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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

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.

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1. A system comprising: a sensing module configured to determine whether a signal sensed in a wireless channel is noise or is modulated by a remote device; andattempt to determine, in response to the signal being modulated, a modulation scheme of the signal;a capacity determination module configured

1. A system comprising: a sensing module configured to determine whether a signal sensed in a wireless channel is noise or is modulated by a remote device; andattempt to determine, in response to the signal being modulated, a modulation scheme of the signal;a capacity determination module configured to determine capacities of the wireless channel to transmit data using a plurality of modulation schemes,wherein in response to the sensing module being able to determine the modulation scheme of the signal, the plurality of modulation schemes includes the modulation scheme of the signal, andwherein in response to the sensing module being unable to determine the modulation scheme of the signal, the plurality of modulation schemes includes one or more modulation schemes that the remote device is configured to use to modulate the signal; anda transmit module configured to select a first modulation scheme of the plurality of modulation schemes based on the capacities of the wireless channel, andtransmit data over the wireless channel using the first modulation scheme. 2. The system of claim 1, wherein the first modulation scheme has a smallest one of the capacities. 3. The system of claim 1, wherein the first modulation scheme has one of the capacities that is greater than or equal to a predetermined threshold. 4. The system of claim 1, wherein the transmit module is configured to: determine whether one or more of the plurality of modulation schemes have capacities greater than or equal to a predetermined threshold, andselect one of the one or more of the plurality of modulation schemes having a highest data rate as the first modulation scheme. 5. The system of claim 1, further comprising: an averaging module configured to generate average capacities over a plurality of time slots or a plurality of frequency slots,wherein the transmit module is configured to select one of the plurality of modulation schemes having an average capacity greater than or equal to a predetermined threshold as the first modulation scheme. 6. The system of claim 1, further comprising: an averaging module configured to generate average capacities over a plurality of time slots or a plurality of frequency slots,wherein the transmit module is configured to determine whether one or more of the plurality of modulation schemes have average capacities greater than or equal to a predetermined threshold, andselect one of the one or more of the plurality of modulation schemes having a highest data rate as first modulation scheme. 7. A wireless device, comprising: the system of claim 1,wherein the wireless device is associated with a first base station,wherein the device transmitting the signal is a second base station,wherein the transmit module is configured to transmit the first modulation scheme to the first base station, andwherein the wireless device is configured to receive data transmitted from the first base station in accordance with the first modulation scheme. 8. A method comprising: determining whether a signal sensed in a wireless channel is noise or is modulated by a remote device;attempting to determine, in response to the signal being modulated, a modulation scheme of the signal;determining capacities of the wireless channel to transmit data using a plurality of modulation schemes, wherein in response to being able to determine the modulation scheme of the signal, the plurality of modulation schemes includes the modulation scheme of the signal, and wherein in response to being unable to determine the modulation scheme of the signal, the plurality of modulation schemes includes one or more modulation schemes that the remote device is configured to use to modulate the signal;selecting a first modulation scheme of the plurality of modulation schemes based on the capacities of the wireless channel; andtransmitting data over the wireless channel using the first modulation scheme. 9. The method of claim 8, wherein the first modulation scheme has a smallest one of the capacities. 10. The method of claim 8, wherein the first modulation scheme has one of the capacities that is greater than or equal to a predetermined threshold. 11. The method of claim 8, further comprising: determining whether one or more of the plurality of modulation schemes have capacities greater than or equal to a predetermined threshold; andselecting one of the one or more of the plurality of modulation schemes having a highest data rate as the first modulation scheme. 12. The method of claim 8, further comprising: generating average capacities over a plurality of time slots or a plurality of frequency slots; andselecting one of the plurality of modulation schemes having an average capacity greater than or equal to a predetermined threshold as the first modulation scheme. 13. The method of claim 8, further comprising: generating average capacities over a plurality of time slots or a plurality of frequency slots;determining whether one or more of the plurality of modulation schemes have average capacities greater than or equal to a predetermined threshold; andselecting one of the one or more of the plurality of modulation schemes having a highest data rate as the first modulation scheme.