Non-linear digital filtering method for handling binary noise
A technology of noise filtering and digital filtering, applied in the direction of digital technology network, electrical components, impedance network, etc., can solve problems such as aging and environmental factors
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[0014] Referring first to Fig. 2, it is a schematic diagram for filtering out low-level noise in the present invention, and it is mainly provided with a low-level noise filtering device 30, which includes a digital filter H 1 (Z) 10 and a limiter 13, wherein the digital filter H 1 The input / output relationship of (Z)10 is as follows:
[0015] the y 1 (n) = 1 / 4x 1 (n)+1 / 2y 1 (n-1)+1 / 4y 1 (n-2);
[0016] where x 1 (n)11 is the input signal obtained by sampling, y 1 (n)12 is the output signal; in addition, in H 1 (Z) 10 is followed by a limiter 13 whose levels are 0 and A, and the threshold value (Threshold) of the limiter 13 is set to αA, where 0.5<α<1.
[0017] An example is as follows: If the input signal x is disturbed by noise 1 When (n)11 is {0, 0, 0, 0, A, A, 0, 0, 0, 0}, it is assumed that the starting time is n=0, that is, x 1 (0)=0,x 1 (1)=0, and so on; where x 1 (4)=x 1 (5)=A is hypothetical low-level noise, under the condition of initial condition y(-1)=y...
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