Adaptive frequency tracking mechanism for burst transmission reception

1. A method of tracking frequencies of transmitted burst signals, the method comprising:

receiving a burst signal;

determining a quality of the burst signal and a carrier frequency of the burst signal;

determining a carrier frequency of the burst signal including:

conditioning the burst signal;

determining two peak frequencies of the conditioned burst signal; and

when the two peak frequencies are separated by a predetermined amount and are within the drift window, the carrier frequency is determined to be derived from a point midway between the two peak frequencies;

demodulating the burst signal based upon the determined carrier frequency;

determining a frequency offset of the burst signal based on the determined carrier frequency; and

when the quality of the burst signal exceeds a threshold, calculating a drift window based on the determined frequency offset.

2. The method of claim 1 , wherein the burst signal is a complex time signal, and conditioning the burst signal comprises:

squaring the complex time signal at least one time; and

converting the complex time signal from a time domain to a frequency domain.

3. The method of claim 1 , further comprising:

determining a predetermined amount of time has elapsed before receiving the burst signal; and

when the predetermined amount of time has elapsed, setting carrier frequency scan ranges of the burst signal to their defaults.

4. The method of claim 1 , wherein the quality of the burst signal is determined before demodulation of the burst signal.

5. The method of claim 1 , wherein the quality of the burst signal is determined after demodulation of the burst signal.

6. The method of claim 1 , wherein when the determined carrier frequency of the burst signal is not within a carrier range, further comprising using a previously calculated carrier frequency resulting from a valid signal burst as the determined carrier frequency.

7. A method of tracking frequencies of transmitted burst signals the method comprising:

receiving a burst signal;

determining a carrier frequency of the burst signal by:

conditioning the burst signal;

determining two peak frequencies of the conditioned burst signal; and

when the two peak frequencies are separated by a predetermined amount and are within the drift window, the carrier frequency is determined to be derived from a point midway between the two peak frequencies;

demodulating the burst signal based upon the determined carrier frequency;

determining a frequency offset of the burst signal based on the determined carrier frequency; and

calculating a drift window based on the determined frequency offset.

8. The method of claim 7 , wherein the burst signal is a complex time signal, and conditioning the burst signal comprises:

squaring the complex time signal at least one time; and

converting the complex time signal from a time domain to a frequency domain.

9. The method of claim 7 , wherein determining the carrier frequency of the burst signal comprises:

conditioning the burst signal;

determining a peak frequency of the conditioned burst signal; and

when the peak frequency exceeds other frequencies by a predetermined amount, the peak frequency is determined to be a valid representation of the carrier frequency.

10. The method of claim 7 , further comprising:

determining a predetermined amount of time has elapsed before receiving the burst signal; and

when the predetermined amount of time has elapsed, setting carrier frequency scan ranges of the burst signal to their defaults.

11. A wireless communication device configured to track frequencies of transmitted burst signals, the wireless communication device comprising:

a transceiver configured to receive a burst signal; and

processing circuitry including a memory and a processor, the memory in communication with the processor, the memory having instructions that, when executed by the processor, configure the processor to:

determine a quality of the burst signal and a carrier frequency of the burst signal by:

conditioning the burst signal;

determining two peak frequencies of the conditioned burst signal; and

when the two peak frequencies are separated by a predetermined amount and are within the drift window, the carrier frequency is determined to be derived from a point midway between the two peak frequencies;

demodulate the burst signal based upon the determined carrier frequency;

determine a frequency offset of the burst signal based on the determined carrier frequency; and

when the quality of the burst signal exceeds a threshold, calculate a drift window based on the determined frequency offset.

12. The wireless communication device of claim 11 , wherein the burst signal is a complex time signal, and conditioning the burst signal comprises:

squaring the complex time signal at least one time; and

converting the complex time signal from a time domain to a frequency domain.

13. The wireless communication device of claim 11 , wherein the processor is further configured to:

determine a predetermined amount of time has elapsed before receiving the burst signal; and

when the predetermined amount of time has elapsed, set the carrier frequency of the burst signal to a default frequency.

14. The wireless communication device of claim 11 , wherein the quality of the burst signal is determined before demodulation of the burst signal.

15. The wireless communication device of claim 11 , wherein the quality of the burst signal is determined after demodulation of the burst signal.

16. The wireless communication device of claim 11 , wherein the burst signal is a complex time signal, and conditioning the burst signal comprises:

squaring the complex time signal at least one time; and

converting the complex time signal from a time domain to a frequency domain, wherein converting the complex time signal from a time domain to a frequency domain is performed by Fast Fourier Transform (FFT) and the quality of the burst signal is based on a quality of the FFT.

17. The wireless communication device of claim 11 , wherein when the determined carrier frequency of the burst signal is not within a carrier range, the processor is further configured to use a previously calculated carrier frequency resulting from a valid signal burst as the determined carrier frequency.