INDEPENDENT POWER CONSUMPTION MANAGEMENT IN A MIMO TRANSCEIVER AND METHOD FOR USE THEREWITH

• US 20120289279A1
• Filed: 07/26/2012
• Published: 11/15/2012
• Est. Priority Date: 09/26/2007
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Ahmadreza (Reza)
• Granted Patent: US 8,437,711 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/02 Power saving arrangements in wired systems H04L12/12; signaling of mobile application services, e.g. low battery notifications H04W4/20
• CPC Class Codes: H04W 52/245 taking into account received signal strength
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

An integrated circuit (IC) includes a multi-input multi-output transceiver system that includes a plurality of RF transceivers. Each RF transceiver includes an RF transmitter that transmits a transmit signal at a selected transmit power, based on a transmit power control signal and a corresponding RF receiver for receiving a corresponding one of a plurality of received signals from an external device and for generating a signal strength indication corresponding to each of the plurality of received signals. A processing module generates the transmit power control signal for each RF transmitter based on the signal strength indication of the corresponding RF receiver, and that generates a power mode signal for adjusting a power consumption parameter of each RF transmitter in accordance with the selected transmit power for each RF transmitter.

Claims

1. An integrated circuit (IC) for use in a multi-input multi-output transceiver, the IC comprising:

a plurality of RF transceivers, each RF transceiver including;

an RF transmitter that transmits a transmit signal at a selected transmit power, based on a transmit power control signal; and

a corresponding RF receiver for receiving a corresponding one of a plurality of received signals from an external device;

a processing module, coupled to the plurality of RF transceivers, that generates the transmit power control signal for each RF transmitter based on the signals received by the corresponding RF receiver, and that generates a power mode signal corresponding to a power consumption parameter of each RF transmitter in accordance with the selected transmit power for each RF transmitter.

2. The IC of claim 1 wherein the processing module generates the transmit power control signals for each RF transmitter to control the selected power level of at least one RF transmitter to a first value and the selected power level of at least one other RF transmitter to a second value.

3. The IC of claim 1 further comprising:

a power management circuit, coupled to the processing module, that adjusts the power consumption parameter of each RF transmitter based on the power mode signal.

4. The IC of claim 3 wherein the power management circuit generates a plurality of power supply signals based on the power mode signal.

5. The IC of claim 1 wherein an off-chip power management circuit adjusts the power consumption parameter of each RF transmitter based on the power mode signal.

6. The IC of claim 1 wherein the power consumption parameter includes a power supply voltage.

7. The IC of claim 1 wherein the power consumption parameter includes a power supply current.

8. The IC of claim 1 wherein each RF transmitter operates in a selected one of a plurality of operating ranges based on the power mode signal;

and

operates from at least one transmitter power supply signal generated by a power management circuit in response to the power mode signal.

9. The IC of claim 8 wherein the power management circuit generates an additional transmitter power supply signal in response to the power mode signal.

10. The IC of claim 8 wherein the power management circuit generates a first transmitter power supply signal having a first current limit in response to a first value of the power mode signal, and a second transmitter power supply signal having a second current limit in response to a second value of the power mode signal.

11. The IC of claim 8 wherein the power management circuit generates a first transmitter power supply signal having a first supply voltage in response to a first value of the power mode signal, and a second transmitter power supply signal having a second supply voltage in response to a second value of the power mode signal.

12. The IC of claim 1 wherein the plurality of RF transceivers operate in accordance with at least one of, a wireless local area network protocol, a pico area network protocol, a wireless telephony protocol, and a wireless data protocol.

13. A method for use in a multi-input multi-output transceiver, the method comprising:

selecting a corresponding power level for a plurality of RF transmitters based on a plurality of transmit power control signals;

transmitting each of a plurality of transmit signals at the corresponding power level;

receiving a plurality of received signals from an external device via a corresponding plurality of RF receivers, each of the corresponding plurality of RF receivers corresponding to one of the plurality of RF transmitters;

generating the plurality of transmit power control signals based on the signals received from the corresponding plurality of RF receivers; and

generating a plurality of power mode signals in accordance with the corresponding power level for the plurality of RF transmitters.

14. The method of claim 13 further comprising:

adjusting a plurality of power consumption parameters for the plurality of RF transmitters based on the plurality of power mode signals.

15. The method of claim 14 wherein at least one of the plurality of power consumption parameters includes a power supply voltage.

16. The method of claim 14 wherein at least one of the plurality of power consumption parameters includes a power supply current.

17. A method for use in a multi-input multi-output (MIMO) transceiver, the method comprising:

selecting a corresponding power level for a plurality of RF transmitters based on a plurality of transmit power control signals;

transmitting each of a plurality of transmit signals at the corresponding power level;

receiving a plurality of received signals from an external device via a corresponding plurality of RF receivers, each of the corresponding plurality of RF receivers corresponding to one of the plurality of RF transmitters;

generating the plurality of transmit power control signals based on the signals received from the corresponding plurality of RF receivers;

generating a plurality of power mode signals in accordance with the corresponding power level for the plurality of RF transmitters; and

adjusting a plurality of power consumption parameters for the plurality of RF transmitters based on the plurality of power mode signals.

18. The method of claim 17 wherein at least one of the plurality of power consumption parameters includes a power supply voltage.

19. The method of claim 17 wherein at least one of the plurality of power consumption parameters includes a power supply current.

20. The method of claim 17 wherein the MIMO transceiver operates in accordance with at least one of, a wireless local area network protocol, a pico area network protocol, a wireless telephony protocol, and a wireless data protocol.