An apparatus for a wireless communication device (200; 200a), the apparatus comprising: a transceiver module for transmitting and receiving wireless transmissions; and a processing module configured to: control the transceiver module, communicate with a further wireless communication device via the transceiver module, wherein the communication with the further wireless communication device is based on a transmission of data frames between the wireless communication device and the further wireless communication device, wherein each data frame is based on a two-dimensional grid in a time-frequency plane having a time dimension resolution and a frequency dimension resolution, wherein each data frame is an Orthogonal Time-Frequency Space, OTFS, data frame, wherein the processing module is configured to select a communication mode from a plurality of communication modes for the communication between the wireless communication device and the further wireless communication device, wherein the communication mode defines a combination of a frequency dimension resolution and a time dimension resolution of the two-dimensional grid in the time-frequency plane, wherein the processing module is configured to initially select a default communication mode of the plurality of the plurality of communication modes for the communication between the wireless communication device and the further wireless communication device. a transceiver module for transmitting and receiving wireless transmissions; and a processing module configured to: control the transceiver module, communicate with a further wireless communication device via the transceiver module, wherein the communication with the further wireless communication device is based on a transmission of data frames between the wireless communication device and the further wireless communication device, wherein each data frame is based on a two-dimensional grid in a time-frequency plane having a time dimension resolution and a frequency dimension resolution, wherein each data frame is an Orthogonal Time-Frequency Space, OTFS, data frame, wherein the processing module is configured to select a communication mode from a plurality of communication modes for the communication between the wireless communication device and the further wireless communication device, wherein the communication mode defines a combination of a frequency dimension resolution and a time dimension resolution of the two-dimensional grid in the time-frequency plane, wherein the processing module is configured to initially select a default communication mode of the plurality of the plurality of communication modes for the communication between the wireless communication device and the further wireless communication device. control the transceiver module, communicate with a further wireless communication device via the transceiver module, wherein the communication with the further wireless communication device is based on a transmission of data frames between the wireless communication device and the further wireless communication device, wherein each data frame is based on a two-dimensional grid in a time-frequency plane having a time dimension resolution and a frequency dimension resolution, wherein each data frame is an Orthogonal Time-Frequency Space, OTFS, data frame, wherein the processing module is configured to select a communication mode from a plurality of communication modes for the communication between the wireless communication device and the further wireless communication device, wherein the communication mode defines a combination of a frequency dimension resolution and a time dimension resolution of the two-dimensional grid in the time-frequency plane, wherein the processing module is configured to initially select a default communication mode of the plurality of the plurality of communication modes for the communication between the wireless communication device and the further wireless communication device.