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Robust deviation compensation self-adaptive filter and filtering method thereof

An adaptive filter and bias technology, applied in the direction of adaptive network, impedance network, electrical components, etc., can solve the problems of inability to obtain convergence performance and estimation bias, and achieve the effect of eliminating estimation bias and improving performance.

Active Publication Date: 2018-01-16
SUZHOU UNIV
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Problems solved by technology

If the SE-LMS adaptive filter is used to estimate the weight vector of the unknown system, there will be an estimation bias, so that good convergence performance cannot be obtained

Method used

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  • Robust deviation compensation self-adaptive filter and filtering method thereof
  • Robust deviation compensation self-adaptive filter and filtering method thereof

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Embodiment

[0029] In this embodiment, the convergence speed and steady-state imbalance of the LMS adaptive filter, the SE-LMS adaptive filter and the BC-SE-LMS disclosed in the present invention are compared by means of computer experiments.

[0030] A. Experimental conditions:

[0031] input signal u n Gaussian white noise with zero mean and its variance is Measurement noise is given by z(n) by Gaussian white noise v n and interference noise ρ n synthesis, where v n The variance of Impulse noise ρ n by Bernoulli process and a Gaussian process t n The product of The probability distribution of the Bernoulli sequence satisfies The signal-to-interference ratio is taken as -30dB. Input noise η n Gaussian white noise with zero mean and variance Signal-to-Noise Ratio of Input Signal The weight vector of the unknown system is taken as w o =[0.8,0.1,0.6,0.3,0.2,0.5,-0.7,-0.2,-0.3] T .

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Abstract

The invention discloses a robust deviation compensation self-adaptive filter and a filtering method thereof, and belongs to the field of design of digital filters. The robustness of the self-adaptivefilter is kept under the influence of input noise and pulse noise by main utilization of a deviation compensation method and a symbolic operation method; the deviation compensation method can be utilized for inhibiting influence of the input noise on an unknown system; the symbolic operation method can be utilized for reducing influence of the pulse noise on the unknown system; and thus, the deviation compensation self-adaptive filter can be applied to electronic and communication equipment having input noise and interference pulse.

Description

technical field [0001] The invention discloses a deviation compensation self-adaptive filter and a filtering method thereof, belonging to the field of digital filter design. Background technique [0002] Traditional LMS and NLMS adaptive filters have a wide range of applications in adaptive filters, such as adaptive echo cancellation, active noise control and adaptive noise cancellation. [0003] Convergence speed, steady-state misadjustment and anti-pulse interference ability are three important performance indicators of adaptive filter. The level of steady-state misalignment determines the accuracy that the adaptive filter can achieve in approaching the unknown system, and the speed of convergence determines the time it takes for the adaptive filter to approach the unknown system. The ability to resist pulse interference determines the robustness of the adaptive filter. Stickiness, these three indicators affect the quality of signal processing at the same time. [0004] ...

Claims

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Application Information

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IPC IPC(8): H03H21/00
Inventor 倪锦根高烨
Owner SUZHOU UNIV
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