METHOD OF DETECTING MULTIPATH STATE OF GLOBAL NAVIGATION SATELLITE SYSTEM SIGNAL AND ELECTRONIC DEVICE SUPPORTING THE SAME

• US 20200132855A1
• Filed: 10/28/2019
• Published: 04/30/2020
• Est. Priority Date: 10/26/2018
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Kihyuk, Park, Jeongmin
• Granted Patent: US 11,409,004 B2
• Time in Patent Office: Days
• CPC Class Codes: G01S 19/22 Multipath-related issues
• CPC Class Codes: G01S 19/32 Multimode operation in a single same satellite system, e.g. GPS L1/L2
• CPC Class Codes: G01S 19/46 the supplementary measurement being of a radio-wave signal type
• CPC Class Codes: G01S 19/48 by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
• CPC Class Codes: G01S 5/011 Identifying the radio environment

Abstract

An electronic device includes a global navigation satellite system (GNSS) reception circuit configured to receive a first signal having a first frequency and a second signal having a second frequency; a wireless communication circuit configured to support cellular communication or short-range communication; a processor operably connected to the GNSS reception circuit and the wireless communication circuit; and a memory operably connected to the processor, wherein the memory stores instructions that enable the processor to perform operations when the instructions are executed, the operations including receiving the first signal using the GNSS reception circuit; receiving the second signal using the GNSS reception circuit; receiving at least one third signal using the wireless communication circuit; determining existence of a multi-path state, based at least on the first signal and the second signal; and selecting at least one of the first signal, the second signal, or the third signal in order to determine a location of the electronic device, based at least on the determination.

Claims

1. An electronic device comprising:

a global navigation satellite system (GNSS) reception circuit configured to receive a first signal having a first frequency and a second signal having a second frequency;

a wireless communication circuit configured to support cellular communication or short-range communication;

a processor operably connected to the GNSS reception circuit and the wireless communication circuit; and

a memory operably connected to the processor,

wherein the memory stores instructions that enable the processor to perform operations when the instructions are executed, the operations comprising;

receiving the first signal using the GNSS reception circuit;

receiving the second signal using the GNSS reception circuit;

receiving at least one third signal using the wireless communication circuit;

determining existence of a multi-path state, based at least on the first signal and the second signal; and

selecting at least one of the first signal, the second signal, or the third signal in order to determine a location of the electronic device, based at least on the determination.

2. The electronic device of claim 1, wherein the first signal and the second signal are received from the same satellite via different frequency bands;

and

a chip rate of the first signal and a chip rate of the second signal are different from each other.

3. The electronic device of claim 1, wherein each of the first signal and the second signal comprises an original signal transmitted from a GNSS device and a reflected signal which corresponds to a reflection of the transmitted signal.

4. The electronic device of claim 3, wherein the instructions further enable the processor to perform:

obtaining a vector of the first signal and a vector of the second signal over time, based on the original signal and the reflected signal; and

determining multi-path states of the first signal and the second signal, based on a distribution of the vector of the first signal and a distribution of the vector of the second signal shown over time.

5. The electronic device of claim 4, wherein the instructions further enable the processor to perform:

determining that the first signal and the second signal are in the multi-path state if a waveform of the vector of the first signal comprises a peak point and a point at which at least one slope varies, and a waveform of the vector of the second signal comprises a plurality of different peak points.

6. The electronic device of claim 4, wherein the instructions further enable the processor to perform:

determining that the first signal and the second signal are in the multi-path state if a waveform of the vector of the second signal comprises a plurality of different peak points within a predetermined period of time.

7. The electronic device of claim 4, wherein the instructions further enable the processor to perform:

determining whether the first signal and the second signal are in the multi-path state, based at least on time intervals between the original signal and the reflected signal.

8. The electronic device of claim 1, wherein the instructions further enable the processor to perform:

selecting the first signal if it is determined that the first signal and the second signal are not in the multi-path state; and

selecting the first signal and the second signal, or selecting at least one third signal if it is determined that the first signal and the second signal are in the multi-path state.

9. The electronic device of claim 1, wherein the instructions further enable the processor to perform:

determining a reception environment where the first signal and the second signal are received, based at least on the multi-path state.

10. The electronic device of claim 8, wherein the instructions further enable the processor to perform:

storing information associated with the determined reception environment in the memory, or storing the same in an external server using the wireless communication circuit.

11. A method comprising:

receiving a first signal using a global navigation satellite system (GNSS) reception circuit configured to receive the first signal having a first frequency and a second signal having a second frequency;

receiving the second signal using the GNSS reception circuit;

receiving at least one third signal using a wireless communication circuit configured to support cellular communication or short-range communication;

determining existence of a multi-path state, based at least on the first signal and the second signal; and

selecting at least one of the first signal, the second signal, or the third signal in order to determine a location of the electronic device, based at least on the determination.

12. The method of claim 11, wherein the first signal and the second signal are received from the same satellite via different frequency bands, and a chip rate of the first signal and a chip rate of the second signal are different from each other.

13. The method of claim 11, wherein each of the first signal and the second signal comprises an original signal transmitted from a GNSS device and a reflected signal corresponding to a reflection of the transmitted signal.

14. The method of claim 13, wherein determining the existence of the multi-path state comprises:

obtaining a vector of the first signal and a vector of the second signal over time, based on the original signal and the reflected signal; and

determining multi-path states of the first signal and the second signal, based on a distribution of the vector of the first signal and a distribution of the vector of the second signal shown over time.

15. The method of claim 14, wherein determining the multi-path state of at least one of the first signal and the second signal further comprises:

determining that the first signal and the second signal are in the multi-path state if a waveform of the vector of the first signal comprises a peak point and a point at which at least one slope varies, and a waveform of the vector of the second signal comprises a plurality of different peak points.

16. The method of claim 11, further comprising:

determining a reception environment where the first signal and the second signal are received, based at least on the multi-path state.

17. An electronic device, comprising:

a global navigation satellite system (GNSS) reception circuit configured to receive a first signal having a first frequency and a second signal having a second frequency;

a processor operably connected to the GNSS reception circuit; and

a memory operably connected to the processor,

wherein the memory stores instructions which enable the processor to perform operations when the instructions are executed, the operations comprising;

receiving the first signal using the GNSS reception circuit;

receiving the second signal using the GNSS reception circuit;

determining existence of a multi-path state, based at least on the first signal and the second signal; and

determining a reception environment where the first signal and the second signal are received, based at least on the determination.

18. The electronic device of claim 17, further comprising a wireless communication circuit configured to support cellular communication or short-range communication, and storing the instructions which further enable the processor to perform:

receiving at least one third signal using the wireless communication circuit; and

selecting a scheme of determining a location of the electronic device using at least one of the first signal or the second signal, or a scheme of determining a location of the electronic device using the third signal, based at least on the determination of the existence of the multi-path state.

19. The electronic device of claim 17, wherein the first signal and the second signal are received from the same satellite via different frequency bands, and a chip rate of the first signal and a chip rate of the second signal are different from each other.

20. The electronic device of claim 17, wherein each of the first signal and the second signal comprises an original signal transmitted by a GNSS device, and a reflected signal corresponding to a reflection of the transmitted signal.