A base station (108, 110; 302) comprising: one or more processors; a radio communicatively coupled to the one or more processors, the radio including a filter (116, 118; 314) associated with at least one of a filter type (116, 118) and a roll-off; and a guardband determination module configured to be operated by the one or more processors to perform operations including: determining the roll-off of the filter of the base station or the filter type of the filter of the base station; determining a first guardband (128, 140) for a first frequency channel based at least in part on the roll-off of the filter of the base station or the filter type of the filter of the base station; receiving, from a mobile device (102, 104, 106), an indication of a roll-off of a filter of the mobile device or a type of the filter (112, 114) of the mobile device; and determining a second guardband (124, 134) for a second frequency channel based at least in part on the roll-off of the filter of the mobile device or the type of the filter of the mobile device; the base station further comprising a scheduler, wherein the guardband determination module is a component of the scheduler, and the scheduler is configured to be operated by the one or more processors to perform operations including: selecting a first subcarrier (130, 132, 142) for transmissions from the base station to the mobile device based at least in part on the determined first guardband for the first frequency channel; selecting a second subcarrier (126, 136, 138) for transmissions from the mobile device to the base station based at least in part on the determined second guardband for the second frequency channel; and instructing the mobile device to utilize the selected second subcarrier. one or more processors; a radio communicatively coupled to the one or more processors, the radio including a filter (116, 118; 314) associated with at least one of a filter type (116, 118) and a roll-off; and a guardband determination module configured to be operated by the one or more processors to perform operations including: determining the roll-off of the filter of the base station or the filter type of the filter of the base station; determining a first guardband (128, 140) for a first frequency channel based at least in part on the roll-off of the filter of the base station or the filter type of the filter of the base station; receiving, from a mobile device (102, 104, 106), an indication of a roll-off of a filter of the mobile device or a type of the filter (112, 114) of the mobile device; and determining a second guardband (124, 134) for a second frequency channel based at least in part on the roll-off of the filter of the mobile device or the type of the filter of the mobile device; the base station further comprising a scheduler, wherein the guardband determination module is a component of the scheduler, and the scheduler is configured to be operated by the one or more processors to perform operations including: selecting a first subcarrier (130, 132, 142) for transmissions from the base station to the mobile device based at least in part on the determined first guardband for the first frequency channel; selecting a second subcarrier (126, 136, 138) for transmissions from the mobile device to the base station based at least in part on the determined second guardband for the second frequency channel; and instructing the mobile device to utilize the selected second subcarrier. determining the roll-off of the filter of the base station or the filter type of the filter of the base station; determining a first guardband (128, 140) for a first frequency channel based at least in part on the roll-off of the filter of the base station or the filter type of the filter of the base station; receiving, from a mobile device (102, 104, 106), an indication of a roll-off of a filter of the mobile device or a type of the filter (112, 114) of the mobile device; and determining a second guardband (124, 134) for a second frequency channel based at least in part on the roll-off of the filter of the mobile device or the type of the filter of the mobile device; the base station further comprising a scheduler, wherein the guardband determination module is a component of the scheduler, and the scheduler is configured to be operated by the one or more processors to perform operations including: selecting a first subcarrier (130, 132, 142) for transmissions from the base station to the mobile device based at least in part on the determined first guardband for the first frequency channel; selecting a second subcarrier (126, 136, 138) for transmissions from the mobile device to the base station based at least in part on the determined second guardband for the second frequency channel; and instructing the mobile device to utilize the selected second subcarrier. selecting a first subcarrier (130, 132, 142) for transmissions from the base station to the mobile device based at least in part on the determined first guardband for the first frequency channel; selecting a second subcarrier (126, 136, 138) for transmissions from the mobile device to the base station based at least in part on the determined second guardband for the second frequency channel; and instructing the mobile device to utilize the selected second subcarrier.