SU1374408A1 - Adaptive filter - Google Patents

Abstract

Invention m. used to filter a signal distorted by null math noise. waiting The purpose of the invention is to increase the filtration accuracy. The filter contains a subtraction unit 1, scale and 2 and 8, limiter 3, voltage divider 4, adder 5, bi-directional bias signal generator 6, integrator 7, unit 9 block 9. 1 il.

Description

11374408

. The invention relates to radio engineering and can be used to filter a signal distorted by interference with zero expectation.

The purpose of the invention is to improve the accuracy of filtration.

The drawing shows an electrical structural diagram of an adaptive filter,

Adaptive filter contains block 1

and

kjlx (t) | k TCtT

.

where o (B is the scaling factor, arrives at the first input of the summator 5, to the other input of which the output signal of the two-threshold shaper 6 of the bias signal

(t)

In sign (t) (t) h

u, (t)

subtracting, first scale amplifier 2, limiter 3, voltage divider 4, adder 5, bi-directional bias driver 6, integrator 7, second scale amplifier 8, and module allocation module 9.

Adaptive filter works as follows.

The input signal x (t) + v (t), where x (t) is the useful signal, v (t) is the zero-average interference disturbance, is fed to the input of subtraction unit 1, to the other input of which the output signal of the integrator is 7 x (t), which is an estimate of the desired signal. The output of subtraction unit 1 (t), which is an estimate of the interference, is fed to the inputs of the first large-scale amplifier 2 and the two-threshold bias signal generator 6. The output signal of the first scale amplifier 2) k. (T) is fed to the input of the limiter 3, the output signal of the limiter 3

-K, (t) „„ .sign t (t)

with (t) with k, l (t)

The second input is supplied to the divider 4, to another input of which the signal Ug (t) kj | x (t) tc of the output of the block 9 of the module’s output arrives as a dividend; to the input of which the signal goes through the second large-scale amplifier 8 integrator code 7, x (t), output signal divider 4

five

0

five

0

five

0

five

The output signal of the adder 5, the equal UjCt)) + is fed to the input of the integrator 7, on the code of which the filtered signal x (t) is formed,

Claims (1)

Invention Formula An adaptive filter containing a subtractor, the first input of which is the input of an adaptive filter, the integrator whose output is the output of an adaptive filter and connected to the second input of the subtracting unit, an adder, a limiter, and the first and second large-scale amplifiers, characterized in that increase the accuracy of filtering; a voltage divider, a two-threshold Shaper signal generator and a module allocation module are inserted into it; in this case, the first large-scale amplifier and the limiter are connected in series with do the output of the subtraction unit and the first input of the voltage divider, the second input of which is connected to the output of the module's extension unit, the input of which through the second large-scale amplifier is connected to the output of the integrator, the input of which is connected to the output of the adder, the first input of which is connected to the output of the voltage divider, and the second input through a double-threshold bias shaper is connected to the output of the subtraction unit,