2 + [5kHz, 0]. Furthermore, for NR carriers in FR2 operating bands with 60 kHz channel raster, the nominal channel spacing is defined dfs = (BW ch1 + BW ch2)/2 + [20kHz, 0] [9]. In the case that multiple numerologies are multiplexed over the same symbol, the mini- mum guard band on each side of the carrier is the guard band applied at the configured gNB channel bandwidth for the numerology that is transmitted/received immediately adja- cent to the guard band. Nevertheless, if multiple numerologies are multiplexed on the same symbol and the gNB channel bandwidth is wider than 50 MHz when operating in FR1, the guard band applied adjacent to 15 kHz SCS is the same as the guard band 382 Chapter 3 defined for 30 kHz SCS for the same channel bandwidth. If multiple numerologies are multiplexed on the same symbol and the gNB channel bandwidth is wider than 200 MHz when operating in FR2, the guard band applied adjacent to 60 kHz SCS is the same as the guard band defined for 120 kHz SCS for the same channel bandwidth. For each numerol- ogy, the starting point of its transmission bandwidth configuration on the common resource block (CRB) grid for a given channel bandwidth is indicated by an offset to ref- erence point A in the unit of the numerology while the indicated transmission bandwidth configuration must fulfill the minimum guard band requirements [9]. The channel raster defines a subset of RF reference frequencies that can be used to identify the uplink and downlink RF channel positions, where the RF reference frequency corre- sponding to an RF channel is mapped to a resource element on that carrier. A global fre- quency raster is further defined for all frequencies from 0 to 100 GHz and is used to define the set of RF reference frequencies FREF that are used for signaling the location of RF chan- nels and synchronization signal blocks. The granularity of the global frequency raster is defined as \F global. For each operating band, a subset of frequencies from the global fre- quency raster are applicable for that ban