A method of wireless communication, comprising: obtaining, by a first wireless communication device, a configuration for communicating a communication signal in a frequency spectrum, wherein the configuration is based on at least a number of wireless communication devices scheduled to communicate in a time period and indicates resources in the frequency spectrum over the time period, wherein the resources include resources of mini-resource blocks, mini-RB's, wherein a mini-RB is formed from a subset of contiguous or distributed subcarriers within a resource block, and a frequency distribution mode of the resources, wherein the indicated resources includes a first subset of mini-RBs of a first RB, the first subset of mini-RBs being less than all mini-RBs of the first RB, wherein the frequency distribution mode of the resources indicates the mini-RBs of the first RB are formed from distributed subcarriers wherein the first subset of mini-RB is formed from a set of distributed subcarriers spaced apart from each by at least one other subcarrier; and a second subset of mini-resource blocks, mini-RBs, of a second RB, the second subset of mini-RBs being less than all mini-RBs of the second RB, wherein the frequency distribution mode of the resources indicates the mini-RBs of the second RB are formed from distributed subcarriers wherein the second subset of mini-RB is formed from a set of distributed subcarriers spaced apart from each by at least one other subcarrier; wherein the resources and the frequency distribution mode are determined, by the first wireless communication device, based on a parameter associated with a power spectral density, PSD, of the frequency spectrum; and communicating, by the first wireless communication device with a second wireless communication device, the communication signal in the frequency spectrum during the time period based on the configuration. obtaining, by a first wireless communication device, a configuration for communicating a communication signal in a frequency spectrum, wherein the configuration is based on at least a number of wireless communication devices scheduled to communicate in a time period and indicates resources in the frequency spectrum over the time period, wherein the resources include resources of mini-resource blocks, mini-RB's, wherein a mini-RB is formed from a subset of contiguous or distributed subcarriers within a resource block, and a frequency distribution mode of the resources, wherein the indicated resources includes a first subset of mini-RBs of a first RB, the first subset of mini-RBs being less than all mini-RBs of the first RB, wherein the frequency distribution mode of the resources indicates the mini-RBs of the first RB are formed from distributed subcarriers wherein the first subset of mini-RB is formed from a set of distributed subcarriers spaced apart from each by at least one other subcarrier; and a second subset of mini-resource blocks, mini-RBs, of a second RB, the second subset of mini-RBs being less than all mini-RBs of the second RB, wherein the frequency distribution mode of the resources indicates the mini-RBs of the second RB are formed from distributed subcarriers wherein the second subset of mini-RB is formed from a set of distributed subcarriers spaced apart from each by at least one other subcarrier; wherein the resources and the frequency distribution mode are determined, by the first wireless communication device, based on a parameter associated with a power spectral density, PSD, of the frequency spectrum; and communicating, by the first wireless communication device with a second wireless communication device, the communication signal in the frequency spectrum during the time period based on the configuration.