Self-adaption interference cancellation method and device for improving cancellation bandwidth

An interference cancellation and self-adaptive technology, applied in transmission noise suppression, electrical components, transmission systems, etc., to improve the suppression ratio, solve the suppression problem, and ensure the effect of normal operation at the same time

Inactive Publication Date: 2013-04-24
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, this design method can only be applied to the cancellation of narrowband interference signals, and the cancellation effect for broadband interference signals is not ideal, especially the suppression of sideband signals is relatively low

Method used

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  • Self-adaption interference cancellation method and device for improving cancellation bandwidth
  • Self-adaption interference cancellation method and device for improving cancellation bandwidth

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Embodiment Construction

[0050] The adaptive cancellation system includes: phase shifter, adjustable attenuator, correlator, coupler and combiner. There are two adjustable attenuators, correlators and couplers respectively.

[0051] The input of the phase shifter is connected with the time delayer, and the output of the two orthogonal paths is respectively connected with the correlation weighting subsystem of the I path and the correlation weighting subsystem of the Q path. The I-way correlation weighting subsystem includes the first adjustable attenuator and the first correlator; the Q-way correlation weighting subsystem includes the second adjustable attenuator and the second correlator, the two systems work in the same way, and the phase shifter realizes Orthogonal decomposition of the input signal, the output is two equal-amplitude quadrature signals.

[0052] The input of the first and second adjustable attenuators are connected with the output of the phase shifter, and the output is connected w...

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PUM

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Abstract

The invention provides a self-adaption interference cancellation method and a device for improving cancellation bandwidth. The self-adaption interference cancellation method and the device for improving cancellation bandwidth comprise two parts of a delay link and a self-adaption cancellation system. The self-adaption cancellation system is used for producing signals which are amplitude-constant and direction-opposite to interference signals received by a receiving system. The delay link is used for matching with and disturbing the delay between a coupling channel and a cancellation channel, so that a cancellation bandwidth is enlarged.

Description

[0001] Technical field: [0002] The invention relates to an electromagnetic compatibility technology, in particular to an adaptive interference cancellation method and device for increasing the cancellation bandwidth, and belongs to the field of electromagnetic interference suppression. [0003] Background technique: [0004] The coupling interference problem between common platform communication systems becomes more and more serious with the increase of electronic equipment. Due to limited platform space, there is limited isolation. The time-division and frequency-division work has seriously affected the overall performance of the electronic information system. In order to enable the system to transmit and receive at the same time and maximize the performance of the system, interference cancellation technology can be used to solve the problem. The theoretical basis of adaptive interference cancellation is adaptive noise cancellation technology. To solve the problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B15/00H04B1/10
Inventor 蒋云昊
Owner NANJING UNIV OF INFORMATION SCI & TECH
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