Multi-transmission capable data transmission system and method of operating the same

Patent metadata

Field	Value
Publication number	US-11102729-B2
Application number	US-201615736416-A
Country	US
Kind code	B2
Filing date	May 23, 2016
Priority date	Jun 24, 2015
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A data transmission system may comprise a first transmission chain comprising a first transmission power controller, the first transmission power controller being configured to operate in an open loop power control mode or in a closed loop power control mode; a second transmission chain; and a power control mode selector configured to select the first transmission power controller to operate in the open loop power control mode or in the closed loop power control mode based on at least one quantity indicative of interference induced by the second transmission chain in the first transmission power controller when operating in the closed loop power control mode.

First claim

The invention claimed is:

1. A data transmission system comprising:
a first transmission chain comprising a first transmission power controller, the first transmission power controller is configured to operate in an open loop power control mode or in a closed loop power control mode;
a second transmission chain; and
a power control mode selector configures the first transmission power controller to operate in the open loop power control mode or in the closed loop power control mode based on at least one quantity indicative of interference induced by the second transmission chain in the first transmission power controller when operating in the closed loop power control mode and based on an activated multi-transmission mode or an activated single transmission mode of the data transmission system.

2. The data transmission system of claim 1 , wherein the power control mode selector configures the first transmission power controller based on a frequency pairing of a first transmission frequency of the first transmission chain and a second transmission frequency of the second transmission chain.

3. The data transmission system of claim 1 , wherein the power control mode selector configures the first transmission power controller based on a transmission power pairing of a first transmission power of the first transmission chain and a second transmission power of the second transmission chain.

4. The data transmission system of claim 1 , wherein the power control mode selector configures the first transmission power controller based on a measurement indicative of a leakage of transmission power of the second transmission chain into the first transmission chain.

5. The data transmission system of claim 1 , further comprising:
a first look-up table;
wherein the first look-up table is configured to perform an update process of entries of the first look-up table based on transmission power measurement values obtained while the data transmission system is operated in the closed loop power control mode; and
wherein the open loop power control mode of the first transmission power controller is further configured to set a transmission power of the first transmission chain based on the first look-up table.

6. The data transmission system of claim 5 , further comprising:
an interference indicator configured to enable or disable the update process, wherein the interference indicator is configured to enable the update process if the interference induced by the second transmission chain in the first transmission power controller when operating in the closed loop power control mode is estimated to be small.

7. The data transmission system of claim 5 , wherein the first look-up table comprises first entries and second entries,
wherein the first entries are target transmission power levels of the first transmission chain;
wherein the second entries are setting values for the first transmission power controller; and
wherein each setting value corresponds to a respective target transmission power level.

8. The data transmission system of claim 7 , further comprising:
a second look-up table;
wherein the second look-up table comprises adjustment values for adjusting the second entries of the first look-up table, the adjustment values are based on one or more of a temperature, a supply voltage and a spatial orientation of the data transmission system.

9. The data transmission system of claim 8 , wherein the second look-up table is configured to adjust the second entries of the first look-up table if one or more of a time span since a last update of the second entries of the first look-up table, a change in the temperature, a change in the supply voltage and a change in the spatial orientation of the data transmission system exceeds a respective certain threshold.

10. The data transmission system of claim 1 , wherein the data transmission system is comprised in a wireless device.

11. The data transmission system of claim 1 , wherein the data transmission system is comprised in a cable-based device.

12. The data transmission system of claim 1 , further comprising:
a second transmission power controller comprised in the second transmission chain; wherein the power control mode selector configures the second transmission power controller to operate in the open loop power control mode or in the closed loop power control mode, wherein the configuration of the second transmission power controller is based on at least one quantity indicative of interference induced by the first transmission chain in the second transmission power controller when operated in the closed loop power control mode.

13. The data transmission system of claim 1 , wherein the first transmission chain is configured to transmit first data via a first antenna and the second transmission chain is configured to transmit second data via a second antenna.

14. The data transmission system of claim 1 , wherein the first transmission chain and the second transmission chain are configured to transmit first data and second data via a common antenna.

15. The data transmission system of claim 1 , wherein the power control mode selector is implemented in software.

16. The data transmission system of claim 1 , wherein the first transmission chain comprises a power amplifier and wherein the first transmission power controller is configured to control an input power of the power amplifier.

17. The data transmission system of claim 1 , wherein the first transmission chain comprises a power amplifier and wherein the first transmission power controller is configured to control a power supply of the power amplifier.

18. A multi-transmission communication system comprising: a first transmitter;
a first transmission power controller configured to control a transmission power of the first transmitter;
a second transmitter;
a second transmission power controller configured to control a transmission power of the second transmitter; and
a power control mode selector configured to receive at least one quantity and to set the first transmission power controller in an open loop power control mode or a closed loop power control mode based on the at least one quantity, and based on an activated multi-transmission mode or an activated single transmission mode of the multi-transmission communication system,
wherein the at least one quantity is indicative of interference induced by the second transmitter in the first transmission power controller when operating in the closed loop power control mode.

19. A method of operating a multi-transmission system, wherein the multi-transmission system is configured to transmit first data using a first transmission chain and second data using a second transmission chain, the method comprising:
controlling a transmission power of the first transmission chain in an open loop power control mode or in a closed loop power control mode; and
selecting the open loop power control mode or the closed loop power control mode at least partially based on at least one quantity indicative of interference induced by the second transmission chain in the closed loop power control mode and based on an activated multi-transmission system mode or an activated single transmission mode of the multi-transmission system.

20. The method of claim 19 , further comprising:
controlling the transmission power of the first transmission chain in the open loop power control mode by using a first look-up table;
measuring the transmission power of the first transmission chain in the closed l

Assignees

• Apple Inc

Inventors

• Langer Andreas
• Bruder Thomas

Classifications

• H04W52/243 Primary

  taking into account interferences · CPC title

• H04W52/06 Primary

  TPC algorithms · CPC title

• H04W52/10

  Open loop power control · CPC title

• H04W52/42

  in systems with time, space, frequency or polarisation diversity · CPC title

• H04W52/52

  using AGC [Automatic Gain Control] circuits or amplifiers · CPC title