Method and system for detecting bluetooth signals utilizing a wideband receiver
View Patent ↗Aspects of a method and system for detecting Bluetooth signals utilizing a wideband receiver are provided. In this regard, a frequency band may be scanned by receiving signals on each of a plurality of sub-bands for an amount of time, the energy received in each band may be compared to a threshold, and whether each sub-band comprises a Bluetooth transmission may be determined based on a FFT. Additionally, the FFT may enable determining on which Bluetooth channel a detected transmission occurred. A FFT may be performed when energy detected in a sub-band is higher than a threshold. The sub-bands may each be a WLAN channel. A type of a detected Bluetooth transmission may be determined based on a number of scans in which the transmission is detected. Each sub-band may be received for less than or equal to 68 μs divided by the number of sub-bands.
1. A method for wireless communication, the method comprising:
performing, by one or more circuits and/or processors in a wireless device:
scanning an ISM frequency band to receive signals on each of a plurality of sub-bands for a determined duration of time;
for each one of said plurality of sub-bands, comparing an energy of said received signals to a threshold;
determining, based on said comparison, whether to perform a Fast Fourier Transform (FFT) on said received signals for said each one of said plurality of sub-bands; and
in instances that said FFT is performed, detecting, based on results of said FFT, whether said received signals for said each one of said plurality of sub-bands comprise a Bluetooth transmission.
2. The method according to claim 1 , wherein each of said sub-bands is a wireless local area networking channel.
3. The method according to claim 1 , comprising:
scanning said each one of said plurality of sub-bands multiple times in sequence; and
determining whether a Bluetooth transmission comprises an ID packet based on a number of scans in said sequence in which said Bluetooth transmission is detected.
4. The method according to claim 1 , comprising determining a Bluetooth channel associated with a detected Bluetooth transmission based on results of said Fast Fourier Transform.
5. The method according to claim 1 , comprising performing said Fast Fourier Transform when said energy of said signals received in said one of said plurality of sub-bands is greater than said threshold.
6. The method according to claim 3 , wherein each of said scans of said plurality of sub-bands is completed in less than or equal to 8 microseconds.
7. The method according to claim 1 , comprising receiving said signals on each of said plurality of sub-bands for a first portion of a time interval and configuring said wireless device into a low or lower power mode for a remaining portion of said time interval.
8. The method according to claim 1 wherein said ISM frequency band comprises the 2.4 GHz ISM frequency band and a Bluetooth transceiver in said wireless device is controlled based on results of said detecting.
9. A machine-readable storage having stored thereon, a computer program having at least one code section for wireless communication, the at least one code section being executable by a machine for causing the machine to perform steps comprising:
scanning an ISM frequency band to receive signals on each of a plurality of sub-bands for a determined duration of time;
for each one of said plurality of sub-bands, comparing an energy of said received signals to a threshold;
determining, based on said comparison, whether to perform a Fast Fourier Transform (FFT) on said received signals for said each one of said plurality sub-bands; and
in instances that said FFT is performed, detecting, based on results of said FFT, whether said received signals for said each one of said plurality of sub-bands comprise a Bluetooth transmission.
10. The machine-readable storage according to claim 9 , wherein each of said sub-bands is a wireless local area networking channel.
11. The machine-readable storage according to claim 9 , wherein said at least one code section comprises code for:
scanning said each one of said plurality of sub-bands multiple times in sequence; and
determining whether a Bluetooth transmission comprises an ID packet based on a number of scans in said sequence in which said Bluetooth transmission is detected.
12. The machine-readable storage according to claim 9 , wherein said at least one code section comprises code for determining a Bluetooth channel associated with a detected Bluetooth transmission based on results of said Fast Fourier Transform.
13. The machine-readable storage according to claim 9 , wherein said at least one code section comprises code for performing said Fast Fourier Transform when said energy of said signals received in said one of said plurality of sub-bands is greater than said threshold.
14. The machine-readable storage according to claim 11 , wherein each of said scans of said plurality of sub-bands is completed in less than or equal to 8 microseconds.
15. The machine-readable storage according to claim 9 , wherein said at least one code section comprises code for receiving said signals on each of said plurality of sub-bands for a first portion of a time interval and configuring said wireless device into a low or lower power mode for a remaining portion of said time interval.
16. The machine-readable storage according to claim 9 , wherein said ISM frequency band comprises the 2.4 GHz ISM frequency band and a Bluetooth transceiver in said wireless device is controlled based on results of said detecting.
17. A system for wireless communication, the system comprising:
one or more circuits and/or processors for use in a wireless device, said one or more circuits and/or processors being operable to:
scan an ISM frequency band to receive signals on each of a plurality of sub-bands for a determined duration of time;
for each one of said plurality of sub-bands, compare an energy of said received signals to a threshold;
determine, based on said comparison, whether to perform a Fast Fourier Transform (FFT) on said received signals for said each one of said plurality of sub-bands; and
in instances that said FFT is performed, detecting, based on results of said FFT, whether said received signals for said each one of said plurality of sub-bands comprise a Bluetooth transmission.
18. The system according to claim 17 , wherein each of said sub-bands is a wireless local area networking channel.
19. The system according to claim 17 , wherein said one or more circuits and/or processors are operable to:
scan said each one of said plurality of sub-bands multiple times in sequence; and
determine whether a Bluetooth transmission comprises an ID packet based on a number of scans in said sequence in which said Bluetooth transmission is detected.
20. The system according to claim 17 , wherein said one or more circuits and/or processors are operable to determine a Bluetooth channel associated with a detected Bluetooth transmission based on results of said Fast Fourier Transform.
21. The system according to claim 17 , wherein said one or more circuits and/or processors are operable to perform said Fast Fourier Transform when said energy of said signals received in said one of said plurality of sub-bands is greater than said threshold.
22. The system according to claim 19 , wherein each of said scans of said plurality of sub-bands is completed in less than or equal to 8 microseconds.
23. The system according to claim 17 , wherein said one or more circuits and/or processors are operable to receive said signals on each of said plurality of sub-bands for a first portion of a time interval and configuring said wireless device into a low or lower power mode for a remaining portion of said time interval.
24. The system according to claim 17 , wherein said ISM frequency band comprises the 2.4 GHz ISM frequency band and a Bluetooth transceiver in said wireless device is controlled based on results of said detecting.