RF transceiver with adjustable antenna assembly

• US 20080280571A1
• Filed: 05/11/2007
• Published: 11/13/2008
• Est. Priority Date: 05/11/2007
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Maryam, Rofougaran, Ahmadreza (Reza)
• Granted Patent: US 7,933,562 B2
• Time in Patent Office: Days
• US Class Current: 455/77
• CPC Class Codes: H01Q 3/26 varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture H01Q3/12, H01Q3/22, H01Q3/24 take precedence
• CPC Class Codes: H04B 7/0613 using simultaneous transmission H04B7/0686 takes precedence
• CPC Class Codes: H04B 7/0837 using pre-detection combining H04B7/0868 takes precedence
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity

Abstract

A radio frequency (RF) transceiver includes a baseband processing module, a configurable receiver section, a configurable transmitter section and a configurable antenna assembly. The baseband processing module converts outbound data into an outbound symbol stream, converts an inbound symbol stream into inbound data and generates a transmit adjust signal and a receive adjust signal. The receiver section converts an inbound RF signal into the inbound symbol stream. The transmitter section converts the outbound symbol stream into an outbound RF signal. The antenna assembly receives the inbound RF signal via a first antenna structure and transmits the outbound RF signal via a second antenna structure. The first antenna structure and/or the configurable receiver section adjusts phase and/or amplitude of the inbound RF signal in accordance with the receive adjust signal. The second antenna structure and/or the configurable transmitter section adjusts phase and/or amplitude of the outbound RF signal in accordance with the transmit adjust signal.

Claims

1. A radio frequency (RF) transceiver comprises:

a baseband processing module;

a configurable receiver section;

a configurable transmitter section; and

a configurable antenna assembly, wherein, when the RF transceiver is in a first mode;

the baseband processing module is coupled to;

convert outbound data into an outbound symbol stream;

convert an inbound symbol stream into inbound data;

generate a transmit adjust signal; and

generate a receive adjust signal;

the configurable receiver section is coupled to convert an inbound RF signal into the inbound symbol stream;

the configurable transmitter section is coupled to convert the outbound symbol stream into an outbound RF signal; and

the configurable antenna assembly is coupled to receive the inbound RF signal via a first antenna structure and to transmit the outbound RF signal via a second antenna structure, wherein at least one of the first antenna structure and the configurable receiver section adjusts at least one of phase and amplitude of the inbound RF signal in accordance with the receive adjust signal, and wherein at least one of the second antenna structure and the configurable transmitter section adjusts at least one of phase and amplitude of the outbound RF signal in accordance with the transmit adjust signal.

2. The RF transceiver of claim 1 comprises:

the baseband processing module coupled to convert outbound training signal into an outbound training symbol stream;

the configurable transmitter section coupled to convert the outbound training symbol stream into an outbound RF training signal;

the configurable receiver section coupled to convert an inbound RF feedback signal into inbound feedback symbol stream; and

the baseband processing module coupled to;

convert the inbound feedback symbol stream into training signal feedback; and

generate the transmit adjust signal and the receive adjust signal in accordance with the training signal feedback.

3. The RF transceiver of claim 1 comprises:

the configurable receiver section coupled to convert an inbound RF training signal into an inbound training symbol stream; and

the baseband processing module coupled to;

convert the inbound training symbol stream into an inbound training signal;

compare signal properties of the inbound training signal with expected signal properties; and

when the signal properties of the inbound training signal compare unfavorably with the expected signal properties, generate the transmit adjust signal and the receive adjust signal in accordance with the unfavorable comparison.

4. The RF transceiver of claim 1 comprises:

the baseband processing module is coupled to;

convert the outbound data into a first outbound symbol stream and a second outbound symbol stream; and

convert a first inbound symbol stream and a second inbound symbol stream into the inbound data;

the configurable receiver section is coupled to convert a first representation of the inbound RF signal into the first inbound symbol stream and to convert a second representation of the inbound RF signal into the second inbound symbol stream;

the configurable transmitter section is coupled to convert the first outbound symbol stream into a first outbound RF signal and to convert the second outbound symbol stream into a second outbound RF signal; and

the configurable antenna assembly is coupled to receive the first representation of the inbound RF signal via the first antenna structure, receive the second representation of the inbound RF signal via a third antenna structure, transmit the first outbound RF signal via the second antenna structure, and transmit the second outbound RF signal via a fourth antenna structure, wherein the first and third antenna structures are configured in accordance with the receive adjust signal to adjust at least one of phase and amplitude of at least one of the first and second representations of the inbound RF signal, and wherein the second and fourth antenna structures are configured in accordance with the transmit adjust signal to adjust at least one of phase and amplitude of at least one of the first and second outbound RF signals.

5. The RF transceiver of claim 4, wherein the baseband processing module is further coupled to:

determine a first component of the transmit adjust signal;

determine a second component of the transmit adjust signal, wherein the determining of the first and second components of the transmit adjust signal is based on a desired phase relationship between the first and second outbound RF signals;

determine a first component of the receive adjust signal; and

determine a second component of the receive adjust signal, wherein the determining of the first and second components of the receive adjust signal is based on a desired phase relationship between the first and second representations of the inbound RF signal and based on a desired phase relationship between the inbound RF signal and a combination of the first and second outbound RF signals.

