SU866775A1 - Discrete information receiving device - Google Patents

Description

(54) DEVICE FOR RECEIVING DISCRETE INFORMATION

The invention relates to the field of ectrosis and can be used in data transmission systems with critical feedback without locking the receiver in the presence of errors in the received information. A reception device is known comprising a serially connected matching unit and a decoder, as well as a drive and a serially connected key and interface unit fll. However, the known device has a low speed of receiving information, as well as low reliability. The purpose of the invention is to increase the speed and reliability of received information. To do this, a control unit, signal generator Repeat, two address sensors, an information recording and reading unit, and a serially connected recurrent line are introduced into the discrete information receiving device containing the serially connected matching unit and decoder, as well as the accumulator and the serially connected key and interface unit. delays and the first adder unit modulo two, as well as the second modulo unit additionally connected in series two, the threshold unit and the repeat signal transmitter, the output of which This is combined with the output of the signal conditioner Request, to the input of which and the first input of the control unit the first output of the decoder is connected, and the second output of the decoder is connected to the first input of the recording and reading unit and the first input of the key, to the second input of the accumulator, to the control the inputs of which are connected to the outputs of the address sensors, and the outputs of the key are connected to the first and second inputs of the second addition unit modulo two, the second input of the recording and reading unit, the first input of the recurrence the delay line and the second input of the first addendum unit modulo two, the output of which is connected to the third input of the control unit; the output of the threshold unit is connected to the second input of the control unit, and the outputs of the control unit are connected to the second input of the decoder, the second input of the recurrent delay line, the third input of the recording and reading unit; the inputs of the address sensors and the fourth key input. The drawing shows a block diagram of the proposed device. The device contains a matching unit I, a decoder 2, a unit 3 for recording and reading information, a storage unit 4, a key 5, a recurrent delay line 6, a first modulating unit 7, two, a control unit 8, an address sensor 9, a second modifying unit 10 , threshold unit II, interface unit 12, signal generator 13 Repeat, address sensor 14, signal repetition sensor 15. The device works as follows. If there are no errors in the communication channel. Information in the form of a codogram, consisting of hi code blocks of VI each, is sent to decoder 2 through matching block 1. From the decoder 2 output, the information parts of code blocks K of binary characters each are in the original code through the unit 3, the information is recorded and read into the first zone of the accumulator 4 and simultaneously (through the public key 5) is fed to the inputs of the recurrent delay line 6 and the first addition unit 7 modulo two to form a protective total, the structure of which of the structure is determined correctly received code information blocks, wherein the sensor signals to the control unit 9 work razreschaets 8 addresses, switch 5 is opened by input unit 3 nepBCiMy recording and reading information are generated command to the information recording mode. After receiving the last code block of information from control unit 8, the sensor 9 of addresses and block 3 of recording and reading information are reset to an initial state, blocking the supply of clock frequencies to the recurrent delay line 6 for a time period equal to ii, since

