Reducing cross-interference in a combined GPS receiver and communication system

• US 6,799,050 B1
• Filed: 06/04/2001
• Issued: 09/28/2004
• Est. Priority Date: 06/04/2001
• Status: Expired due to Term

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Inventors: Krasner, Norman F.
• Primary Examiner(s): Nguyen, Lee
• Assistant Examiner(s): Dao, Minh D.
• Application Number:
  US09/874,747
• Time in Patent Office: 1,212 Days
• Field of Search: 455/456.1, 455/456.6, 455/63.1, 455/552.1, 455/553.1, 455/550.1, 455/296, 342/357.06, 342/357.1, 342/357.12
• US Class Current: 455/456.1
• CPC Class Codes: G01S 19/21 Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
• CPC Class Codes: H04B 1/3805 with built-in auxiliary receivers
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Abstract

A method of operating a mobile device is disclosed. A first activity of the mobile device is detected. The following two operations are executed upon detection of the first activity: (i) wireless transmission of data over a wireless data link from a communication unit of the mobile device is disabled for a period of time, and (ii) a first control signal is transmitted from a communication unit to a satellite positioning system receiver of the mobile device, the first control signal enabling processing of signal positioning system signals received by the receiver during this period of time. The size of this period of time may be predetermined or adaptable.

Claims

1. A method of operating a mobile device, comprising:

detecting a first activity of the mobile device, wherein the first activity is due to an operation carried out by a user of the mobile device, wherein the operation is the absence of speech received by a microphone of the communication unit;

upon detection of the first activity;

(i) disabling wireless transmission of date over a wireless data link from a communication unit of the mobile device; and

(ii) transmitting a first control signal from the communication unit to a satellite positioning system receiver of the mobile device, the first control signal enabling the start of processing of satellite positioning system signals received by the receiver for a period, the data transmission remaining disabled even when a person speaks into a microphone of the mobile device, during said period.

2. The method of claim 1 wherein the operation is the depression of a button on the mobile device.

3. The method of claim 1 wherein the wireless transmission is alternately disabled and enabled.

4. The method of claim 3 wherein disabling and enabling of data transmission is time-based.

5. The method of claim 4 wherein disabling and enabling of data transmission is periodic.

6. The method of claim 1 wherein wireless transmission is alternately disabled and enabled.

7. The method of claim 1, further comprising:

(iii) enabling wireless transmission of data over the wireless data link from the communication unit after a sufficient amount of satellite positioning system data is received.

8. The method of claim 7, further comprising:

(iv) transmitting a second control signal from the communication unit to the satellite positioning system receiver when wireless transmission is enabled, the second control signal disabling processing of satellite positioning system signals received by the receiver.

9. The method of claim 8 wherein (i) and (ii) are periodically alternated with (iii) and (iv).

10. The mobile device of claim 1 wherein said period is predetermined.

11. The mobile device of claim 1 wherein said period is adaptable, with the end of said period being determined during said processing satellite positioning system signals.

12. A method of operating a mobile device, comprising:

detecting a first activity of the mobile device;

upon detection of the first activity;

(i) disabling wireless transmission of date over a wireless data link from a communication unit of the mobile device; and

transmitting a first control signal from the communication unit to a satellite positioning system receiver of the mobile device, the first control signal enabling the start of processing of satellite positioning system signals received by the receiver for a period the data transmission remaining disabled even when a person speaks into a microphone of the mobile device, during said period;

wherein wireless transmission of data is disabled due to a user of the mobile device speaking into a microphone of the communication unit.

13. A mobile device comprising:

a satellite positioning system antenna for receiving satellite positioning system signals from a plurality of satellite positioning system satellites;

a receiver circuit, coupled to the satellite processing system antenna, to process the satellite positioning system signals;

a detector of an activity of the mobile device;

a microphone to convert speech to voice data;

a wireless transmitter operable to transmit the voice data wirelessly over a wireless date link;

an output amplifier coupled to the wireless transmitter; and

a communication unit circuit operable to control the output amplifier to transmit a signal wirelessly from the wireless transmitter and, when the detector detects the activity;

(i) disable wireless transmission by the output amplifier; and

(ii) transmit a first control signal to the receiver circuit so that the receiver circuit begins the processing of satellite positioning system signals receiver by the satellite positioning system antenna during period of time, the output amplifier remaining disabled even when a person speaks into the microphone during said period of time;

wherein said period of time is adaptable, with the end of said period of time being determined during said processing of satellite positioning system signals.

14. The mobile device of claim 13 further comprising:

a button that can be depressed by the user, the operation being depression of the button.

15. The mobile device of claim 13 wherein wireless transmission is alternately disabled and enabled.

16. The mobile device of claim 13 wherein said period of time is predetermined.

17. A mobile device comprising:

a satellite positioning system antenna for receiving satellite positioning system signals from a plurality of satellite positioning system satellites;

a receiver circuit, coupled to the satellite processing system antenna to process the satellite positioning system signals;

a detector of an activity of the mobile device, wherein the activity is due to an operation carried out by a user of the mobile device, wherein the operation is the absence of speech received by the microphone;

a microphone to convert speech to voice data;

a wireless transmitter operable to transmit the voice data wirelessly over a wireless date link;

an output amplifier cooled to the wireless transmitter; and

a communication unit circuit operable to control the output amplifier to transmit a signal wirelessly from the wireless transmitter and, when the detector detects the activity;

(i) disable wireless transmission by the output amplifier; and

(ii) transmit a first control signal to the receiver circuit so that the receiver circuit begins the processing of satellite positioning system signals receiver by the satellite positioning system antenna during period of time, the output amplifier remaining disabled even when a person speaks into the microphone during said period of time.

18. A mobile device comprising:

a satellite positioning system antenna for receiving satellite positioning system signals from a plurality of satellite positioning system satellites;

a receiver circuit, coupled to the satellite processing system antenna, to process the satellite positioning system signals;

a detector of an activity of the mobile device, wherein the activity is due to an operation carried out by a user of the mobile device;

a microphone to convert speech to voice data;

a wireless transmitter operable to transmit the voice data wirelessly over a wireless date link;

an output amplifier coupled to the wireless transmitter; and

a communication unit circuit operable to control the output amplifier to transmit a signal wirelessly from the wireless transmitter and, when the detector detects the activity;

(i) disable wireless transmission by the output amplifier; and

(ii) transmit a first control signal to the receiver circuit so that the receiver circuit begins the processing of satellite positioning system signals receiver by the satellite positioning system antenna during period of time, the output amplifier remaining disabled even when a person speaks into the microphone during said period of time;

wherein wireless transmission of data is disabled while a user of the mobile device speaks into a microphone of the communication unit.