CLOSED-LOOP POWER CONTROL IN MULTI-TRANSMISSION WIRELESS SYSTEMS

• US 20170094608A1
• Filed: 09/25/2015
• Published: 03/30/2017
• Est. Priority Date: 09/25/2015
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Langer, Andreas, Bruder, Thomas
• Granted Patent: US 10,015,749 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/0057 using diplexing or multiplexing filters for selecting the desired band
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading

Abstract

Techniques for closed loop power control in multi-transmission systems are discussed. One example system employing such techniques can include coupling circuitry configured to receive a transmission path signal comprising a plurality of signal components, wherein the plurality of signal components comprises at least a first signal component in a first frequency band and a second frequency component in a second frequency band distinct from the first frequency band; filter circuitry configured to receive the transmission path signal from the coupling circuitry, to separate the first signal component from the second signal component, and to separately output the first signal component and the second signal component; and power control circuitry configured to receive the first signal component and the second signal component, and to generate a first power control signal based on the first signal component and a second power control signal based on the second signal component.

Claims

1. A system configured for use in a transmitter, comprising:

coupling circuitry configured to receive a transmission path signal comprising a plurality of signal components, wherein the plurality of signal components comprises at least a first signal component in a first frequency band and a second frequency component in a second frequency band distinct from the first frequency band;

filter circuitry configured to receive the transmission path signal from the coupling circuitry, to separate the first signal component from the second signal component, and to separately output the first signal component and the second signal component; and

power control circuitry configured to receive the first signal component and the second signal component, and to generate a first power control signal based on the first signal component and a second power control signal based on the second signal component.

2. The system of claim 1, wherein the filter circuitry comprises a first set of one or more filters that transmit the first frequency component and filter out the second frequency component to output the first signal component on a first path, and a second set of one or more filters that transmit the second frequency component and filter out the first frequency component to output the second signal component on a second path.

3. The system of claim 2, wherein the first frequency band has a lower frequency than the second frequency band, and wherein the first set of one or more filters comprises at least one of a lowpass filter or a bandpass filter.

4. The system of claim 2, wherein the first frequency band has a lower frequency than the second frequency band, and wherein the second set of one or more filters comprises at least one of a highpass filter or a bandpass filter.

5. The system of claim 2, wherein at least one filter of the first set of one or more filters or at least one filter of the second set of one or more filters comprises a tunable filter.

6. The system of claim 2, wherein the filtering circuitry comprises a plurality of filters switchably connected to the coupling circuitry, and wherein the filtering component is configured to select the first set of one or more filters and the second set of one or more filters from the plurality of filters to connect to the coupling circuitry based on the first frequency band and the second frequency band.

7. The system of claim 1, wherein the filtering circuitry comprises a plurality of frequency multiplexers configured to separate the first signal component from the second signal component for associated values of the first frequency band and the second frequency band, wherein each of the plurality of frequency multiplexers is switchably connected to the coupling circuitry, and wherein the filtering component is configured to select a single frequency multiplexer of the plurality of frequency multiplexers to connect to the coupling circuitry based on the first frequency band and the second frequency band.

8. The system of claim 7, wherein each of the plurality of frequency multiplexers is switchably connected to the coupling circuitry via a distinct coupler of a plurality of couplers of the coupling circuitry.

9. The system of claim 1, wherein the transmission path signal comprises a forward signal.

10. The system of claim 1, wherein the transmission path signal comprises a reverse signal.

11. The system of claim 1, wherein the plurality of signal components further comprises at least a third signal component in a third frequency band distinct from the first frequency band and the second frequency band, wherein the filter circuitry is further configured to separate the third signal component from the first signal component and the second signal component and to separately output the third signal component, and wherein the power control circuitry is further configured to receive the third signal component and to generate a third power control signal based on the third signal component.