6. The RF transceiver of claim 4, wherein the baseband processing module is further coupled to:

generate a plurality of receive adjust signals;

for each of the plurality of receive adjust signals, determine receive signal strength of the inbound RF signal to produce a plurality of received signal strengths; and

provide a corresponding one of the plurality of receive adjust signals that corresponds to a desired one of the plurality of received signal strengths as the receive adjust signal.

7. The RF transceiver of claim 1 comprises:

the baseband processing module is coupled to;

convert first outbound data of the outbound data into a first outbound symbol stream;

convert second outbound data of the outbound data into a second outbound symbol stream;

convert a first inbound symbol stream into first inbound data of the inbound data; and

convert a second inbound symbol stream into second inbound data of the inbound data;

the configurable receiver section is coupled to convert a first representation of the inbound RF signal into the first inbound symbol stream and to convert a second representation of the inbound RF signal into the second inbound symbol stream;

the configurable transmitter section is coupled to convert the first outbound symbol stream into a first outbound RF signal and to convert the second outbound symbol stream into a second outbound RF signal; and

the configurable antenna assembly is coupled to receive the first representation of the inbound RF signal via the first antenna structure, receive the second representation of the inbound RF signal via a third antenna structure, transmit the first outbound RF signal via the second antenna structure, and transmit the second outbound RF signal via a fourth antenna structure, wherein the first and third antenna structures are configured in accordance with the receive adjust signal to adjust at least one of phase and amplitude of at least one of the first and second representations of the inbound RF signal, and wherein the second and fourth antenna structures are configured in accordance with the transmit adjust signal to adjust at least one of phase and amplitude of at least one of the first and second outbound RF signals.

8. The RF transceiver of claim 7, wherein the baseband processing module is further coupled to:

determine a first component of the transmit adjust signal;

determine a second component of the transmit adjust signal, wherein the determining of the first and second components of the transmit adjust signal is based on an orthogonal relationship between the first and second outbound RF signals;

determine a first component of the receive adjust signal; and

determine a second component of the receive adjust signal, wherein the determining of the first and second components of the receive adjust signal is based on an orthogonal relationship between the first and second representations of the inbound RF signal and based on a desired phase relationship between the inbound RF signal and a combination of the first and second outbound RF signals.

9. The RF transceiver of claim 1 further comprises, when the RF transceiver is in a second mode:

the baseband processing module is coupled to;

convert the inbound symbol stream into the inbound data; and

generate the receive adjust signal;

the configurable receiver section is coupled to convert a first representation of the inbound RF signal and a second representation of the inbound RF signal into the inbound symbol stream; and

the configurable antenna assembly is coupled to receive first representation of the inbound RF signal via the first antenna structure and to receive the second representation of the inbound RF signal via the second antenna structure, wherein the first and second antenna structures are configured in accordance with the receive adjust signal to adjust at least one of phase and amplitude of at least one of the first and second representations of the inbound RF signal.

10. The RF transceiver of claim 1 further comprises, when the RF transceiver is in a third mode:

the baseband processing module is coupled to;

convert the outbound data into a first outbound symbol stream and a second outbound symbol stream; and

generate the transmit adjust signal;

the configurable transmitter section is coupled to convert the first outbound symbol stream into a first outbound RF signal and to convert the second outbound symbol stream into a second outbound RF signal; and

the configurable antenna assembly is coupled to transmit the first outbound RF signal via a first antenna structure and to transmit the second outbound RF signal via a second antenna structure, wherein the first and second antenna structures are configured in accordance with the transmit adjust signal to adjust at least one of phase and amplitude of at least one of the first and second outbound RF signals.

11. The RF transceiver of claim 1 further comprises, when the RF transceiver is in a second mode:

the baseband processing module is coupled to;

convert a first inbound symbol stream into first inbound data;

convert a second inbound symbol stream into second inbound data; and

generate the receive adjust signal;

the configurable receiver section is coupled to convert a first inbound RF signal into the first inbound symbol stream and to convert a second inbound RF signal into the second inbound symbol stream; and

the configurable antenna assembly is coupled to receive the first inbound RF signal via the first antenna structure and to receive the second inbound RF signal via the second antenna structure, wherein the first and second antenna structures are configured in accordance with the receive adjust signal to adjust at least one of phase and amplitude of at least one of the first and second inbound RF signals.

12. The RF transceiver of claim 11 further comprises at least one of:

the first and second inbound RF signals having a carrier frequency within a same frequency band; and

the first inbound RF signal having a carrier frequency within a first frequency band and the second inbound RF signal having a carrier frequency within a second frequency band.

