Diversity Receiver System with Interference Cancellation and Methods for Use Therewith

• US 20090143041A1
• Filed: 11/29/2007
• Published: 06/04/2009
• Est. Priority Date: 11/29/2007
• 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 7,949,366 B2
• Time in Patent Office: Days
• US Class Current: 455/296
• CPC Class Codes: H04B 1/126 having multiple inputs, e.g. auxiliary antenna for receiving interfering signal aerials in general H01Q
• CPC Class Codes: H04B 7/0842 Weighted combining

Abstract

A diversity receiver includes a first radio frequency (RF) receiver section receives a first inbound RF signal over a range of frequencies and generates a first amplified RF signal, wherein the first inbound RF signal includes a desired RF signal component and an undesired signal component. A second RF receiver section receives a second inbound RF signal over the range of frequencies and generates a second amplified RF signal, wherein the second inbound RF signal includes the desired signal component and the undesired signal component. A first RF cancellation module generates a desired RF signal from the desired RF signal component while attenuating the undesired signal component, based on the first amplified RF signal and the second amplified RF signal.

Claims

1. A voice, data and RF integrated circuit (IC) for use in a diversity receiver, the voice, data and RF IC comprising:

a first radio frequency (RF) receiver section coupled to receive a first inbound RF signal over a range of frequencies and generate a first amplified RF signal, wherein the first inbound RF signal includes a desired RF signal component and an undesired signal component;

a second RF receiver section coupled to receive a second inbound RF signal over the range of frequencies and generate a second amplified RF signal, wherein the second inbound RF signal includes the desired signal component and the undesired signal component; and

a first RF cancellation module, coupled to the first RF receiver section and the second RF receiver section, that provides a desired RF signal from the desired RF signal component while attenuating the undesired signal component, based on the first amplified RF signal and the second amplified RF signal.

2. The voice, data and RF IC of claim 1, wherein the first RF cancellation module includes:

a phase/gain adjustment module that adjusts the gain and phase of the second amplified RF signal, in response to a first control signal, to produce an adjusted signal; and

a RF combining module that combining the first amplified RF signal with the adjusted signal to produce a combined signal.

3. The voice, data and RF IC of claim 2 further comprising:

a monitor module, coupled to the first RF receiver section, that monitors a performance parameter of the desired RF signal and generates a receiver signal that indicates a value of the performance parameter; and

a processing module, coupled to the first RF cancellation module and the monitor module, that generates the first control signal based on the value of the performance parameter.

4. The voice, data and RF IC of claim 3 wherein the performance parameter includes one of, a signal to noise ratio, a signal to interference ratio, a signal to noise and interference ratio and a bit error rate.

5. The voice, data and RF IC of claim 3 wherein the first RF cancellation module further includes a multiplexer for selecting in response to a second control signal the desired RF signal as one of, the first amplified RF signal, and the combined signal.

6. The voice, data and RF IC of claim 5 wherein the processing module generates the second control signal based on the performance parameter.

7. The voice, data and RF IC of claim 1 further comprising:

a second RF cancellation module, coupled to the first RF receiver section and the second RF receiver section, that selectively provides the desired RF signal while attenuating the undesired signal, in response to at least one control signal.

8. A diversity receiver comprising:

a first radio frequency (RF) receiver section coupled to receive a first inbound RF signal and generate a first amplified RF signal, wherein the first inbound RF signal includes a desired RF signal component and an undesired signal component;

a second RF receiver section coupled to receive a second inbound RF signal and generate a second amplified RF signal, wherein the second inbound RF signal includes the desired RF signal component and the undesired signal component; and

a first RF cancellation module, coupled to the first RF receiver section and the second RF receiver section, that provides a desired RF signal from the desired RF signal component while attenuating the undesired signal component, wherein the first RF cancellation module includes;

a phase/gain adjustment module that adjusts the gain and phase of the second amplified RF signal, in response to a first control signal, to produce an adjusted signal; and

a RF combining module that combining the first amplified RF signal with the adjusted signal to produce the desired RF signal;

wherein the first RF receiver section receives the first inbound RF signal over a range of frequencies, the second RF receiver section receives the second inbound RF signal over the range of frequencies.

9. The diversity receiver of claim 8 further comprising:

a monitor module, coupled to the first RF receiver section, that monitors a performance parameter of the desired RF signal and generates a receiver signal that indicates a value of the performance parameter; and

a processing module, coupled to the first RF cancellation module and the monitor module, that generates the first control signal based on the value of the performance parameter.

10. The diversity receiver of claim 9 wherein the performance parameter includes one of, a signal to noise ratio, a signal to interference ratio, a signal to noise and interference ratio and a bit error rate.

11. The diversity receiver of claim 9 wherein the first RF cancellation module further includes a multiplexer for selecting in response to a second control signal the desired RF signal as one of, the first amplified RF signal, and a combined signal from the RF combining module.

12. The diversity receiver of claim 11 wherein the processing module generates the second control signal based on the performance parameter.

13. The diversity receiver of claim 8 further comprising:

a second RF cancellation module, coupled to the first RF receiver section and the second RF receiver section, that selectively provides the desired RF signal while attenuating the undesired signal, in response to at least one control signal.

14. A method for use in a voice, data and RF integrated circuit (IC), the method comprising:

receiving a first inbound RF signal over a range of frequencies, wherein the first inbound RF signal includes a desired RF signal component and an undesired signal component;

generating a first amplified RF signal from the first inbound RF signal;

receiving a second inbound RF signal over the range of frequencies, wherein the second inbound RF signal includes the desired RF signal component and the undesired signal component;

generating a second amplified RF signal from the second inbound RF signal; and

processing the first amplified RF signal and the second amplified RF signal to provide a desired RF signal based on the desired signal component while attenuating the undesired signal component.

15. The method of claim 14, wherein the step of processing includes:

adjusting the gain and phase of the second inbound RF signal, in response to a first control signal, to produce an adjusted signal; and

producing a combined signal that includes the desired signal and attenuates the undesired signal by combining the first inbound RF signal with the adjusted signal.

16. The method of claim 15 further comprising:

monitoring a performance parameter of the desired RF signal;

generating a receiver signal that indicates a value of the performance parameter; and

generating the first control signal based on the value of the performance parameter.

17. The method of claim 16 wherein the performance parameter includes one of, a signal to noise ratio, a signal to interference ratio, a signal to noise and interference ratio and a bit error rate.

18. The method of claim 14 wherein the step of processing further includes:

selecting in response to a second control signal, the desired RF signal as one of, the first amplified RF signal, and the combined signal.

19. The method of claim 14 wherein the step of processing further includes:

generating the second control signal based on the performance parameter.