SU568183A1 - Coding apparatus - Google Patents

Description

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The invention relates to radio, can be used to transmit binary information via radio channels.

A coding device is known for transmitting | binary information frequency-time code on the channels of frequency and heating & dual frequency telegraphy, containing the reference frequency generator, & Dinner with frequency divider and clock distributor Ij.

However, the known device cannot ensure the operation of the information source with the standard transmitting equipment in the modes of frequency or two-channel frequency telegraphy.

The purpose of the invention is to improve the noise immunity.

To do this, in the coding device for transmitting binary information by a frequency-time code via frequency t channels, e-graphs and dual frequency telegraphy, a frequency generator, connected to a frequency divider and a clock distributor, is inserted into the coding unit, an inverter, eight

matching elements and four elements are complex, the output of the frequency divider is connected to the clock input accumulative1 h; the synchronizing unit, the output of which is connected to the first inputs of the first group of four matching elements and through the inverter to the first inputs of the second group of four matching elements, clock distributor outputs connected in parallel to the second inputs of the coincidence elements of both groups, and the outputs of all elements of the match are connected to the corresponding inputs of the elements of the addition, the outputs of which are devices are outputs. ,

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

The device contains a reference frequency generator 1 connected to a frequency divider 2 and a clock distributor 3, a cumulative synchronizing unit 4, an inverter 5, eight coincidence elements 6-13, and four addition elements 14-17. The output of frequency divider 2 is connected to the synchronizing input of the accumulative synchronization

of the connecting unit 4, the output of which is connected to the first inputs of the matching elements (9 k through the inverter 5, to the first inputs of the matching elements 10-13. The outputs of the clock of the distributor 3 are connected in parallel to the second inputs of the matching elements 613, and the departures of all the matches of the matching 1 the addition elements 14-17, the outputs of which are the outputs of the device.

The device works as follows.

Sigal from binary source 18 enters cumulative-synchronization unit 4, the second input of which is connected via frequency divider 2 to the output of reference frequency generator 1. Therefore, the information from unit 4 is read through intervals determined by reference frequency generator 1 and frequency divider 2. The frequency of the reference frequency generator is at least four times the speed of binary information. A four-way frequency divider ensures synchronous operation of the accumulation-synchronizing unit 4 and the clock section of 3, to the input of which the second output of the reference frequency generator 1 is connected. Information read from the accumulating-synchronizing unit 4 information is fed to the first inputs of the matching elements 6-9, and the first inputs of the match elements 1O-13 through the inverter 5, the second inputs of all the matching elements are connected to the outputs of the clock distributor 3, therefore, their operation is rigidly synchronized in time with the clock with binary information flows in a certain sequence. The signals from the coincidence elements 6-13 are fed to the corresponding inputs of the electronic elements 14-17 and from their outputs, which are the outputs of the encoder, to the inputs of the first and second control channels of the transmitter. On the control inputs of the perimeter & daCgczyk, the controls are thus controlled &

the information symbol is transmitted sequentially at the press and release frequencies. The encoding device described makes it possible to improve the protection of transmission of binary information against interference due to the use of the frequency separation effect and time & nor in the radio network with transmitters equipped with elements for generating signals of frequency telegraphy and two-channel clock telegraphy.

Claims (1)

1. Zayezdny A, M and Okunev Yu. B, Instrument for transmitting the high-level information MS-5, M., Sv, 1970, p. 21-30.