SU1341724A2 - Device for automatic sampling of channels by time distortion of binary signals - Google Patents

Abstract

The invention relates to radio and is complementary to the invention according to the author. St. No. 647872. The purpose of the invention is to increase the reliability of channel selection. The device contains two channels 1 and 2, each of which consists of a distortion meter 3, a regenerator 4, a counter 5, an analyzer 6 and a switch 7, a frequency divider 8, an executive switching node 9, an AND-10 element, an indicator 11 and a key 12. Regenerators; 4 restore the corrupted orders and control the operation of the meters 3. The meters 3 measure and convert the temporal distortion of each parcel into a number-pulse code, which through the switch 7 enters the counter 5. The counter 5 of the channel in which the stations are affected overflows faster large temporal distortion, or a faulty channel. An overflow pulse from its output sets in O the counter 5 of another channel and switches the node 9 so that the regenerator 4 of the working channel or channel in which the parcels are subject to less distortion is connected to the output. By introducing blocks 10-12, it is impossible to connect if faulty both channels or information are not received. 1 il. (L N)

Description

1341724

The invention relates to the radio in the use of the account

25

and and can be used in radios.

The purpose of the invention is to increase the channel selection channel.

The drawing shows the structure of the electrical circuit of the device.

A device for automatic channel selection will contain in each of channels 1 and 2 a distortion meter 3, a regenerator 4, a counter 5, an analyzer 6, a switch 7, as well as a frequency divider 8, switching green 9, I-NE element 10, indicator 11 and 15 Key 12.

The device works as follows.

The inputs of the distortion testers 3 and the regenerators 4 channels 1 and 2 through 20 are preceded by binary premises, distorted by interference acting in the communication channel. The number of solid zeros or single bits in an information signal is limited by the number K, depending on the structure of the code and the methods for its recovery. In synchronous reception, it is also limited by the minimum permissible adjustment frequency in the phase synchronization system of the regenerator 4, since the adjustment is made only on the transitions of the parcels. Restored dressings from the output of the regenerator 4 are fed to the input of the analyzer 6t completely zero zero or 35 e, and at the same time.

When in the incoming signal or noise (in the absence of a signal or with strong interference) the number of continuous 40 or single parcels is less than m, at the outputs of analyzers 6 there is a zero potential, under the influence of which, through switches 7, the outputs of meters 45 are connected 3 distortions. The regenerators 4 restore the distorted dressings and control the operation of the 3 distortion meters. For this, control outputs are supplied from the outputs of the regenerators 4 to the control inputs of the distortion meters 3.

The distortion meters 3 measure and transform the temporal distortion values of each parcel gg into a pulse number code, which through the switches 7 enters the counters 5 switched on according to the circuit with mutual reset.

five

0 0 5

0 5 0

g

The number of pulses entering the counter 5 from the outputs of the meters 3 is directly proportional to the amount of temporal distortions of the feed in each of the channels. At the same time, the channel counter 5 overflows more quickly in which the bills are subject to large temporal distortions. Overflow pulses from its output are set to O the counter 5 of another channel and switch the switching switching unit 9 so that the regenerator 4 is connected to the output, in which powders are subject to less distortion.

If there are only noises or information signals in the channel, which are largely affected by interference, then the regenerator 4 turns them into chaotic binary sequences, in which the number of merged K7t messages. Such an unmodulated signal, for which, the information does not carry and should not be chosen.

If, as a result of interference or as a result of a radio receiver failure, the input of one of the channels receives a zero or a single potential of duration m and a bit more, the distortion meter 3 included in this channel records the smallest temporal distortion, since corresponds to the reception of undistorted merged zero or unitary suck. In order for the device not to select this faulty channel or a channel subject to a large impact of interference, serially connected analyzer 6 continuous zero or single feeds and a switch 7 connected between distortion meters 3 and counters 5 are connected to the output of the regenerator 4.

When a channel of zero or a single potential of length w and more bursts arrives at the input of the analyzer 6, a single potential appears at the output of which the switch 7 disconnects the distortion meter 3 from the input of the counter 5 and connects the output of the frequency divider 8 to it two. At the same time, in counter 5, during the duration of each elementary postion from the output of the N / 2 pulse frequency divider, which, with the discrete-integral reception method, corresponds to the maximum distortion of the received postern (N is the number of gating

313417

pulses per elementary cell duration), if the number of merged HyneBlix or single parcels is large enough, the counter 5 of the faulty channel or the channel that is more susceptible to more interference interferes. An overflow pulse from its output sets the counter 5 of another channel and switches node 9

nerator 4 of a healthy channel or a channel subject to less interference.

In the event that information signals are disturbed, interference in both channels 1 and 2 or in the case of failure of the radio receivers of both channels at the outputs of regenerators 4 appears chaotic sequences that do not carry information and have the number of merged messages. Then, at the outputs of analyzers 6, single potentials appear. The counters 5 receive pulses from the output of the splitter 8 frequency. At that, the counter 5 of that channel, in which there was a strong interference or the radio receiver failed earlier (we will offer this channel 1), overflows faster.

An overflow pulse from its output sets in O the counter 5 of another channel and switches the node 9 of the executive, switching, so that its output receives a sequence of messages from the output of the regenerator 4 of this channel (in this case channel 2), which is also not received

.Editor I. Casarda

Compiled by T. Kolpikova

Tehred I.Popovich Proofreader M. Sharoshi

Order 4445/57 Circulation 638 Subscription

VNIIPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

 Production and printing company, Uzhgorod, st. Project, 4

five

0 5 o

0

five

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saves information. Therefore, this signal should not be selected.

Claims (1)

The unit potentials from the outputs of the analyzers 6 of channels 1 and 2 are fed to the first and second inputs, respectively, of the NAND element 10, at the output of which a potential of zero appears. The latter arrives at indicator 11 and turns on the signal from Avariya, to the control input of the key 12, which is locked and prohibits the passage of a chaotic sequence of packages containing no information to the output of the device. In addition, the zero potential from the output of the NAND 10 element is fed to the control inputs of the regenerators 4 of both channels. The synchronization band of the regenerators is expanded, which ensures that the phase synchronization system of the regenerators is quickly synchronized when information signals appear in one or both channels. Invention Formula A device for automatic channel selection based on temporary distortions of binary signals according to aut. St. No. 647872, characterized in that, in order to increase the reliability of channel selection, an indicator and a series-connected AND-NOT element and a key are entered, the information input of which is connected to the output of the switching switching node, the output of the AND-NOT element being connected to the indicator input and an additional input of the regenerator of each channel, and the inputs of the element AND-NOT connected to the outputs of the analyzers of the respective channels.