Wireless receiver with tracking using location, heading, and motion sensors and adaptive power detection

• US 10,323,943 B2
• Filed: 08/01/2016
• Issued: 06/18/2019
• Est. Priority Date: 08/01/2016
• Status: Active Grant

• Current Assignee: Movandi Corporation
• Original Assignee: Movandi Corporation
• Inventors: Gharavi, Sam, Shirinfar, Farid, Yoon, Seunghwan, Besoli, Alfred Grau, Rofougaran, Maryam, Rofougaran, Ahmadreza
• Primary Examiner(s): Nguyen, Chuong P
• Application Number:
  US15/225,523
• Publication Number:
  US 20180045518A1
• Time in Patent Office: 1,051 Days
• Field of Search: 34235728, 3423573, 34235732
• CPC Class Codes: G01C 21/1654 with electromagnetic compass
• CPC Class Codes: G01S 19/47 the supplementary measurement being an inertial measurement, e.g. tightly coupled inertial
• CPC Class Codes: G01S 3/043 Receivers
• CPC Class Codes: G01S 3/28 using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics
• CPC Class Codes: G01S 3/40 adjusting orientation of a single directivity characteristic to produce maximum or minimum signal, e.g. rotatable loop antenna or equivalent goniometer system
• CPC Class Codes: G01S 3/42 the desired condition being maintained automatically
• CPC Class Codes: G01S 3/48 the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured
• CPC Class Codes: G01S 5/0027 of actual mobile position, i.e. position determined on mobile
• CPC Class Codes: H04B 7/0857 using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
• CPC Class Codes: H04B 7/086 using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity

Abstract

A wireless receiver includes an antenna panel providing input to an H-combined/V-combined generation block, a hybrid tracking system receiving input from the H-combined/V-combined generation block, the hybrid tracking system comprising location, heading and motion (LOHMO) sensors for providing a general position input to a digital core, the hybrid tracking system further comprising first and second power detectors for measuring power received from the antenna panel and for providing a precise position input to the digital core, the hybrid tracking system providing phase feedback signals to the H-combined/V-combined generation block. At least one of the phase feedback signals is provided to at least one phase shifter in the H-combined/V-combined generation block to cause a phase shift in at least one linearly polarized signal received from at least one antenna in the antenna panel.

Claims

1. A method for use in a wireless receiver, said method comprising:

acquiring, by a digital core, a general position input from location, heading and motion (LOHMO) sensors during a coarse acquisition state;

acquiring, by said digital core, a precise position input from power detectors during a fine acquisition state;

entering, by said wireless receiver, said coarse acquisition state when said digital core determines that a power received from said antenna panel falls below a threshold power.

2. The method of claim 1 wherein said LOHMO sensors further comprise a global positioning system (GPS).

3. The method of claim 1 wherein each antenna in said antenna panel provides a horizontally-polarized signal and a vertically-polarized signal to an H-combined/V-combined generation block.

4. The method of claim 1 wherein each horizontally-polarized signal and vertically-polarized signal provided by said antenna panel is coupled to a phase shifter in an H-combined/V-combined generation block.

5. The method of claim 1 further comprising providing phase feedback signals to an H-combined/V-combined generation block so as to cause a phase shift in at least one linearly polarized signal received from at least one antenna in said antenna panel.

6. The method of claim 1 further comprising providing phase feedback signals to an H-combined/V-combined generation block so as to cause a respective phase shift in each linearly polarized signal received from each antenna in said antenna panel.

7. The method of claim 1 further comprising providing at least one phase feedback signal to at least one phase shifter in an H-combined/V-combined generation block.

8. The method of claim 1 further comprising providing each of phase feedback signals to a corresponding phase shifter in an H-combined/V-combined generation block.

9. The method of claim 1 wherein said wireless receiver is mounted on a vehicle causing a change in said general position or in said precise position of said antenna panel.

10. The method of claim 1 wherein each of said power detectors measures power of a circularly polarized signal.