er is specified both in terms of ACLR and OBUE. The maximum offset of the OBUEs mask from the operating band edge is denoted as ^fobue. The OBUE defines all unwanted emissions in each supported downlink operating band plus the frequency ranges ^fobue above and Afobue below each band. The unwanted emissions outside of this frequency range are limited by a spurious emissions requirement. The values of ^fobue are defined in Table 5.10 for the NR operating bands [5]. The occupied bandwidth is the size of a frequency band below the lower and above the upper frequency edges, where the mean power emitted is equal to B/2 (in percent) of the total mean transmitted power. The value of B/2 is equal to 0.5%. The occupied bandwidth requirement is applicable during the transmitter ON period for a single carrier. There may also be regional requirements to declare the occupied bandwidth according to the above def- inition. The occupied bandwidth is a regulatory requirement that is specified for the equip- ment in some regions. It was originally defined by the ITU-R as the maximum bandwidth, outside of which emissions do not exceed a certain percentage of the total emissions. The occupied bandwidth for NR is equal to the channel bandwidth, outside of which a maximum of 1% of the emissions are allowed (0.5% on each side). The adjacent channel leakage ratio is the ratio of the filtered mean power centered on the assigned channel frequency to the filtered mean power centered on an adjacent channel fre- quency. The requirements apply outside the BS RF bandwidth or radio bandwidth regardless of the type of transmitter considered (single-carrier or multi-carrier) and for all transmission modes supported by the manufacturer's specification. These requirements are applied during the transmitter ON period. New Radio Access RF and Transceiver Design Considerations The spectrum of an OFDM signal decays slowly outside of the transmission bandwidth. Since the transmitted signal for NR occupies up to 98% of the channel bandwidth, it is not pos