13. The RF transceiver of claim 1 further comprises, when the RF transceiver is in a third mode:

the baseband processing module is coupled to;

convert first outbound data into a first outbound symbol stream;

convert second outbound data into a second outbound symbol stream; and

generate the transmit adjust signal;

the configurable transmitter section is coupled to convert the first outbound symbol stream into a first outbound RF signal and to convert the second outbound symbol stream into a second outbound RF signal; and

the configurable antenna assembly is coupled to transmit the first outbound RF signal via a first antenna structure and to transmit the second outbound RF signal via a second antenna structure, wherein the first and second antenna structures are configured in accordance with the transmit adjust signal to adjust at least one of phase and amplitude of at least one of the first and second outbound RF signals.

14. The RF transceiver of claim 13 further comprises at least one of:

the first and second outbound RF signals having a carrier frequency within a same frequency band; and

the first outbound RF signal having a carrier frequency within a first frequency band and the second outbound RF signal having a carrier frequency within a second frequency band.

15. A configurable antenna assembly comprises:

a configurable antenna structure operable, in a first mode, to provide a first antenna structure and a second antenna structure, wherein the first antenna structure receives an inbound radio frequency (RF) signal and the second antenna structure transmits an outbound RF signal, wherein the first antenna structure is configured in accordance with a receive adjust signal to adjust at least one of phase and amplitude of the inbound RF signal, and wherein the second antenna structure is configured in accordance with a transmit adjust signal to adjust at least one of phase and amplitude of the outbound RF signal; and

an antenna interface coupled to the configurable antenna structure and to an RF transceiver front-end.

16. The configurable antenna assembly of claim 15, wherein the configurable antenna structure is operable, in another mode, to provide:

a third antenna structure to receive a second representation of the inbound RF signal, wherein the first antenna structure receives a first representation of the inbound RF signal; and

a fourth antenna structure to transmit a second outbound RF signal, wherein the second antenna structure transmits a first outbound RF signal.

17. The configurable antenna assembly of claim 15 comprises:

the configurable antenna structure operable, in a second mode, to provide a first receive antenna structure and a second receive antenna structure, wherein the first receive antenna structure receives a first representation of the inbound RF signal and the second receive antenna structure receives a second representation of the inbound RF signal, wherein the first and second receive antenna structures are configured in accordance with the receive adjust signal to adjust at least one of phase and amplitude of at least one of the first and second representations of the inbound RF signal.

18. The configurable antenna assembly of claim 15 comprises:

the configurable antenna structure operable, in a third mode, to provide a first transmit antenna structure and a second transmit antenna structure, wherein the first transmit antenna structure transmits a first outbound RF signal and the second transmit antenna structure transmits a second outbound RF signal, wherein the first and second transmit antenna structures are configured in accordance with the transmit adjust signal to adjust at least one of phase and amplitude of at least one of the first and second outbound RF signals.

19. A configurable antenna assembly comprises:

an antenna structure operable, in a first mode, to provide a first antenna structure and a second antenna structure, wherein the first antenna structure receives an inbound radio frequency (RF) signal and the second antenna structure transmits an outbound RF signal,; and

a configurable antenna interface operable in the first mode to provide a first antenna interface and a second antenna interface, wherein the first antenna interface is configured in accordance with a receive adjust signal to adjust at least one of phase and amplitude of the inbound RF signal, and wherein the second antenna interface is configured in accordance with a transmit adjust signal to adjust at least one of phase and amplitude of the outbound RF signal.

20. The configurable antenna assembly of claim 19 comprises:

the antenna structure, in another mode, to provide a third antenna structure and a fourth antenna structure, wherein the third antenna structure receives a second representation of the inbound RF signal and the first antenna structure receives a first representation of the inbound RF signal and the fourth antenna structure transmits a second outbound RF signal and the second antenna structure transmits a first outbound RF signal; and

the configurable antenna interface operable in the another mode to provide a third antenna interface and a fourth antenna interface, wherein the first and third antenna interfaces are configured in accordance with the receive adjust signal to adjust at least one of phase and amplitude of at least one of the first and second representations of the inbound RF signal, and wherein the second and fourth antenna interfaces are configured in accordance with the transmit adjust signal to adjust at least one of phase and amplitude of at least one of the first and second outbound RF signals.

21. The configurable antenna assembly of claim 19 comprises:

the antenna structure operable, in a second mode, to provide a first receive antenna structure and a second receive antenna structure, wherein the first receive antenna structure receives a first representation of the inbound RF signal and the second receive antenna structure receives a second representation of the inbound RF signal; and

the configurable antenna interface operable in the second mode to provide a first receive antenna interface and a second receive antenna interface, wherein the first and second receive antenna interfaces are configured in accordance with the receive adjust signal to adjust at least one of phase and amplitude of at least one of the first and second representations of the inbound RF signal.

22. The configurable antenna assembly of claim 19 comprises:

the antenna structure operable, in a third mode, to provide a first transmit antenna structure and a second transmit antenna structure, wherein the first transmit antenna structure transmits a first outbound RF signal and the second transmit antenna structure transmits a second outbound RF signal; and

the configurable antenna interface operable in the second mode to provide a first transmit antenna interface and a second transmit antenna interface, wherein the first and second transmit antenna interfaces are configured in accordance with the transmit adjust signal to adjust at least one of phase and amplitude of at least one of the first and second outbound RF signal.