发明名称 |
Method of and apparatus for identifying a system with adaptive filter. |
摘要 |
<p>A method of and an apparatus for identifying a system which allow a filter coefficient to be updated accurately even if noise is mixed. The apparatus for identifying a system includes an adaptive filter (101) for processing a reference input signal to produce an output signal, a subtractor (102) for subtracting the output signal of the adaptive filter from an observed signal, a power estimating circuit (103) for estimating the power of the reference input signal, and a step size determining circuit (104) for determining a step size based on the estimated power of the reference input signal. The step size determining circuit generates a step size according to a function of the power of the reference input signal which monotonously increases if the power of the reference input signal is smaller than a threshold and monotonously decreases if the power of the reference input signal is greater than the threshold. <IMAGE></p> |
申请公布号 |
EP0661832(A2) |
申请公布日期 |
1995.07.05 |
申请号 |
EP19940120565 |
申请日期 |
1994.12.23 |
申请人 |
NEC CORPORATION |
发明人 |
HIRANO, AKIHIRO, C/O NEC CORPORATION |
分类号 |
H03H15/00;H03H17/00;H03H21/00;H04B3/23;H04M9/08;(IPC1-7):H04B3/23 |
主分类号 |
H03H15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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