power of 43 dBm, the equation of Table 65 gives the SEAMCAT input as presented in XXX and as illustrated in Figure 382.

Note that for this example, we add the limit from Recommendation ITU-R SM.329 for frequency offset above 12.5 MHz ‎[24].

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T066
T066
Table 66: Example of derivation of 3GPP spectrum emission mask into a SEAMCAT input format (with addition of the ITU-R Rec. SM.329 limit)


Frequency offset of measurement filter ‑3dB point, Df

Minimum requirement Band VIII

SEAMCAT (in ref/measurement bandwidth)

Measurement bandwidth

2.5 MHz <= Df < 2.7 MHz

-14 dBm

43 – (-14) = 57

30 kHz

2.7 MHz <= Df < 3.5 MHz

 Image Removed

Unit
body$-14dBm-15\cdot \left( \frac{f\_offset}{MHz}-2.715 \right)dB$
 

Linear

30 kHz

(see note 3)

-26 dBm

43 – (-26) = 69

30 kHz

3.5 MHz £ Df <= Dfmax

-13 dBm

43 – (-13) = 56

1 MHz

Above 12.5 MHz

(ITU-R SM.329)

-36 dBm

43 – (-36) = 79

100 kHz


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F382
F382
Figure 382: Illustration of the spectrum emission mask at the BS used in SEAMCAT and its derivation from the 3GPP specification and ITU-R SM.329 (for frequency offset larger than 12.5 MHz within the spurious emission domain in the frequency range 30 to 1000 MHz).

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