Method and system for mitigating leakage of a 60 GHz transmitted signal back into an RF input of a 60 GHz device

• US 8,977,219 B2
• Filed: 09/30/2010
• Issued: 03/10/2015
• Est. Priority Date: 09/30/2010
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Ahmadreza, Rofougaran, Maryam
• Primary Examiner(s): Tsvey, Gennadiy
• Application Number:
  US12/895,520
• Publication Number:
  US 20120083215A1
• Time in Patent Office: 1,622 Days
• Field of Search: 455/77, 455/118
• US Class Current: 455/118
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04B 7/0691 using subgroups of transmit antennas

Abstract

Methods and systems for antenna switching for mitigating leakage of a 60 GHz transmitted signal back into an RF input of a 60 GHz device are disclosed and may include configuring one or more antennas in the plurality of remote RF modules based on a measured signal characteristic, wherein the RF modules receive IF signals via coaxial lines. In-phase (I) and quadrature phase (Q) signals may be generated from the received IF signals. The generated I and Q signals may be summed before being transmitted via the antennas. The received IF signals may be up-converted into first I and Q signals, filtered, and up-converted a second time into the generated I and Q signals. Control signals for the RF modules may be communicated utilizing the coaxial lines. A local oscillator frequency may be configured for the up-conversion of signals via the communicated control signals.

Claims

1. A method for wireless communication, comprising:

selecting a subset of a plurality of antennas in a plurality of remote RF modules included in a wireless communication device based on a measured signal characteristic, each of said plurality of remote RF modules receiving IF signals via one or more coaxial lines, said IF signals being amplified analog IF signals that were amplified by a power amplifier in a final amplification stage;

communicating control signals for said plurality of remote RF modules using the one or more coaxial lines;

generating first in-phase and quadrature phase signals by directly upconverting said received IF signals;

filtering said first in-phase and quadrature phase signals;

upconverting said filtered first in-phase and quadrature phase signals into RF in-phase and quadrature signals;

summing said RF in-phase and quadrature signals; and

transmitting said summed RF in-phase and quadrature signals via said selected one or more antennas without using another power amplifier.

2. The method according to claim 1, comprising configuring a local oscillator frequency for said up-conversion of said received IF signals and said up-conversion of said filtered first in-phase and quadrature phase signals via said communicated control signals.

3. The method according to claim 1, comprising configuring said filtering of said first in-phase and quadrature phase signals utilizing said communicated control signals.

4. The method according to claim 1, comprising tapping said IF signals in said one or more coaxial lines at taps coupled to said each of said plurality of remote RF modules.

5. The method according to claim 1, comprising generating RF signals from IF signals from one or more baseband signals.

6. The method according to claim 5, wherein said RF signals comprise 60 GHz the signals.

7. A system for wireless communication, comprising:

one or more circuits in a wireless communication device, said one or more circuits being configured to;

select a subset of a plurality of antennas in a plurality of remote RF modules based on a measured signal characteristic, each of said plurality of remote RF modules receives IF signals via one or more coaxial lines, said IF signals being amplified analog IF signals that were amplified by a power amplifier in a final amplification stage;

communicate control signals for said plurality of remote RF modules using the one or more coaxial lines;

generate first in-phase and quadrature phase signals by directly upconverting said received IF signals;

filter said first in-phase and quadrature phase signals;

upconvert said filtered first in-phase and quadrature phase signals into RF in-phase and quadrature signals;

sum said RF in-phase and quadrature signals; and

transmit said summed RF in-phase and quadrature signals via said selected one or more antennas without using another power amplifier.

8. The system according to claim 7, wherein said one or more circuits are operable to configure a local oscillator frequency for said up-conversion of said received IF signals and said up-conversion of said filtered first in-phase and quadrature phase signals via said communicated control signals.

9. The system according to claim 7, wherein said one or more circuits are operable to configure said filtering of said first in-phase and quadrature phase signals utilizing said communicated control signals.

10. The system according to claim 7, wherein said one or more circuits are operable to tap said IF signals in said one or more coaxial lines at taps coupled to said each of said plurality of remote RF modules.

11. The system according to claim 7, wherein said one or more circuits are operable to generate RF signals from IF signals from one or more baseband signals.

12. The system according to claim 11, wherein said RF signals comprise 60 GHZ the signals.