METHODS FOR ADJUSTING SYSTEM CLOCK IN TERMS OF OPERATIONAL STATUS OF NON-BASEBAND MODULE, METHODS FOR PERIPHERAL DEVICE CONTROL ADJUSTMENT, AND ELECTRONIC DEVICES USING THE SAME

• US 20110274221A1
• Filed: 12/03/2010
• Published: 11/10/2011
• Est. Priority Date: 05/06/2010
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Chin, Chieh-Chuan, Lai, Chien-Sheng, Yang, Ming-Jie, Tseng, Po-Sen
• Granted Patent: US 8,483,333 B2
• Time in Patent Office: Days
• US Class Current: 375/344
• CPC Class Codes: H04B 1/0475 with means for limiting noise, interference or distortion H04B1/0483 takes precedence
• CPC Class Codes: H04B 1/10 Means associated with receiver for limiting or suppressing noise or interference

Abstract

A method for adjusting a system clock in terms of an operational status of at least one non-baseband module includes: getting first information corresponding to the system clock required by at least one baseband module, wherein the first information comprises a frequency characteristic of the system clock; getting second information corresponding to the at least one non-baseband module, wherein the second information comprises a frequency characteristic of a radio frequency (RF) signal to be received by the non-baseband module; and selectively adjusting a frequency of the system clock by referring to the first information and the second information.

Claims

1. A method for adjusting a system clock in terms of an operational status of at least one non-baseband module, comprising:

getting first information corresponding to the system clock of at least one baseband module, wherein the first information comprises a frequency characteristic of the system clock;

getting second information corresponding to the at least one non-baseband module, wherein the second information comprises a frequency characteristic of a radio frequency (RF) signal to be received by the non-baseband module; and

selectively adjusting a frequency of the system clock by referring to the first information and the second information.

2. The method of claim 1, wherein the at least one non-baseband module comprises a RF receiver module, and the frequency characteristic of the RF signal to be received comprises a channel frequency;

the frequency characteristic of the system clock comprises a clock frequency; and

the second information further comprises a guard band corresponding to the RF signal.

3. The method of claim 1, wherein the step of selectively adjusting the frequency of the system clock comprises:

inspecting whether the RF signal to be received is interfered with by a harmonic of the system clock by referring to the first information and the second information, and generating an inspection result accordingly; and

selectively adjusting the frequency of the system clock by referring to the inspection result.

4. The method of claim 3, wherein the second information further comprises a first frequency of a first signal and a second frequency of a second signal, the first signal and the second signal corresponds to the RF signal to be received, the step of inspecting whether the RF signal to be received is interfered with by the harmonic of the system clock, further comprises:

determining priorities of the first signal and the second signal;

determining a first candidate system clock frequency and a second candidate system clock frequency for the system clock;

inspecting whether the first and second signals will be interfered with by a first harmonic of the system clock at the first candidate system clock frequency respectively; and

inspecting whether the first and second signals will be interfered with by a second harmonic of the system clock at the second candidate system clock frequency respectively, and

wherein the step of selectively adjusting the frequency of the system clock by referring to the inspection result comprises;

when the inspection result shows that the first signal will be less interfered with by the first harmonic of the system clock at the first candidate system clock frequency than by the second harmonic of the system clock at the second candidate system clock frequency, and the first signal has a higher priority than that of the second signal, adjusting the frequency of the system clock to the first candidate system clock frequency.

5. The method of claim 4, wherein the second frequency is higher than the first frequency.

6. The method of claim 5, wherein the first signal is the RF signal to be received via an RF channel, and the second signal is generated by a local oscillator.

7. The method of claim 3, wherein the second information further comprises a first RF signal at a first frequency to be received by a first non-baseband module, and a second RF signal at a second frequency to be received by a second non-baseband module, and the first and second non-baseband modules comply with different wireless communications standards, respectively, the step of inspecting whether the RF signal to be received is interfered with by the harmonic of the system clock, further comprises:

determining priorities of the first RF signal and the second RF signal;

determining a first candidate system clock frequency and a second candidate system clock frequency for the system clock;

inspecting whether the first and second RF signals will be interfered with by a first harmonic of the system clock at the first candidate system clock frequency respectively; and

inspecting whether the first and second signals will be interfered with by a second harmonic of the system clock at the second candidate system clock frequency respectively, and

wherein the step of selectively adjusting the frequency of the system clock by referring to the inspection result comprises;

when the inspection result shows that the first signal will be less interfered with by the first harmonic of the system clock at the first candidate system clock frequency than by the second harmonic of the system clock at the second candidate system clock frequency, and the first signal has a higher priority than that of the second signal, adjusting the frequency of the system clock to the first candidate system clock frequency.

8. The method of claim 7, wherein the first signal corresponds to a channel complying with a Global System for Mobile Communications (GSM) standard, the second signal corresponds to a channel complying with a wireless communications standard different from the GSM standard.

9. An electronic device for adjusting a system clock in terms of an operational status of at least one non-baseband module, comprising:

at least one baseband module, for receiving a system clock;

at least one non-baseband module; and

a control module, for getting first information corresponding to the system clock, getting second information corresponding to the at least one non-baseband module, and selectively adjusting a frequency of the system clock by referring to the first information and the second information;

wherein the first information comprises a frequency characteristic of the system clock, and the second information comprises a frequency characteristic of an radio frequency (RF) signal to be received by the non-baseband module.

