Systems and methods for non-linear digital self-interference cancellation
First Claim
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1. A system for non-linear digital self-interference cancellation comprising:
- a pre-processor communicatively coupled to a digital transmit signal of a communication system that generates a first pre-processed digital transmit signal from the digital transmit signal;
a non-linear transformer, comprising a first transform path and a second transform path, that transforms the first pre-processed digital transmit signal into a non-linear self-interference signal according to a transform configuration;
wherein the first transform path has a model component of an order specified by a first positive integer and the second transform path has a model component of an order specified by a second positive integer;
wherein the first transform path includes an upsampler that upsamples the first pre-processed digital transmit signal by a factor of the first positive integer to create an upsampled signal, a model component that generates a first non-linear self-interference signal component of an order specified by the first positive integer from the upsampled signal, a low-pass filter that removes undesired high frequency components from the first non-linear self-interference signal component, and a downsampler that downsamples the first non-linear self-interference signal component by a factor of the first positive integer;
a transform adaptor that sets the transform configuration of the non-linear transformer; and
a post-processor that combines the non-linear self-interference signal with a digital receive signal of the communication system.
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Abstract
A system and method for non-linear digital self-interference cancellation including a pre-processor that generates a first pre-processed digital transmit signal from a digital transmit signal of a full-duplex radio, a non-linear transformer that transforms the first pre-processed digital transmit signal into a non-linear self-interference signal according to a transform configuration, a transform adaptor that sets the transform configuration of the non-linear transformer, and a post-processor that combines the non-linear self-interference signal with a digital receive signal of the full-duplex radio.
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Citations
17 Claims
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1. A system for non-linear digital self-interference cancellation comprising:
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a pre-processor communicatively coupled to a digital transmit signal of a communication system that generates a first pre-processed digital transmit signal from the digital transmit signal; a non-linear transformer, comprising a first transform path and a second transform path, that transforms the first pre-processed digital transmit signal into a non-linear self-interference signal according to a transform configuration;
wherein the first transform path has a model component of an order specified by a first positive integer and the second transform path has a model component of an order specified by a second positive integer;
wherein the first transform path includes an upsampler that upsamples the first pre-processed digital transmit signal by a factor of the first positive integer to create an upsampled signal, a model component that generates a first non-linear self-interference signal component of an order specified by the first positive integer from the upsampled signal, a low-pass filter that removes undesired high frequency components from the first non-linear self-interference signal component, and a downsampler that downsamples the first non-linear self-interference signal component by a factor of the first positive integer;a transform adaptor that sets the transform configuration of the non-linear transformer; and a post-processor that combines the non-linear self-interference signal with a digital receive signal of the communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for non-linear digital self-interference cancellation comprising:
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receiving a digital transmit signal of a communication system; transforming the digital transmit signal into a non-linear self-interference signal according to a transform configuration;
wherein transforming the digital transmit signal comprises generating a first non-linear self-interference signal component and a second non-linear self-interference signal component, and combining the first and second non-linear self-interference signal components to create the non-linear self-interference signal; andcombining the non-linear self-interference signal with a digital receive signal of the communication system; wherein generating the first non-linear self-interference signal component comprises upsampling the digital transmit signal by a factor of a first integer, processing the digital transmit signal with a model component of an order specified by the first integer, filtering the digital transmit signal, and downsampling the digital transmit signal by a factor of the first integer;
wherein generating the second non-linear self-interference signal component comprises upsampling the digital transmit signal by a factor of a second integer, processing the digital transmit signal with a model component of an order specified by the second integer, filtering the digital transmit signal, and downsampling the digital transmit signal by a factor of the second integer;
wherein the first integer and the second integer are not equal. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification