Frequency re-bander with UE and doppler correction
AssigneeCubic Corporation
InventorsAndrew John Fox, Matthew Parry
Life of this patent
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Abstract
Techniques are provided for providing Doppler correction. In particular, embodiments may provide re-banding circuitry having a reference clock, a mixer, and a compensation circuitry for re-banding and for Doppler correction. The compensation circuitry may be configured to adjust a reference frequency of the reference clock based on signals received from a Global Navigation Satellite System (GNSS) receiver. The mixer may be configured to translate communication signals in a first frequency band to a second frequency band based at least in part on the adjusted reference frequency of the reference clock.
Claims19
A frequency re-bander unit, comprising:
- an interface configured to communicate with a first communication system in a first frequency band, wherein:
- the first communication system includes a user equipment (UE), and the UE uses cellular standards-based communication;
- and
- re-banding circuitry comprising:
- a reference clock configured to produce a reference frequency;
- a Global Navigation Satellite System (GNSS) receiver configured to:
- receive a timing signal from a satellite positioning system different from the first communication system;
- compensation circuitry configured to:
- determine speed information of the first communication system, wherein the speed information is indicative of at least a speed of the first communication system;
- determine a Doppler correction based on the speed information of the first communication system;
- determine a maximum Doppler shift causable by the first communication system;
- and
- apply the Doppler correction corresponding to the maximum Doppler shift by adjusting the reference frequency of the reference clock based at least in part on the maximum Doppler shift until a connection is established between the first communication system and a second communication system;
- and
- a mixer configured to translate signals received from the first communication system to a second frequency band based at least in part on the adjusted reference frequency of the reference clock, wherein the mixer is further configured to cause the translated signals to be transmitted in the second frequency band to the second communication system different from the satellite positioning system.
A method for correcting Doppler shift using a re-bander unit, the method comprising:
- receiving, from a first communication system, a first signal in a first frequency band, wherein:
- the first communication system includes a user equipment (UE), and
- the UE communicates using cellular standards-based communication;
- receiving, from a satellite positioning system different from the first communication system, a timing signal;
- adjusting, based at least in part on the timing signal, a reference frequency of a reference clock of the re-bander unit;
- obtaining speed information of the first communication system, wherein the speed information is indicative of at least a speed of the first communication system;
- determining, based on the speed information, a Doppler correction;
- determining a maximum Doppler shift causable by the first communication system;
- applying the Doppler correction corresponding to the maximum Doppler shift by adjusting, based at least in part on the maximum Doppler correction shift until a connection is established between the first communication system and a second communication system, the reference frequency of the reference clock of the re-bander unit;
- translating, based on the adjusted reference frequency, the first signal in the first frequency band to a second signal in a second frequency band;
- and
- transmitting the second signal in the second frequency band to [[a]]the second communication system different from the satellite positioning system.
Dependencies are inferred from the claim text.