Interference Cancellation in Multi-Mode Radio Access Technology Devices
First Claim
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1. A method for reducing interference in a receiver, comprising:
- receiving a first signal, wherein the first signal includes a desired signal and an undesired signal that results from an interfering signal being applied to a first path;
generating a second signal, wherein generating the second signal comprises applying the interfering signal to a second path;
processing the second signal to generate a third signal, including adjusting the second signal based on a difference between a first transfer function of the first path and a second transfer function of the second path; and
subtracting the third signal from the first signal to reduce the undesired signal in the first signal.
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Abstract
Embodiments of the present disclosure provide a novel multi-mode platform architecture with means for reducing the interference due to both out-of-band (OOB) emissions and inter-modulation distortion (IMD) products caused by a first radio access technology (RAT) transmitter on a co-located second RAT receiver. The multi-mode platform architecture may be used in a variety of wireless devices and with a variety of co-located RATs, including, without limitation, WiFi, LTE, WiMAX, WCDMA, Bluetooth, and Zigbee, for example.
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Citations
30 Claims
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1. A method for reducing interference in a receiver, comprising:
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receiving a first signal, wherein the first signal includes a desired signal and an undesired signal that results from an interfering signal being applied to a first path; generating a second signal, wherein generating the second signal comprises applying the interfering signal to a second path; processing the second signal to generate a third signal, including adjusting the second signal based on a difference between a first transfer function of the first path and a second transfer function of the second path; and subtracting the third signal from the first signal to reduce the undesired signal in the first signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A receiver, comprising:
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a receive path configured to generate a first signal, wherein the first signal includes a desired signal and an undesired signal that results from an interfering signal being applied to a first path; a feedback receive path configured to generate a second signal from the interfering signal; processing circuitry configured to process the second signal to generate a third signal, wherein the processing circuitry is further configured to adjust the second signal based on a difference between a first transfer function of the first path and a second transfer function of the feedback receive path; and a cancellation module configured to subtract the third signal from the first signal to reduce the undesired signal in the first signal. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A receiver, comprising:
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a receive path configured to generate a first signal, wherein the first signal includes a desired signal and an undesired signal that results from an interfering signal being applied to a first path; a digital interface configured to generate a second signal from the interfering signal; processing circuitry configured to process the second signal to generate a third signal, wherein the processing circuitry is further configured to adjust the second signal based on a first transfer function of the first path; and a cancellation module configured to subtract the third signal from the first signal to reduce the undesired signal in the first signal. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification