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As an example, in GSM, tests related to blocking are performed with a desensitisation of 20 dB for the two first adjacent channels, and of 3 dB for the following channels. In UMTS and LTE, the following table applies.


Anchor
T068T069T068
T069
Table 6869: Desensitisation considered for testing ACS and blocking levels

 

1st adjacent
5 MHz block

Following adjacent
5 MHz blocks

Adjacent narrowband
interferer

UMTS BS

6 dB

6 dB

6 dB

LTE BS

6 dB

6 dB

6 dB

UMTS UE

14 dB

3 dB

10 dB

LTE UE

14 dB

6 to 9 dB[1]

13 to 16 dB6

 

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It can be noted that the desensitisation considered for testing varies with the frequency offset, while the network is designed for a specific value. In section 7.5.1 of 3GPP TS 25 101 [5] and TS 36 101 [1] related to the UE, the desensitisation value is explicitly mentioned as a testing parameter.

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