A sensing module determines whether a signal sensed in a wireless channel is noise or is modulated by a remote device and attempts to determine, in response to the signal being modulated, a modulation scheme of the signal. A capacity determination module determines capacities of the wireless channel to transmit data using a plurality of modulation schemes. In response to the modulation scheme of the signal being determinable, the plurality of modulation schemes includes the modulation scheme of the signal. In response to the modulation scheme of the signal being indeterminable, the plurality of modulation schemes includes one or more modulation schemes that the remote device is configured to use to modulate the signal. A transmit module selects a first modulation scheme of the plurality of modulation schemes based on the capacities of the wireless channel and transmits data over the wireless channel using the first modulation scheme.