Method and device for maintaining the performance quality of a communication system in the presence of narrow band interference

A device, comprising:

• a radio frequency receiver;
• a filter having a variable bandwidth;
• and
• a circuit coupled to the filter, wherein execution of instructions by the circuit cause the circuit to perform operations comprising:
• scanning a wide frequency band;
• measuring power levels in frequency bands from signals provided by the radio frequency receiver;
• determining an average power level from less than all of the power levels measured in the frequency bands;
• determining a threshold from the average power level;
• detecting interference from the signals based on the threshold;
• and
• modifying the variable bandwidth of the filter to suppress at least a portion of the interference.

A memory device, comprising instructions, wherein responsive to a circuit executing the instructions, the circuit performs operations comprising:

• measuring power levels in frequency bands of signals provided over a wide frequency band;
• calculating an average power level from at least a portion of the power levels;
• determining a threshold from the average power level, a plurality of the power levels measured, or a combination thereof;
• detecting from the signals, interference based on the threshold;
• and
• modifying a variable bandwidth of a filter to suppress at least a portion of the interference.