SU756660A1 - Device for receiving information with noise suppression - Google Patents

Description

The invention relates to communication and can be used in receivers of data transmission equipment and telegraph message transmission equipment.

A device for receiving information with interference suppression is known, which contains the first prohibition element connected between the signal source and the load unit, and the automatic transmission gain control unit connected in series, to which the source output, signals, band-pass filter, detector are connected. and threshold element.

However, the known device does not * * 15 provide high reliability of receiving information.

The purpose of the invention is to increase the reliability of receiving information.

For this purpose, a device for receiving 20 information with noise suppression, containing the first prohibition element, connected between the signal source and the load unit, and a series of automatic transmission coefficient adjustment, connected to the input of which is connected to the output of the signal source, band-pass filter, detector, and the threshold element, in series connected block

2

rhenium intensity of impulse noise, the input of which is connected to the output of the signal source, the error zone extraction unit, control unit and the second prohibition element, the output of which is connected to another input of the first prohibition element, while the auxiliary output of the automatic gain control unit is connected to another input of the control , and the output of the threshold element is connected to another input of the second prohibition element.

The drawing shows a structural electrical circuit of the proposed device.

A device for receiving information with interference suppression contains a source of 1 signals, a load unit 2, the first prohibition element 3, a block 4 automatic. adjusting the transmission coefficient, bandpass filter 5, detector b, threshold element 7, unit 8 for measuring the intensity of impulse noise, block 9 for allocating the error zone, block 10 for control and the second element 11 for prohibition.

The device works as follows.

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756660

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In the absence of interference or interruption

information from source 1 through the first element 3 freely enters the input of block 2.

; Unit 4 is used to measure the transmission coefficient when the output of source 1 shows signs of interruption or impulse noise. The output signal of block 4 when there are interruptions or impulse noise is changed so that the threshold element 7 generates a signal erase.

Unit 8 is used to measure the intensity of the impulse noise. From the output of block 8, the corresponding information about the parameter · pulse interference enters block 9, in which the time is determined

with high probability, errors are possible.

During a break, block 4 through the band-pass filter 5 and detector 6 acts on the threshold element 7 and on block 10. Threshold element 7 produces an erase signal, and block 10 in this case does not generate control pulses to the input of the second element 11. The erase signal continuously passes to another the input of the second element 11, which prevents the passage of information signals from the source 1 in block 2.

When exposed to impulse noise from the output of block 9 and from the additional output of block 4, the corresponding signals are fed to the inputs of block 10. The simultaneous presence of signals at both inputs of block 10 determines its operation so that at the output of block 10 control signals appear that occur after the end of time _{o1 !)} and are generated by block 10 during the entire time of false erase ^ PM · Since block 4 ensures the generation of an erase signal by threshold element 7 and for impulse noise, the presence of control signals at the input of the second Element 11 at the time point 7.d _С ensures the prohibition of the erase signal. Next, information from the source 1 output goes to block 2, i.e. false erasures are excluded at the moments of time immediately following the error zone.

When a break occurs _following impulse _noise , if the break is valid for a time Έ _θι11 , the appearance of a signal at the input of block 10 only from the additional output of block 4 "erases" information about the duration of time T _hp . Consequently, the device works as in the case of a break. If the break is valid for Ό _HP , then the appearance of a signal at the input of block 10 only from the additional output of block 4 stops the operation of block 10 by blocking false erasures in the second element 11. The device then works as in the case of a break.

The proposed device allows reception of discrete information. Madia as under the influence of breaks, and under the influence of impulse. noise.

Claims (1)

Claim A device for receiving information with interference suppression, containing the first prohibition element connected between the signal source and the load unit, and the automatic transmission gain control unit connected in series, the input of which is connected to the output of the signal source, band-pass filter, detector and threshold element, characterized in that In order to increase the reliability of receiving information, a series-connected unit for measuring the intensity of impulse noise is inputted, the input of which is connected to the output of the signal source unit, the allocation of the error zone, the control unit, and the second prohibition element, the output of which is connected to another input of the first prohibition element, while the additional output of the automatic gain control unit is connected to another input of the control unit, and the output of the threshold element is connected to another input the second element of the ban.