Granted Patent B2

US 12,352,873 · App. 18/421,173 · Granted Jul 8, 2025

Inventors: Michael Mclaughlin (Dublin, IE); Jaroslaw Niewczas (Jozefow, PL); Igor Dotlic (Dublin, IE); Billy Verso (Maynooth, IE)

Assignee: DecaWave, Ltd.

G01S3/48G01S3/043H04B7/086

Abstract

Claims (71)

1. An ultra-wideband (UWB) device, comprising:

a receiver configured to:

receive, from a first antenna of a transmitting device, a selected first portion of a signal; and

receive, from a second antenna of the transmitting device, a second portion of the signal; and

a processor communicatively coupled to the receiver, the processor configured to:

calculate a first phase value as a function of a complex baseband impulse response of the selected first portion of the signal;

calculate a second phase value as a function of a complex baseband impulse response of the second portion of the signal;

calculate a path difference value, p, as a function of the first phase value and the second phase value; and

correct p as a function of a mutual coupling of the first antenna and the second antenna.

2. The UWB device of claim 1 , wherein the processor is further configured to:

calculate a first time of flight of the selected first portion of the signal;

calculate a second time of flight of the second portion of the signal; and

calculate a distance, r, between the receiver and a mid-point between the first antenna and the second antenna.

3. The UWB device of claim 2 , wherein the first antenna and the second antenna are separated by a distance, d.

4. The UWB device of claim 3 , wherein the processor is further configured to calculate a position of the transmitting device relative to the receiver as a function of d and p.

5. A non-transitory computer readable medium storing computer executable instructions, wherein, in response to executing the computer executable instructions, a processor is configured to:

calculate a first phase value as a function of a complex baseband impulse response of a selected first portion of a signal received from a first antenna of a transmitting device;

calculate a second phase value as a function of a complex baseband impulse response of a selected second portion of the signal received from a second antenna of the transmitting device;

calculate a path difference value, p, as a function of the first phase value and the second phase value; and

correct p as a function of a mutual coupling of the first antenna and the second antenna.

6. The non-transitory computer readable medium of claim 5 , wherein, in response to executing the computer executable instructions, the processor is further configured to:

calculate a first time of flight of the selected first portion of the signal;

calculate a second time of flight of the selected second portion of the signal; and

calculate a distance, r, between a receiver and a mid-point between the first antenna and the second antenna.

7. The non-transitory computer readable medium of claim 6 , wherein the first antenna and the second antenna are separated by a distance d.

8. The non-transitory computer readable medium of claim 7 , wherein, in response to executing the computer executable instructions, the processor is further configured to calculate a position of the transmitting device relative to the receiver as a function of d and p.

9. A location determination circuit, comprising:

a receiver configured to:

receive, from a first antenna of a transmitting device, a selected first portion of a signal; and

receive, from a second antenna of the transmitting device, a second portion of the signal; and

a processor communicatively coupled to the receiver, the processor configured to:

calculate a first phase value as a function of a complex baseband impulse response of the selected first portion of the signal;

calculate a second phase value as a function of a complex baseband impulse response of the second portion of the signal;

calculate a path difference value, p, as a function of the first phase value and the second phase value; and

correct p as a function of a mutual coupling of the first antenna and the second antenna.

10. The location determination circuit of claim 9 , wherein the processor is further configured to:

calculate a first time of flight of the selected first portion of the signal;

calculate a second time of flight of the second portion of the signal; and

calculate a distance, r, between the receiver and a mid-point between the first antenna and the second antenna.

11. The location determination circuit of claim 10 , wherein the first antenna and the second antenna are separated by a distance, d.

12. The location determination circuit of claim 11 , wherein the processor is further configured to calculate a position of the transmitting device relative to the receiver as a function of d and p.

13. A radio frequency (RF) receiver, comprising:

a receiver configured to:

receive, from a first antenna of a transmitting device, a selected first portion of a signal; and

receive, from a second antenna of the transmitting device, a second portion of the signal; and

a processor communicatively coupled to the receiver, the processor configured to:

calculate a first phase value as a function of a complex baseband impulse response of the selected first portion of the signal;

calculate a second phase value as a function of a complex baseband impulse response of the second portion of the signal;

calculate a path difference value, p, as a function of the first phase value and the second phase value; and

correct p as a function of a mutual coupling of the first antenna and the second antenna.

14. The RF receiver of claim 13 , wherein the processor is further configured to:

calculate a first time of flight of the selected first portion of the signal;

calculate a second time of flight of the second portion of the signal; and

calculate a distance, r, between the receiver and a mid-point between the first antenna and the second antenna.

15. The RF receiver of claim 14 , wherein the first antenna and the second antenna are separated by a distance, d.

16. The RF receiver of claim 15 , wherein the processor is further configured to calculate a position of the transmitting device relative to the receiver as a function of d and p.

17. A radio frequency (RF) communication system, comprising:

a receiver configured to:

receive, from a first antenna of a transmitting device, a selected first portion of a signal; and

receive, from a second antenna of the transmitting device, a second portion of the signal; and

a processor communicatively coupled to the receiver, the processor configured to:

calculate a first phase value as a function of a complex baseband impulse response of the selected first portion of the signal;

calculate a second phase value as a function of a complex baseband impulse response of the second portion of the signal;

calculate a path difference value, p, as a function of the first phase value and the second phase value; and

correct p as a function of a mutual coupling of the first antenna and the second antenna.

18. The RF communication system of claim 17 , wherein the processor is further configured to:

calculate a first time of flight of the selected first portion of the signal;

calculate a second time of flight of the second portion of the signal; and

calculate a distance, r, between the receiver and a mid-point between the first antenna and the second antenna.

19. The RF communication system of claim 18 , wherein the first antenna and the second antenna are separated by a distance, d.

20. The RF communication system of claim 19 , wherein the processor is further configured to calculate a position of the transmitting device relative to the receiver as a function of d and p.

Assignments (2)

Continuity (3)

References Cited (75)