System and method for training a programmable transceiver

• US 10,008,109 B2
• Filed: 12/06/2012
• Issued: 06/26/2018
• Est. Priority Date: 12/09/2011
• Status: Active Grant

• Current Assignee: Gentex Corporation
• Original Assignee: Gentex Corporation
• Inventors: Witkowski, Todd R., Bonev, Ivo Ivanov, Stoyanov, Plamen Chavdarov, Nikolov, Stefan Rumenov
• Primary Examiner(s): Lim, Steven
• Assistant Examiner(s): LITTLEJOHN JR, MANCIL H
• Application Number:
  US14/363,441
• Publication Number:
  US 20150009021A1
• Time in Patent Office: 2,028 Days
• Field of Search: 340 125, 340 1228, 340 122, 340 522, 340 526, 340 57, 34082569, 34082572, 455420, 455418, 455419, 455 99, 455344, 455345, 455 412, 307 101
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00857 where the code of the data carrier can be programmed
• CPC Class Codes: G08C 17/02 using a radio link

Abstract

A method for training a programmable transceiver is provided that includes scanning frequencies within a desired range for a first signal, and detecting the first signal at a first frequency. The method also includes computing harmonic frequencies and subharmonic frequencies of the first frequency, and scanning the harmonic frequencies and the subharmonic frequencies for a second signal at a second frequency. The method further includes comparing a first magnitude of the first signal to a second magnitude of the second signal. In addition, the method includes training the programmable transceiver based on the second signal if the second magnitude is greater than the first magnitude, otherwise training the programmable transceiver based on the first signal.

Claims

1. A method for training a programmable transceiver, comprising:

scanning frequencies, within a desired range for training the programmable transceiver, for a first signal broadcast by a transmitter;

detecting the first signal at a first frequency;

computing harmonic frequencies and subharmonic frequencies of the first frequency;

scanning the computed harmonic frequencies and the subharmonic frequencies of the first frequency for a second signal broadcast by the transmitter at a second frequency;

comparing a first magnitude of the first signal to a second magnitude of the second signal at one of the harmonic frequencies and the subharmonic frequencies of the first frequency;

selecting, as a training signal for training the programmable transceiver, one of the first signal at the first frequency if the first magnitude is greater than the second magnitude or the second signal at the second frequency if the second magnitude is greater than the first magnitude; and

training the programmable transceiver based on the training signal selected from one of the first signal or the second signal.

2. The method of claim 1, wherein scanning the harmonic frequencies comprises scanning only the harmonic frequencies within a first expected range, and scanning the subharmonic frequencies comprises scanning only the subharmonic frequencies within a second expected range.

3. The method of claim 1, wherein the desired range comprises about 285 MHz to about 440 MHz.

4. The method of claim 1, wherein the desired range comprises about 867 MHz to about 869 MHz, and about 900 MHz to about 930 MHz.

5. The method of claim 2, wherein the desired range comprises about 285 MHz to about 440 MHz, and the first expected range comprises about 867 MHz to about 869 MHz, and about 900 MHz to about 930 MHz.

6. The method of claim 2, wherein the desired range comprises about 867 MHz to about 869 MHz, and about 900 MHz to about 930 MHz, and the second expected range comprises about 285 MHz to about 440 MHz.

7. The method of claim 1, wherein training the programmable transceiver comprises applying a correction factor to the first magnitude, the second magnitude, or a combination thereof, to compensate for frequency dependent variations in sensitivity of the programmable transceiver.

8. The method of claim 1, wherein detecting the first signal at the first frequency comprises detecting a plurality of candidate signals, and selecting the candidate signal having a greatest magnitude as the first signal.

9. The method of claim 1, comprising:

comparing the first magnitude of the first signal to a threshold value; and

training the programmable transceiver based on the first signal if the first magnitude is greater than the threshold value.

10. The method of claim 1, wherein scanning frequencies within the desired range is initiated by depressing an unassigned button of the programmable transceiver.

11. A programmable transceiver, comprising:

a controller configured to;

scan frequencies, within a desired range for training the programmable receiver, for a first signal broadcast by a transmitter,

detect the first signal at a first frequency,

compute harmonic frequencies and subharmonic frequencies of the first frequency,

scan the computed harmonic frequencies and the subharmonic frequencies of the first frequency for a second signal broadcast by the transmitter at a second frequency,

compare a first magnitude of the first signal to a second magnitude of the second signal at one of the harmonic frequencies and the subharmonic frequencies of the first frequency,

select, as a training signal for training the programmable transceiver, one of the first signal at the first frequency when the first magnitude is greater than the second magnitude or the second signal at the second frequency when the second magnitude is greater than the first magnitude; and

train the programmable transceiver based on the training signal selected from one of the first signal or the second signal.

12. The programmable transceiver of claim 11, wherein the controller is configured to scan only the harmonic frequencies within a first expected range, and to scan only the subharmonic frequencies within a second expected range.

13. The programmable transceiver of claim 12, wherein the desired range comprises about 285 MHz to about 440 MHz, and the first expected range comprises about 867 MHz to about 869 MHz, and about 900 MHz to about 930 MHz.

14. The programmable transceiver of claim 12, wherein the desired range comprises about 867 MHz to about 869 MHz, and about 900 MHz to about 930 MHz, and the second expected range comprises about 285 MHz to about 440 MHz.

15. The programmable transceiver of claim 11, comprising a plurality of buttons, wherein depressing an unassigned button instructs the controller to scan frequencies within the desired range.

16. A programmable transceiver, comprising:

a transceiver configured to receive a training signal from a training transmitter;

a memory configured to store information associated with the training signal; and

a controller configured to;

instruct the transceiver to scan frequencies, within a desired range for training the programmable transceiver, for a first signal broadcast by a transmitter, to detect the first signal at a first frequency,

compute harmonic frequencies and subharmonic frequencies of the first frequency,

instruct the transceiver to scan the harmonic frequencies and the subharmonic frequencies of the first frequency for a second signal broadcast by the transmitter at a second frequency,

compare a first magnitude of the first signal to a second magnitude of the second signal at one of the harmonic frequencies and the subharmonic frequencies of the first frequency,

establish the training signal for training the programmable transceiver based on the second signal if the second magnitude is greater than the first magnitude, and to otherwise establish the training signal based on the first signal, and

store the information associated with the training signal established based on one of the first signal or the second signal in the memory.

17. The programmable transceiver of claim 16, wherein the controller is configured to instruct the transceiver to scan only the harmonic frequencies within a first expected range, and to scan only the subharmonic frequencies within a second expected range.

18. The programmable transceiver of claim 16, comprising a plurality of buttons, wherein depressing an unassigned button instructs the controller to initiate the frequency scan.

19. The programmable transceiver of claim 18, wherein the controller is configured to assign the information associated with the training signal to the unassigned button.

20. The programmable transceiver of claim 19, wherein depressing an assigned button instructs the transceiver to transmit the information associated with the training signal.