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A Robust Student's t-Based Kernel Adaptive Filter
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DOI：10.1109/TCSII.2021.3074643.png)
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In this brief, a kernel adaptive filter based on the Student's t distribution in the reproducing kernel Hilbert space (RKHS) is presented, which is distinct from the traditional kernel adaptive filtering algorithms as follows: first, a Student's t reproducing kernel function is proposed to fight against the abrupt noise together with Gaussian noise depicted by the impulsive-Gaussian mixed noise model; and second, a Strengthened Surprise Criterion (SSC) is devised to reduce the size of the neural networks, which is utilized to implement the proposed Student's t-based kernel filter. The proposed algorithms are compared with the widely used KLMS and recently proposed KRLS-type filters in terms of the accuracy error under both Gaussian and abrupt noise. Experimental results show that the proposed Student's t-based kernel adaptive filter can improve the estimation accuracy at least by 20% while having more compact size of neural networks compared with the existed kernel adaptive algorithms.
Keyword:
Kernel adaptive filter
student's t distribution
reproducing kernel Hilbert space
non-Gaussian environment
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