An adaptive filter with variable weight length and a LMS algorithm of variable step size and variable weight length are presented.

提出了变阶自适应滤波器和一种变步长变阶自适应LMS算法。

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Because word-length of register is finite. It is necessary to consider the question about the finite word-length effect during the devising digit filter.

由于寄存器的字长是有限的，因此要在数字滤波器的设计过程中考虑各种有限字长效应问题。

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The results show that a longer feedback filter tap-length is not necessarily better when the feedforward filter tap-length converges to a certain range and the decision delay maintains a fixed value.

结果表明：变长自适应判决反馈均衡器在前馈滤波器长度收敛到一定的范围内、判决延迟保持一定的情况下，反馈长度并不是越长越好。

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The results show that a longer feedback filter tap-length is not necessarily better when the feedforward filter tap-length converges to a certain range and the decision delay maintains a fixed value.

结果表明：变长自适应判决反馈均衡器在前馈滤波器长度收敛到一定的范围内、判决延迟保持一定的情况下，反馈长度并不是越长越好。

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