Configurable Receiver Architecture for Carrier Aggregation with Multiple-Input Multiple-Output

1. A communication device, comprising: a first multiplexer configured to select between first and second oscillator signals to provide a first output signal; a first mixer configured to mix the first output signal with either a first amplified signal associated with a first antenna or a second amplified signal associated with a second antenna; a second multiplexer configured to select between the first and second oscillator signals to provide a second output signal; and a second mixer configured to mix the second output signal with either a third amplified signal associated with the first antenna or a fourth amplified signal associated with the second antenna.

2. The communication device of claim 1 , wherein the first and second multiplexers are configured to select between the first and second oscillator signals based on an operating mode of the communication device.

3. The communication device of claim 2 , wherein the operating mode is: a first Multiple-input Multiple-output (MIMO) communication mode utilizing the first oscillator signal to downconvert a first frequency band, a second MIMO communication mode utilizing the second oscillator signal to downconvert a second frequency band, or a third MIMO communication mode including a Carrier Aggregation (CA) configuration, the third MIMO communication mode utilizing the first oscillator signal to downconvert the first frequency band and the second oscillator signal to downconvert the second frequency band.

4. The communication device of claim 1 , further comprising a processor, wherein: during a first Multiple-input Multiple-output (MIMO) communication mode utilizing a first frequency band, the processor is configured to: control the first and second multiplexers to output the first oscillator signal as the first output signal and the second output signal, respectively; control inputs of the first mixer such that the first mixer mixes the first amplified signal with the first output signal; and control inputs of the second mixer such that the second mixer mixes the fourth amplified signal with the second output signal; during a second MIMO communication mode utilizing a second frequency band, the processor is configured to: control the first and second multiplexers to output the second oscillator signal as the first output signal and the second output signal, respectively; control the inputs of the first mixer such that the first mixer mixes the second amplified signal with the first output signal; and control the inputs of the second mixer such that the second mixer mixes the third amplified signal with the second output signal; and during a third MIMO communication mode including a Carrier Aggregation (CA) configuration that utilizes both the first and second frequency bands, the processor is configured to: control the first multiplexer to output the first oscillator signal as the first output signal; control the second multiplexer to output the second oscillator signal as the second output signal; control the inputs of the first mixer such that the first mixer mixes to mix the first amplified signal with the first output signal; and control the inputs of the second mixer such that the second mixer mixes to mix the third amplified signal with the second output signal.

5. The communication device of claim 1 , further comprising: a first low-noise amplifier (LNA) configured to generate the first amplified signal based on a first signal associated with the first antenna; a second LNA configured to generate the second amplified signal based on a second signal associated with the second antenna; a third LNA configured to generate the third amplified signal based on a third signal associated with the first antenna; and a fourth LNA configured to generate the fourth amplified signal based on a fourth signal associated with the second antenna.

6. The communication device of claim 5 , comprising: a diplexer configured to connect the first antenna to the first LNA via a first signal path and to the third LNA via a third signal path, and to generate the first and third signals based on a first input signal received via the first antenna; and a switching module configured to selectively connect the second antenna to the second LNA via a second signal path and to the fourth LNA via a fourth signal path based on an operating mode of the communication device.

7. The communication device of claim 6 , comprising: a first duplexer in the first signal path configured to filter the first signal and provide the filtered first signal to the first LNA, and to filter a transmit signal and provide the filtered transmit signal to the first antenna, wherein the first duplexer is associated with a first frequency band; a first surface acoustic wave (SAW) filter module configured to filter the second signal and provide the filtered second signal to the second LNA, the first SAW filter module being associated with a second frequency band; a second duplexer in the third signal path configured to filter the third signal and provide the filtered third signal to the third LNA, and to filter the transmit signal and provide the filtered transmit signal to the first antenna, wherein the second duplexer is associated with the second frequency band; and a second SAW filter module configured to filter the fourth signal and provide the filtered fourth signal to the fourth LNA, the second SAW filter module being associated with the first frequency band.

8. The communication device of claim 7 , wherein the first and second multiplexers are configured to selectively output the first and second oscillator signals based on an operating mode of the communication device; wherein the switching module is configured to selectively connect the second antenna to the second LNA via the second signal path and to the fourth LNA via a fourth signal path based on the operating mode of the communication device; and wherein the communication device is configured to selectively activate the first, second, third, and fourth LNAs based on the operating mode of the communication device.

9. The communication device of claim 8 , wherein the operating mode of the communication device is: a first Multiple-input Multiple-output (MIMO) communication mode utilizing the first oscillator signal to downconvert a first frequency band, a second MIMO communication mode utilizing the second oscillator signal to downconvert a second frequency band, or a third MIMO communication mode including a Carrier Aggregation (CA) configuration, the third MIMO communication mode utilizing the first oscillator signal to downconvert the first frequency band and the second oscillator signal to downconvert the second frequency band.

10. The communication device of claim 6 , wherein the operating mode is: a first Multiple-input Multiple-output (MIMO) communication mode utilizing a first frequency band, a second MIMO communication mode utilizing a second frequency band, or a third MIMO communication mode including a Carrier Aggregation (CA) configuration, the third MIMO communication mode utilizing the first and second frequency bands.

11. The communication device of claim 5 , wherein the communication device is configured to selectively activate the first, second, third, and fourth LNAs based on an operating mode of the communication device.

12. The communication device of claim 11 , wherein the operating mode includes: a first Multiple-input Multiple-output (MIMO) communication mode utilizing a first frequency band, a second MIMO communication mode utilizing a second frequency band, and a third MIMO communication mode including a Carrier Aggregation (CA) configuration, the third MIMO communication mode utilizing the first and second frequency bands.

13. A method, comprising: selecting between a first oscillator signal and a second oscillator signal to provide a first output signal based on which of three different Multiple-input Multiple-output (MIMO) communication modes a communication device is operating in; mixing the first output signal with either a first amplified signal associated with a first antenna or a second amplified signal associated with a second antenna based on which of the three different MIMO communication modes the communication device is operating in; selecting between the first oscillator signal and the second oscillator signal to provide a second output signal based on which of the three different MIMO communication modes the communication device is operating in; and mixing the second output signal with either a third amplified signal associated with the first antenna or a fourth amplified signal associated with the second antenna based on which of the three different MIMO communication modes the communication device is operating in.

14. The method of claim 13 , wherein the three different MIMO communication modes comprise: a first MIMO communication mode utilizing the first oscillator signal to downconvert a first frequency band, a second MIMO communication node utilizing the second oscillator signal to downconvert a second frequency band, and a third MIMO communication mode including a Carrier Aggregation (CA) configuration, the third MIMO communication mode utilizing the first oscillator signal to downconvert the first frequency band and the second oscillator signal to downconvert the second frequency band.

15. A communication device, comprising: a first multiplexer configured to select between a first oscillator signal and a second oscillator signal to provide a first output signal based on which of three different Multiple-input Multiple-output (MIMO) communication modes a communication device is operating in; a first mixer configured to mix the first output signal with either a first amplified signal associated with a first antenna or a second amplified signal associated with a second antenna based on which of the three different MIMO communication modes the communication device is operating in; a second multiplexer configured to select between the first oscillator signal and the second oscillator signal to provide a second output signal based on which of the three different MIMO communication modes the communication device is operating in; and a second mixer configured to mix the second output signal with either a third amplified signal associated with the first antenna or a fourth amplified signal associated with the second antenna based on which of the three different MIMO communication modes the communication device is operating in.

16. The communication device of claim 15 , wherein the three different MIMO communication modes comprise: a first MIMO communication mode utilizing the first oscillator signal to downconvert a first frequency band, a second MIMO communication mode utilizing the second oscillator signal to downconvert a second frequency band, and a third MIMO communication mode including a Carrier Aggregation (CA) configuration, the third MIMO communication mode utilizing the first oscillator signal to downconvert the first frequency band and the second oscillator signal to downconvert the second frequency band.

17. The communication device of claim 16 , further comprising a processor, wherein based on the communication device operating in the first MIMO communication mode, the processor is configured to: control the first and second multiplexers to output the first oscillator signal as the first output signal and the second output signal, respectively; control inputs of the first mixer such that the first mixer mixes the first amplified signal with the first output signal; and control inputs of the second mixer such that the second mixer mixes the fourth amplified signal with the second output signal.

18. The communication device of claim 17 , wherein based on the communication device operating in the second MIMO communication mode, the processor is configured to: control the first and second multiplexers to output the second oscillator signal as the first output signal and the second output signal, respectively; control the inputs of the first mixer such that the first mixer mixes the second amplified signal with the first output signal; and control the inputs of the second mixer such that the second mixer mixes the third amplified signal with the second output signal.

19. The communication device of claim 18 , wherein based on the communication device operating in the third MIMO communication mode, the processor is configured to: control the first multiplexer to output the first oscillator signal as the first output signal; control the second multiplexer to output the second oscillator signal as the second output signal; control the inputs of the first mixer such that the first mixer mixes the first amplified signal with the first output signal; and control the inputs of the second mixer such that the second mixer mixes the third amplified signal with the second output signal.

20. The communication device of claim 16 , further comprising a processor, wherein: based on the communication device operating in the first MIMO communication mode, the processor is configured to control the first and second multiplexers to output the first oscillator signal as the first output signal and the second output signal, respectively; based on the communication device operating in the second MIMO communication mode, the processor is configured to control the first and second multiplexers to output the second oscillator signal as the first output signal and the second output signal, respectively; and based on the communication device operating in the third MIMO communication mode, the processor is configured to control the first multiplexer to output the first oscillator signal as the first output signal and control the second multiplexer to output the second oscillator signal as the second output signal.