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Method and device for self-interference cancellation

A jamming, clean technology for multiple use of transmission paths, digital transmission systems, electrical components, etc., to solve problems such as expensive solutions

Active Publication Date: 2021-08-17
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While special duplexing circuits may be effective in sufficiently isolating the receive chain from the transmit chain, this can be an expensive solution and is therefore undesirable for many manufacturers

Method used

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  • Method and device for self-interference cancellation
  • Method and device for self-interference cancellation
  • Method and device for self-interference cancellation

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0173] Example 1 is a method of performing interference cancellation comprising: separately applying a kernel-dimensional filter and a delay-tap-dimensional filter to an input signal of an amplifier to obtain an estimated interference signal; subtracting the estimated interfering with a signal to obtain a clean signal; and alternating between updating the kernel dimension filter with the clean signal and updating the delay tap dimension filter.

[0174] In Example 2, the subject matter as described in Example 1 can optionally include wherein separately applying the kernel-dimensional filter and the delay-tap-dimensional filter to an input signal of an amplifier to obtain an estimated interfering signal comprises : processing the input signal to derive a plurality of kernel signals from the input signal, wherein each kernel signal of the plurality of kernel signals approximates a non-linear component of the amplifier's response, and separately divides the kernel A dimensional f...

example 34

[0206] Example 34 is a communication circuit arrangement configured to: perform the method of any one of Examples 1-33.

[0207] In Example 35, the subject matter of Example 34 may optionally be configured as a radio communication device.

example 36

[0208] Example 36 is a non-transitory computer readable medium storing instructions that, when executed by a controller of a radio communications device, direct the radio communications device to perform the method of any one of Examples 1 to 33 .

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Abstract

A communication circuit arrangement comprising: a signal path circuit configured to: separately apply a kernel dimensional filter and a delay tap dimensional filter to an input signal of an amplifier to obtain an estimated interfering signal; a cancellation circuit configured to: The estimated interfering signal is subtracted from the received signal to obtain a clean signal; and a filter update circuit configured to alternate between updating the kernel dimension filter and the delay tap dimension filter with the clean signal.

Description

technical field [0001] Various embodiments relate generally to methods and apparatus for self-interference cancellation. Background technique [0002] Interference cancellation is seen as a key enabler of full-duplex radio communications. Because these full-duplex radios typically transmit and receive simultaneously on a shared antenna, interference can leak from the transmit chain to the receive chain via the duplex circuit connected to the antenna, thereby creating self-interference in the signal received by the receive chain. While special duplexing circuitry may be effective in sufficiently isolating the receive chain from the transmit chain, this may be an expensive solution and is therefore undesirable for many manufacturers. [0003] Digital self-interference cancellation can thus provide a lower cost alternative solution. In such self-interference cancellation solutions, one or more adaptive filters can be utilized to model the leakage path from the transmit chain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/525
CPCH04B1/525H04B1/44H04B15/00H04L5/1461H04B1/48H04B7/0413
Inventor C-E·李C-H·陈薛峰叶书苹
Owner APPLE INC