the channel edge, and the UE may fail out of band emission requirements like ACLR and SEM. The inner allocations are in the middle of the channel and in such a way that most of the spectral regrowth is within the channel and thus might only fail in band emissions or error vector mag- nitude (EVM), which, for low modulation orders, have a relaxed linearity requirement compared to ACLR or SEM. This inner-outer concept also benefits from the fact that 3G/UTRA (WCDMA)-related ACLR requirements are not generic since bands where both 3G and 5G will be deployed are an exception, and only for these bands is additional MPR allowed to meet UTRA ACLRs. The allowed MPR for power class 2 (PC2: 26 dBm) is the same as for PC3 (23 dBm), with the exception that it introduces the concept of edge allocation in addition to inner Inner allocations Outer allocations Edge allocations XXXXXX Valid allocations for DFT-s-OFDM RB start (index of lowest allocated resource block) RB start Figure 12.12 Required power back-off for (left) all 5 MHz NR channel possible allocations, (right) inner and outer allocation for a 5 MHz 15 kHz SCS NR channel. 12.3 5G Standalone Performance Aspects in Frequency Range 1 and outer allocations. An edge allocation is located at the lowermost or uppermost edge of the channel with LCRB 2 RB's, in which case the allowed MPR is 3.5 dB. The reason for allowing more MPR for PC2 edge allocations is that these edge allocations are limited by the spectrum emission mask, which is at an absolute power level, and as PC2 has 3 dB more output power compared to PC3, it requires this additional relaxation, especially as in NR, because it has higher SU, these allocations are closer to the channel edge than for the LTE case. The 5G MPR for power class 2 and 3 operation is presented in Table 12.3. 12.3.4.2 Impact on Power Amplifier Power Consumption Compared to LTE, the advantage of the outer and inner MPR concept in 5G is that there are more allocations that benefit from a low MPR, as in LTE the MPR is deter- mined only based 