6.6 Unwanted emissions

37.1043GPPMulti-Standard Radio (MSR) Base Station (BS) radio transmission and receptionNR, E-UTRA, UTRA and GSM/EDGERelease 17TS

Unwanted emissions consist of out-of-band emissions and spurious emissions [6]. Out of band emissions are unwanted emissions immediately outside the channel bandwidth resulting from the modulation process and non-linearity in the transmitter but excluding spurious emissions. Spurious emissions are emissions which are caused by unwanted transmitter effects such as harmonics emission, parasitic emission, intermodulation products and frequency conversion products, but exclude out of band emissions.

The out-of-band emissions requirement for the BS transmitter is specified in terms of an Operating band unwanted emissions requirement that defines limits for emissions in each supported downlink operating band plus the frequency ranges ΔfOBUE above and ΔfOBUE below each band. Emissions outside of this frequency range are limited by a spurious emissions requirement. The values of ΔfOBUE are defined in table 6.6-1.

Table 6.6-1: Maximum offset of OBUE outside the downlink operating band

Operating band characteristics


FDL_high – FDL_low ≤ 200 MHz


200 MHz < FDL_high – FDL_low ≤ 900 MHz


There is in addition a requirement for occupied bandwidth and an ACLR requirement applicable for some RATs.