SU822225A2 - Signal receiver - Google Patents

Description

The invention relates to discrete information receiving devices used in telecontrol and communication systems.

According to the main author St., No. 734383 known. a device for receiving signals used in direct channel receivers of data transmission systems with information feedback. This device. According to a certain rule, distinguishes false combinations of the erase sign from the true ones. The device for receiving signals contains series-connected memory blocks, the input of the first of which is connected to the input of the device, a control unit, the first and second outputs of which are connected respectively to the first inputs of the first analyzer and the first managed key, the output of which is connected to the first input of the decoder, the output of which is connected to the first output of the device, the control outputs of the first three memory blocks are connected to the corresponding inputs of the control unit, the first output of which is connected to the second inputs of of the fourth and fifth memory blocks, the second outputs of the sixth, seventh, eighth and ninth memory blocks are connected respectively to the first inputs of additional controlled keys, the outputs of which are connected to the corresponding inputs of the decoder, the third outputs of the sixth, seventh, eighth and ninth memory blocks are connected to the second inputs of the corresponding analyzers, the first output of each analyzer is connected to the second input of the corresponding managed key and to the first input of the subsequent dialyzer, the second output of the first analyzer The ora is connected to the second inputs of the seventh and eighth memory blocks and to the third input of the last analyzer [1].

The disadvantages of this invention include the fact that at high levels of noise in the channel, the code combinations of the message are relatively often converted to the service sign combination, which leads to memory overflow and, consequently, to errors in receiving signals. Errors of this kind can be reduced by increasing the number of storage devices, but an "excessive increase in their number leads to a decrease in the reliability of the device, an increase in size, etc.

The purpose of the invention is to increase the noise immunity of the device.

This goal is achieved by the fact that a switch, a control signal generator, an element And and a status indicator of the memory unit are inserted into the device for receiving signals, the third and fourth outputs of the control unit are connected respectively to the first input of the switch and to the first input of the element And, the fourth output of one of the blocks the memory is connected through a status indicator of the memory unit to the second input of the element And, the output of which through the control signal generator is connected to the second input of the switch, the output of the switch is connected to the second output device.

The drawing shows a block diagram of a device ..

The circuit of the device for receiving signals consists of memory units 1-9, control unit 10, analyzers 1114, controlled keys 15-19, decoder 20, switch 21, element 22, status indicator 23 of the memory unit and control signal generator 24.

The device operates as follows.

When the device registers false erasures, information from the memory unit 1 advances to the memory blocks with large numbers. As soon as the code combination fills the control block 6 of the memory, the indicator 23 generates a pulse that is supplied to one of the inputs of the element And 22. The signal from the control unit 10 is received at the other input of the element And 22, when the last one fixes the code combination of the erase sign in the block 1 of the memory. Element And 22 generates a pulse that triggers the generator 24 of the control signal. Generator. 24 forms a code combination, which through the switch 21 is fed to the second output of the device to the transmitter of the reverse channel.

Since in the discrete information transmission system including the proposed device in the forward channel receiver, the service code combination is not acknowledged, the return channel receiver switches to receiving the control signal immediately after the erase sign is transmitted by the forward channel transmitter.

Having received the control signal, the direct channel station changes the operating mode of its transmitter (for example, increasing the output power), which leads to the operation of the false erasure analyzer.

Using the invention allows to increase the noise immunity of a system for transmitting discrete information without increasing the amount of memory of the device for receiving signals.

Claims (1)

(54) DEVICE TO RECEIVE SIGNALS. The purpose of the invention is to improve the noise immunity of the device. This goal is achieved by introducing a switch, a control signal generator, an AND element and a memory block status indicator into the signal receiving device, the third and fourth outputs of the control block are connected respectively to the first input of the switch and to the first input of the AND element , the fourth output of one of the memory blocks is connected via the state indicator of the PGIm block with the second input of the element I, the output of which through the control signal generator is connected to the second by the input of the switch, the output of the switch is connected to v eye output device. The drawing shows a block diagram of the device. The device circuit for receiving signals consists of memory blocks 1-9, a control unit 10, analyzers 1-14, controllable keys 15-19, a decoder 20, a switch 21, an element I22, a memory unit status indicator 23 and a control generator 24 signal. The device works as follows. : When a device registers false erasures, information from memory block 1 is advanced to a block of memory with large numbers. As soon as the code combination fills up the memory control unit 6, the indicator 23 generates a pulse, which is applied to one of the inputs of the AND 22 element. The other input of the AND 22 element receives a signal from the control unit 10 when "the latter detects in code 1 memory the combination of the erase sign Element I 22 generates a pulse that triggers the control signal generator 24. The generator 24 forms a code combination, which through the switch 21 is fed to the second output of the device to the reverse channel transmitter. Since, in the discrete information transmission system including the proposed device in the forward channel receiver, the service character code is not acknowledged, the reverse channel receiver switches to receive the control signal immediately after the erase character is transmitted by the forward channel transmitter. Upon receiving a control signal, the forward channel station changes the mode of operation of its transmitter (for example, by increasing the output power), which triggers the spurious erasure analyzer. The use of the invention makes it possible to increase the noise immunity of a discrete information transmission system without increasing the memory capacity of the device for receiving signals. Claims An apparatus for receiving signals from the author 734783, characterized in that / in order to increase the noise immunity of the device, a switch, a control signal generator, an AND element and a memory block status indicator are entered, the third and fourth control block outputs are connected to the first switch input and the first input, respectively element: And, the fourth output of one of the memory blocks is connected via the state indicator of the memory block to the second input of the element I, the output of which through the generator of the control signal is connected to the second input of the switch, the output of the switch is connected to the second output of the device. Sources, information taken into account in the examination 1. USSR author's certificate 734783, cl. G 08 C 19/28, 09.11.77.