SU1548782A1 - Device for comparison of codes - Google Patents

Abstract

The invention relates to telecommunications and can be used in synchronization nodes of narrowband information transmission systems. The aim of the invention is to expand the field of application of the detector due to the possibility of comparing non-binary symbols. The device compares P binary code combinations, each of which contains H binary symbols. If all code combinations are different, then a single pulse signal is formed at the output of the device, otherwise it is not generated. The device contains a serial-to-parallel converter 1, a decoder 2, triggers 3, a shaper 4 pulses, a counter 5, a delay block 6 and an element 7. 7. Il.

Description

one

(21) 3986625 / 24-24

(22) 11/04/85

(46) 07.03.90. Bul № 9 (72) Yu.P.Zubkov

(53) 621.398 (088.8)

(56) Tutevich V.N. Telemechanics. -M .: Higher School, 1985, p. 253,

rice 10.14.

Shushkov E.I., Tsodikov M.B. Multichannel analog-digital converters. L .: Energie, 1975, p. 131, fig. 6-1.

(54) DEVICE FOR COMPARING CODES

(57) The invention relates to telecommunications and can be used in synchronization nodes of narrowband information transmission systems. The purpose of the invention is to expand the field of application of the detector due to the possibility of comparing non-binary symbols. The device compares P binary code combinations, each of which contains H binary symbols. If all code combinations are different, then a single pulse signal is formed at the output of the device, otherwise it is not generated. The device contains a serial-to-parallel converter 1, a decoder 2, triggers 3, a shaper 4 pulses, a counter 5, a delay block 6 and an element 7. 7. Il.

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The invention relates to telecommunications and can be used in

one

evil synchronization narrowband information transmission systems.

The purpose of the invention is to expand the scope of application of the device due to the possibility of comparing non-binary characters.

The drawing shows the functional diagram of the device. j The device contains a sequential inverter 1 in parallel, a decoder 2, triggers 3, a pulse shaper 4, a counter 5B, a delay unit 6 and an And 7 element.

The device works as follows.

Sequence from P non-binary

single, at the output of the counter 5, an overflow pulse is generated, which is fed to the input of the 6-delay unit, and to the corresponding input of the element 7. At the same time, at the output of the element 7, a single signal is generated, indicating that all P input binary combinations of H are different. After a certain time at the output of the delay unit 6, a signal appears by which all the triggers 3 are brought to the initial (zero) state.

2- situation. Not all P combinations are different. Output states of not all triggers 3 single. Therefore, at the output of the element And 7, a single signal is not formed at a certain time,

ten

15

The characters (each character represents - 20, according to the impulse delayed by block 6, the dog H is an N-digit binary code combination) is fed to the input of the device. In Converter 1, an H-digit binary code combination is converted from a serial code to a parallel one. In the driver of 4 pulses, each input H-digit combination is transformed into an output single pulse signal. In counter 5, the number of output pulsed signals from driver 4 is calculated. Each output binary combination of converter 1, decoder 2 will be left in accordance with a moving single signal at a certain output "This signal changes the state of the corresponding trigger 3 (the initial state of the trigger 3 - zero). As the H-valued binary code combinations arrive at the device input, their numbers are counted in the counter 5 and the state of the corresponding triggers 3 changes. After the last (P-) H-digit binary code combination arrives at the device input; two situations are possible.

1- situation. All P binary combinations (respectively of non-binary characters) are different. In this case, the output states of all triggers are 3 15

thirty

35

ten

45

50

replenishment of counter 5, triggers 3 are reset. The device is ready for analysis of the following P non-binary signals.

Thus, the device allows one to compare meddu a nonbinary characters represented by binary code combinations.

Claims (1)

Invention Formula The device for comparing codes, containing the trigger outputs of which are connected to the corresponding first inputs of the AND element, the output of which is the output of the device, in contrast to the fact that, in order to expand the field of application of the device due to the possibility of comparing non-binary scams, The decoder, pulse generator, counter and delay unit are entered into it, the inputs of the decoder and pulse generator are the device inputs, the outputs of the decoder are connected to the installation inputs of the respective triggers, outputs One pulse generator is connected via a counter to the input of the delay unit and the second input of the element I, the output of the block. ka delay is connected to the inputs of the settings to zero triggers. 87824 single, at the output of the counter 5, an overflow pulse is generated, which is fed to the input of the 6-delay unit, and to the corresponding input of the element 7. At the same time, at the output of the element 7, a single signal is generated, indicating that all P input binary combinations of H are different. After a certain time at the output of the delay unit 6, a signal appears by which all the triggers 3 are brought to the initial (zero) state. 2- situation. Not all P combinations are different. Output states of not all triggers 3 single. Therefore, at the output of the element And 7, a single signal is not formed at a certain time, ten 15 on delayed by block 6 pulse ne replenishment of counter 5, triggers 3 are reset. The device is ready for analysis of the following P non-binary signals. Thus, the device allows one to compare meddu a nonbinary characters represented by binary code combinations. Invention Formula The device for comparing codes, containing the trigger outputs of which are connected to the corresponding first inputs of the AND element, the output of which is the output of the device, is different from the fact that he entered the decoder, pulse shaper, counter and delay unit, the inputs of the decoder and pulse shaper are the inputs of the device, the outputs of the decoder are connected to the inputs of the unit in the unit of the corresponding triggers stroke pulse shaper is connected via a counter with an input delay unit and the second input of AND, yield Bloch. ka delay is connected to the inputs of the settings to zero triggers.