12. The system of claim 11, wherein the plurality of signal components further comprises at least a fourth signal component in a fourth frequency band distinct from the first frequency band, the second frequency band and the third frequency band, wherein the filter circuitry is further configured to separate the fourth signal component from the first signal component, the second signal component, and the third signal component and to separately output the fourth signal component, and wherein the power control circuitry is further configured to receive the fourth signal component and to generate a fourth power control signal based on the fourth signal component.

13. The system of claim 1, wherein the transmission path signal is an inter-band uplink (UL) carrier aggregation (CA) signal.

14. The system of claim 1, wherein the first signal component and the second signal component are associated with distinct radio access technologies (RATs).

15. A non-transitory machine-readable medium comprising instructions that, when executed, cause a machine to:

receive a transmission path signal comprising a plurality of signal components, each of which is associated with a distinct frequency band of a plurality of frequency bands;

filter the transmission path signal to separate the plurality of signal components;

generate a plurality of power control signals, wherein each power control signal is based on a distinct signal component of the plurality of signal components; and

adjust the power of one or more signal components of the plurality of signal components, wherein the power of each of the one or more signal components is adjusted based at least in part on the associated power control signal.

16. The non-transitory machine-readable medium of claim 15, wherein causing the machine to filter the transmission path signal comprises causing the machine to select, for each of the plurality of signal components, a filter associated with that signal component from among a plurality of filters, wherein the selected filter transmits that signal component and filters out each other signal component of the plurality of signal components.

17. The non-transitory machine-readable medium of claim 16, wherein at least one filter of the plurality of filters is a tunable filter.

18. The non-transitory machine-readable medium of claim 16, wherein at least one filter of the plurality of filters is a bandpass filter, a highpass filter, or a lowpass filter.

19. The non-transitory machine-readable medium of claim 15, wherein causing the machine to filter the transmission path signal comprises causing the machine to select a frequency multiplexer from among a plurality of frequency multiplexers based on the plurality of frequency bands, wherein the selected frequency multiplexer separates the plurality of signal components.

20. The non-transitory machine-readable medium of claim 19, wherein causing the machine to receive the transmission path signal comprises causing the machine to receive the transmission path signal via at least one coupler switchably connected to the plurality of frequency multiplexers.

21. The non-transitory machine-readable medium of claim 20, wherein the at least one coupler comprises a plurality of couplers, each of which is switchably connected to a distinct frequency multiplexer of the plurality of frequency multiplexers.

22. The non-transitory machine-readable medium of claim 15, wherein the plurality of signal components comprises more than two signal components.

23. A system configured for use in a transmitter, comprising:

transmitter circuitry configured to receive a first data signal and a second data signal and to generate a combined transmission path signal that comprises a first signal component in a first frequency band based on the first data signal and a second signal component in a distinct second frequency band based on the second data signal;

coupling circuitry configured to receive the combined transmission path signal via at least one coupler;

filter circuitry configured to filter the combined transmission path signal to separate the first signal component from the second frequency component, and to separately output the first signal component and the second signal component; and

power control circuitry configured to receive the separately output first and second signal components, and to generate a first power control signal based on the first signal component and a second power control signal based on the second signal component,

wherein the transmitter circuitry is further configured to adjust a power of the first signal component based at least in part on the first power control signal and to adjust a power of the second signal component based at least in part on the second power control signal.

24. The system of claim 23, wherein the filter circuit is configured to filter the combined transmission via selecting, based at least in part on the first frequency band and the second frequency band, a first filter and a second filter from a plurality of filters, wherein the first filter is one of a first selected lowpass filter or a first selected bandpass filter, wherein the second filter is one of a second selected highpass filter or a second selected bandpass filter, wherein the first filter and the second filter separate the first signal component from the second signal component.

25. The system of claim 23, wherein the filter circuit is configured to filter the combined transmission via selecting, based at least in part on the first frequency band and the second frequency band, a frequency multiplexer from a plurality of frequency multiplexers, wherein the selected frequency multiplexer separates the first signal component from the second signal component.