Frequency re-bander with UE and doppler correction

1. 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.

2. The frequency re-bander unit of claim 1 , wherein the GNSS receiver is further configured to receive a positioning signal from the satellite positioning system, and wherein the compensation circuitry is further configured to determine the speed information of the first communication system based at least in part on the positioning signal.

3. The frequency re-bander unit of claim 2 , wherein:

the speed information is further indicative of relative motion between the first communication system and the second communication system configured to receive the translated signals; and

the compensation circuitry is further configured to:

obtain a location of the second communication system; and

determine the relative motion between the first communication system and the second communication system based at least in part on the positioning signal and the location of the second communication system.

4. The frequency re-bander unit of claim 1 , wherein the compensation circuitry is further configured to determine the speed information of the first communication system based at least in part on speed information obtained from the first communication system or a moving platform on which the first communication system is located.

5. The frequency re-bander unit of claim 1 , wherein the compensation circuitry is further configured to determine the Doppler correction based at least in part on the maximum Doppler shift causable by the first communication system.

6. The frequency re-bander unit of claim 1 , wherein the compensation circuitry is further configured to determine and adjust the Doppler correction based at least in part on predetermined connection parameters indicative of data link quality or data link stability.

7. The frequency re-bander unit of claim 1 , wherein the compensation circuitry is further configured to adjust the reference frequency of the reference clock upon determining that the first communication system is moving at a speed equal to or exceeding a threshold speed.

8. The frequency re-bander unit of claim 1 , wherein the user equipment (UE) uses LTE and/or 5G cellular standards-based communication.

9. The frequency re-bander unit of claim 1 , wherein the second communication system includes a base station.

10. The frequency re-bander unit of claim 1 , wherein the reference clock comprises a voltage controller configured to adjust the reference frequency of the reference clock based at least in part on at least one of a strobe signal received from the GNSS receiver or the Doppler correction determined by the compensation circuitry.

11. 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.

12. The method of claim 11 , further comprising:

receiving, from the satellite positioning system, a positioning signal, wherein the speed information of the first communication system is obtained based at least in part on the positioning signal received from the satellite positioning system.

13. The method of claim 12 , wherein the speed information is further indicative of relative motion between the first communication system and the second communication system configured to receive the second signal, the method further comprising:

obtaining a location of the second communication system; and

determining the relative motion between the first communication system and the second communication system based at least in part on the positioning signal and the location of the second communication system.

14. The method of claim 11 , wherein the speed information of the first communication system is obtained from the first communication system or a moving platform on which the first communication system is located.

15. The method of claim 11 , further comprising:

determining at least one of data link quality or data link stability between the first communication system and the second communication system configured to receive the second signal, wherein adjusting the reference frequency of the reference clock comprises adjusting the reference frequency of the reference clock based on at least one of the data link stability or the data link stability.

16. The method of claim 11 , further comprising:

receiving, from the second communication system, a third signal in the second frequency band;

translating, based on the adjusted reference frequency, the third signal from the second communication system in the second frequency band to a fourth signal in the first frequency band; and

transmitting the fourth signal to the first communication system.

17. The method of claim 11 , further comprising:

receiving, from the second communication system, a third signal in a third frequency band, wherein the third frequency band is different from the second frequency band;

translating, based on the adjusted reference frequency, the third signal from the second communication system in the third frequency band to a fourth signal in a fourth frequency band, wherein the fourth frequency band is different from the first frequency band; and

transmitting the fourth signal to the first communication system.

18. The method of claim 11 , wherein the user equipment (UE) uses LTE and/or 5G cellular standards-based communication.

19. The method of claim 11 , wherein transmitting the second signal to the second communication system comprises transmitting the second signal to a base station.