According to an example embodiment, a method may include determining, by a user equipment in a wireless network, a starting physical resource block (PoinA) of a common physical resource block grid that is associated with a wideband channel, wherein a plurality of bandwidth parts are provided within the common physical resource block grid, each bandwidth part having a bandwidth that is less than the bandwidth of the wideband channel; determining, by the user equipment, a wideband channel guard band for the wideband channel, the wideband channel guard band provided between a lowest frequency of the wideband channel and a first usable physical resource block of the common physical resource block grid; and, determining, by the user equipment for at least one bandwidth part (BWPI) of the plurality of bandwidth parts, a bandwidth part-specific physical resource block grid that is a subset of the common physical resource block grid.