Method for reducing self-interference signal in communications system, and apparatus
First Claim
1. A wireless full duplex communications apparatus, wherein the apparatus comprises:
- a transmitter, configured to send a sounding signal and a first communication signal through at least one antenna wherein a timeslot used for sending the sounding signal is different from a timeslot used for sending the first communication signal, and the sounding signal is a large time-bandwidth product signal;
a receiver, configured to receive an input signal through at least one antenna, wherein the input signal comprises a second communication signal sent by another apparatus and an echo signal that corresponds to the sounding signal and the first communication signal; and
a processor, configured to separate a near-field reflection signal corresponding to the sounding signal from the echo signal, whereinthe processor is further configured to determine, based on the near-field reflection signal, a near-field reflection channel parameter; and
the processor is further configured to determine, based on the near-field reflection channel parameter, a reconstructed near-field reflected self-interference signal, and subtract the reconstructed near-field reflected self-interference signal from the second communication signal.
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Abstract
Embodiments of the present invention provide a method for reducing a self-interference signal in a communications system, and an apparatus. The method includes: sending a sounding signal and a first communication signal; receiving an input signal; separating a near-field reflection signal corresponding to the sounding signal from an echo signal of the input signal; determining, based on the near-field reflection signal, a near-field reflection channel parameter; determining, based on the near-field reflection channel parameter, a reconstructed near-field reflected self-interference signal; and subtracting the reconstructed near-field reflected self-interference signal from a received second communication signal. The present invention can effectively recognize and reconstruct a near-field reflection signal, thereby reducing a near-field reflected self-interference signal in self-interference.
16 Citations
13 Claims
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1. A wireless full duplex communications apparatus, wherein the apparatus comprises:
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a transmitter, configured to send a sounding signal and a first communication signal through at least one antenna wherein a timeslot used for sending the sounding signal is different from a timeslot used for sending the first communication signal, and the sounding signal is a large time-bandwidth product signal; a receiver, configured to receive an input signal through at least one antenna, wherein the input signal comprises a second communication signal sent by another apparatus and an echo signal that corresponds to the sounding signal and the first communication signal; and a processor, configured to separate a near-field reflection signal corresponding to the sounding signal from the echo signal, wherein the processor is further configured to determine, based on the near-field reflection signal, a near-field reflection channel parameter; and the processor is further configured to determine, based on the near-field reflection channel parameter, a reconstructed near-field reflected self-interference signal, and subtract the reconstructed near-field reflected self-interference signal from the second communication signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for canceling a self-interference signal in a communications system, wherein the method is executed by an apparatus supporting wireless full duplex, and the method comprises:
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sending a sounding signal and a first communication signal, wherein a timeslot used for sending the sounding signal is different from a timeslot used for sending the first communication signal, and the sounding signal is a large time-bandwidth product signal; receiving an input signal, wherein the input signal comprises a second communication signal sent by another apparatus and an echo signal that corresponds to the sounding signal and the first communication signal; separating a near-field reflection signal corresponding to the sounding signal from the echo signal; determining, based on the near-field reflection signal, a near-field reflection channel parameter; determining, based on the near-field reflection channel parameter, a reconstructed near-field reflected self-interference signal; and subtracting the reconstructed near-field reflected self-interference signal from the second communication signal, wherein the second communication signal is sent by another apparatus. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification