Method and apparatus for noise canceling
First Claim
Patent Images
1. A circuit in a device, comprising:
- a transceiver circuit, comprising;
a first receiver circuit, configured to receive a first signal from an antenna that captures a combination of a target signal transmitted from outside the device and an output signal driven by a transmitter outside the transceiver circuit in the device;
a second receiver circuit configured to receive a second signal generated based on the output signal;
a processing circuit configured to cancel from the first signal noise due to the output signal based on the second signal; and
a controller configured to turn on the second receiver circuit when a received signal strength indication (RSSI) of the first receiver circuit is lower than a threshold.
2 Assignments
0 Petitions
Accused Products
Abstract
Aspects of the disclosure can provide a circuit to be used in a device. The circuit includes a first receiver circuit, a second receiver circuit and a processing circuit. The first receiver circuit is configured to receive a first signal from an antenna that captures a combination of a target signal transmitted from another device to the device and an output signal driven by a transmitter in the device. The second receiver circuit is configured to receive a second signal generated based on to the output signal. The processing circuit is configured to cancel from the first signal noise due to the output signal based on the second signal.
24 Citations
22 Claims
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1. A circuit in a device, comprising:
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a transceiver circuit, comprising; a first receiver circuit, configured to receive a first signal from an antenna that captures a combination of a target signal transmitted from outside the device and an output signal driven by a transmitter outside the transceiver circuit in the device; a second receiver circuit configured to receive a second signal generated based on the output signal; a processing circuit configured to cancel from the first signal noise due to the output signal based on the second signal; and a controller configured to turn on the second receiver circuit when a received signal strength indication (RSSI) of the first receiver circuit is lower than a threshold. - View Dependent Claims (2, 3)
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4. A circuit in a device, comprising:
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a transceiver circuit, comprising; a first receiver circuit, configured to receive a first signal from an antenna that captures a combination of a target signal transmitted from outside the device and an output signal driven by a transmitter outside the transceiver circuit in the device; a second receiver circuit configured to receive a second signal generated based on the output signal; and a processing circuit configured to cancel from the first signal noise due to the output signal based on the second signal, wherein; the first receiver circuit is configured to down-convert the first signal into baseband; the second receiver circuit is configured to down-convert the second signal into baseband; and the processing circuit is configured to perform baseband processing to cancel the noise from the first signal. - View Dependent Claims (5, 6, 7, 8)
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9. A method for a device to receive a wireless signal, comprising:
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receiving a first signal from an antenna that captures a combination of the wireless signal transmitted from outside the device and an output signal transmitted by the device; receiving a second signal generated based on the output signal; cancelling from the first signal noise due to the output signal based on the second signal; detecting a received signal strength indication (RSSI) of the wireless signal in the first signal; and receiving the second signal when the RSSI is lower than a threshold. - View Dependent Claims (10, 11)
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12. A method for a device to receive a wireless signal, comprising:
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receiving a first signal from an antenna that captures a combination of the wireless signal transmitted from outside the device and an output signal transmitted by the device; receiving a second signal generated based on the output signal; cancelling from the first signal noise due to the output signal based on the second signal; down-converting the first signal into a first baseband signal; down-converting the second signal into a second baseband signal; and processing the first baseband signal and the second baseband signal to cancel the noise. - View Dependent Claims (13, 14, 15, 16)
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17. An apparatus, comprising:
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a transmitter configured to transmit an output signal; a first receiver path configured to receive a first signal from an antenna that captures a combination of a target signal transmitted from another apparatus to the apparatus and the output signal; a coupler configured to generate a second signal based on the output signal; a second receiver path configured to receive the second signal; a noise cancellation module configured to cancel from the first signal noise due to the output signal based on the second signal; and a controller configured to turn on the second receiver path when a received signal strength indication (RSSI) of the first receiver path is lower than a threshold. - View Dependent Claims (18)
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19. An apparatus, comprising:
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a transmitter configured to transmit an output signal; a first receiver path configured to receive a first signal from an antenna that captures a combination of a target signal transmitted from another apparatus to the apparatus and the output signal; a coupler configured to generate a second signal based on the output signal; a second receiver path configured to receive the second signal; and a noise cancellation module configured to cancel from the first signal noise due to the output signal based on the second signal, wherein; the first receiver path is configured to down-convert the first signal into baseband; the second receiver path is configured to down-convert the second signal into baseband; and the noise cancellation module is configured to perform baseband processing to cancel the noise from the first signal. - View Dependent Claims (20, 21, 22)
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Specification