Selecting modulation and coding scheme in the presence of interference

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; and

attempt 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, and

wherein 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; and

a transmit module configured to

select a first modulation scheme of the plurality of modulation schemes based on the capacities of the wireless channel, and

transmit 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, and

select 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, and

select 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, and

wherein 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; and

transmitting 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; and

selecting 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; and

selecting 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; and

selecting one of the one or more of the plurality of modulation schemes having a highest data rate as the first modulation scheme.