10. The electronic device of claim 9, wherein the at least one non-baseband module comprises a RF receiver module, and the frequency characteristic of the RF signal to be received comprises a channel frequency;

the frequency characteristic of the system clock comprises a clock frequency; and

the second information further comprises a guard band corresponding to the RF signal.

11. The electronic device of claim 10, wherein the control module includes a clock generating/adjusting module and a processing unit, the processing unit inspects whether the RF signal to be received is interfered with by a harmonic of the system clock by referring to the first information and the second information, and generating an inspection result accordingly, and selectively controls the clock generating/adjusting module to adjust the frequency of the system clock by referring to the inspection result.

12. The electronic device of claim 11, wherein the second information further comprises a first frequency of a first signal and a second frequency of a second signal, the first signal and the second signal corresponds to the RF signal to be received, the processing unit further determines priorities of the first signal and the second signal, determines a first candidate system clock frequency and a second candidate system clock frequency, inspects whether the first and second signals will be interfered with by a first harmonic of the system clock at the first candidate system clock frequency respectively, inspects whether the first and second signals will be interfered with by a second harmonic of the system clock at the second candidate system clock frequency respectively, when the inspection result shows that the first signal will be less interfered with by the first harmonic of the system clock at the first candidate system clock frequency than by the second harmonic of the system clock at the second candidate system clock frequency, and the first signal has a higher priority than that of the second signal, the processing unit controls the clock generating/adjusting module adjust the frequency of the system clock to the first candidate system clock frequency.

13. The electronic device of claim 12, wherein the second frequency is higher than the first frequency.

14. The electronic of claim 13, wherein the first signal is the RF signal to be received via an RF channel, and the second signal is generated by a local oscillator.

15. The electronic device of claim 11, wherein the electronic device comprises a first non-baseband module and a second non-baseband module, the second information further comprises a first RF signal at a first frequency to be received by a first non-baseband module, and a second RF signal at a second frequency to be received by a second non-baseband module, and the first and second non-baseband modules comply with different wireless communications standards, respectively, and the processing unit further determines priorities of the first RF signal and the second RF signal, determines a first candidate system clock frequency and a second candidate system clock frequency for the system clock, inspects whether the first and second RF signals will be interfered with by a first harmonic of the system clock at the first candidate system clock frequency respectively, inspects whether the first and second signals will be interfered with by a second harmonic of the system clock at the second candidate system clock frequency respectively, and wherein, when the inspection result shows that the first signal will be less interfered with by the first harmonic of the system clock at the first candidate system clock frequency than by the second harmonic of the system clock at the second candidate system clock frequency, and the first signal has a higher priority than that of the second signal, the processing unit controls the clock generating/adjusting module to adjust the frequency of the system clock to the first candidate system clock frequency.

16. The electronic device of claim 15, wherein the first signal corresponds to a channel complying with a Global System for Mobile Communications (GSM) standard, the second signal corresponds to a channel complying with a wireless communications standard different from the GSM standard.

17. The electronic device of claim 9, wherein the at least one baseband module, the at least one non-baseband module, and the control module are integrated into a chip (System on Chip, SOC).

18. A method for peripheral device control adjustment, comprising:

selectively disabling a control to a peripheral device during a receiving timeslot;

wherein the receiving timeslot is used for receiving radio frequency (RF) signals.

19. The method of claim 18, wherein the step of selectively disabling the control to the peripheral device during the receiving timeslot, further comprises disabling the control to the peripheral device during every receiving timeslot.

20. The method of claim 18, wherein the step of selectively disabling the control to the peripheral device during the receiving timeslot, further comprises:

for the each receiving timeslots, getting first information corresponding to a frequency of a peripheral device control signal to the peripheral device during the receiving timeslot;

getting second information corresponding to a frequency of the RF signal to be received during the receiving timeslot;

inspecting whether the RF signal is interfered with by the peripheral device control signal according to the first and second information; and

disabling the control to the peripheral device during the receiving timeslot when inspecting that the RF signal is interfered with by the peripheral device control signal.

21. An electronic device for peripheral device control adjustment, comprising:

a peripheral device;

a radio frequency (RF) receiver module, for receiving RF signals during a receiving timeslot; and

a processing unit, for selectively disabling a control to the peripheral device during the receiving timeslot.

22. The electronic device of claim 21, wherein the processing unit disables the control to the peripheral device during every receiving timeslot.

23. The electronic device of claim 21, wherein the processing unit, for the receiving timeslot, gets first information corresponding to a frequency of a peripheral device control signal to the peripheral device during the receiving timeslot, gets second information corresponding to a frequency of the RF signal to be received during the receiving timeslot, inspects whether the RF signal is interfered with by the peripheral device control signal according to the first and second information, and disables the control to the peripheral device during the receiving timeslot when inspecting that the RF signal is interfered with by the peripheral device control signal.

24. The electronic device on claim 21, wherein the peripheral device, the RF receiver module, and the processing unit are integrated into a chip System on Chip (SOC).