The chip will generate a protective total for correctly received code blocks of information through (where b is the deceleration of the signals from the first transmission by writing them to the second zone of accumulator 4 with simultaneous marking with distorted coders in the forward and reverse channels, taking into account paraparative delays). After the expiration of the time period ft, it locks the clock frequencies to the differential delay line 6, closes the key 5 on the fifth output, and opens on the first and third inputs, with the protective total from the first block 7 modulo two and with the decoder 2 with the C symbol through key 5, the second block 1O of the addition of a motor two is applied for elementwise comparison. The sequence of zeros from the output of the second addition unit 10 modulo wa is fixed by the threshold unit 11, the signal from the output of the latter acts through the control unit 8 to the write and read unit 3, the sensor 9 of the keys, the key 5, providing the mode of reading information from the accumulator 4 through the open the first output of the key 5, block 12 of the conjugation, in the receiver information. Upon completion of the reading of the codogram from accumulator 4, all blocks of the device are reset, ensuring readiness for receiving the next codogram. If there are errors in the communication channel. The information is recorded in the drive 4, as well as the formation of a protective total for correctly received code blocks, according to the algorithm described above. If decoder 2 detects an error in the code block, it allows the signal generator 13 to work. Reshoot from the output: |: O signal. Reshoot is sent to the input of the communication channel and simultaneously, via the control unit 8, closes the key 5 via the first input, through the write and read unit 3 writes a single signal (marker) to drive 4 before the first position of the distorted code block. Thus, in the process of receiving a codogram, all correctly received code blocks will be recorded in the first zone of accumulator 4, and the positions of the distorted code blocks will be marked by recording signals to the marker. If the outcome of the protection totals is positive after the first reception of the codogram (i.e. there are no undetected errors in correctly received code blocks of information), the second reception in the manner described only of the distorted code block blocks. This mode differs from the first reception only in that from the control unit 8 the operation of the address sensor 14 is permitted. If the outcome of the protection totals is positive, a third reception is organized after the second reception and at the same time, at the speed T-- (where N is the information transfer rate in the communication channel), a census is taken of correctly received code blocks from

the second reception from the second zone of the accumulator 4 to its first zone through the open on the fourth output key 5 and block 3 of recording and reading information, erasing the marker signals at the insertion points of the correct code blocks, etc. until all the marked code points of the distorted code blocks after the first reception in the first zone of drive 4 are recorded correctly received code blocks of information. Then the codogram from the first zone of accumulator 4 is output to the receiver. If at any of the reception modes, for example, the first one, when the protective totals are not compared, the signal block is generated from the threshold unit 11, through which the signal 15 of the repetition signal is triggered, the repetitive transmission signal issuing to the communication channel. In case of incomparison of the protective total, formed on correctly received code blocks from the first reception, the transmitting station produces the combustion of the entire codogram. In the case of a non-comparison of the guard total from the second reception, only code blocks distorted from the first transmission are re-transmitted; in case of non-comparison of the protective total from the third reception, the code blocks are re-transmitted, distorted from the second transmission, etc.

Thus, a codogram is re-transmitted completely only if there is an undetected error from the first reception.

If there is an undetected error from the second, third, etc. receptions, only distorted code blocks are repeated in previous transmissions.

The proposed device works without blocking information on the repetition cycle in the presence of distorted code blocks; the correction of an undetected error is made by retransmitting not the entire codogram, but the part of its volume in which it is detected, which provides an increase in the efficiency of use of the communication channel, besides completely

eliminates insertions and steps in the information while increasing the reliability of information by 3-4 times by comparing the protective totals after each communication session.

Claims (1)

Invention Formula A device for receiving discrete information containing a serially connected matching unit and a decoder, as well as a drive and serially connected 1S and an interface block, characterized in that, in order to increase the speed and reliability of the received information, a control unit was inserted, a signal generator Repeated, two address sensors , a unit for recording and reading information and connected in series recurrent delay line and a first modulo-two addition unit, as well as serially connected second unit Modulo two, a threshold unit and a replay transmission sensor, the output of which is combined with the output of the signal conditioner Responsive, the first output of the decoder is connected to the input and the first input of the control unit, and the second output of the decoder is connected to the first input of the recording and reading unit and the first the key input, to the second input of which the output of the accumulator is connected, to the control inputs of which the outputs of the address sensors are connected, and the outputs of the key are connected to the first and second inputs of the second adder modulo d Va, the second input of the recording and reading unit, the first input of the recurrent delay line and the second input of the first addition unit modulo two, the output of which is connected to the third input of the key, while the output of the threshold unit is connected to the second input of the control unit and the outputs of the control unit are connected to the second input of the decoder, the second input of the recurrent delay pause, the third input of the recording and reading unit, the inputs of the address sensors and the fourth key input. Sources of information taken into account in the examination 1, USSR Author's Certificate no. 569O43, cl. H 04 L 17/16, l975. (prototype).