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提出一种新的自适应算法估计被噪声污染的正弦波信号的频率，依据IIR窄带滤波器和自适应FIR滤波器的级联，形成快速有效的自适应算法。
In this paper, based on a narrow IIR BPF cascaded by an adaptive FIR filter, a novel fast adaptive algorithm for sinusoid frequency detection in noisy environment is depicted.
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