SU1015507A1 - Phase difference manipulator - Google Patents

Abstract

The phase-shift manipulator containing the first frequency divider, the output of which is connected to the input of the first pulse shaper, the output of which is connected to the first inputs of the first and second elements And and. the decoder, the second input of which is connected to the output of the second element I, the second output of which is connected to the first output of the first trigger, the input of which is connected to the output of the first element AND, as well as the generator, the first switch and the serially connected first inverter whose input is connected to the first the input of the first key, and the second key, the second input and the output of which are connected respectively to the first output of the decoder and to the output of the first key, the second input of which is connected to the second output of the decoder, which is That is, in order to reduce the bandwidth occupied by the signal in the transmission line, the second and third frequency dividers, the third and fourth keys, and the second inverter are introduced. the third and fourth elements are AND, the second trigger and the next connected fourth frequency divider and the second pulse shaper, the output of which is connected to the third input of the decoder, the second input of which is connected to the first input of the second trigger, the second input and output of which are connected to the output The third element And with the first input of the fourth element And, the second input of which is connected to the first input of the third element And, the second input of which is coherence with the second output of the first trigger, and the first input of the desh if it is connected to the fourth input of which the output of the fourth element is And, (L and the output of the master oscillator о is connected to the inputs of the second and third frequency dividers, the outputs of which are connected respectively to & the first input of the first key and to the first input the third key, to the second input of which the third output of the decoder is connected, the fourth output of which is connected to the first input of the fourth key, to the second sd input of which the output of the second inverter is connected, the input of which is connected to the first input of the third to Key, the output of which is connected to. the output of the fourth key and the output of the first key, the first input of which is connected to the inputs of the first and fourth frequency dividers.

Description

The invention relates to communication technology and can be used in telegraph systems to form phase-shift keyed signals with orthogonal symbols. Known phase difference manipulator containing the first frequency divider, the output of which is connected to the input of the first pulse shaper, the output of which is connected to the first inputs of the first and second And elements and the decoder, the second input of which is connected to the output of the second And elements, which is connected to the second input the first output of the first trigger, whose input is connected to the output of the first element, AND, as well as the master oscillator, the first cell and the inverter connected in series, the input of which is connected to the first input of the first cell There is a key and a key, the second input and output of which are connected respectively to the first output of the decoder and to the output of the first key, the second input of which is connected to the second output of the decoder C13. However, the known phase difference manipulator has a large width of the frequency band occupied by the signal in the transmission line. The purpose of the invention is to reduce the bandwidth occupied by the signal in the transmission line. The goal is achieved by the fact that the phase difference manipulator contains the first frequency divider, the output of which is connected to the input of the first pulse shaper, the output of which is connected to the first inputs of the first and second And elements and the decoder, the second input of which is connected to the output of the second element And the second input of which is connected to the first VELCOD of the first trigger / input of which soy is dinen with. the output of the element I and the master oscillator, the first key and the first inverter connected in series, the input of which is connected to the first input of the first key and the second key, the second input and output of which are connected respectively to the first output of the decoder and the output of the first key, the second input which: connected to the second output of the decoder, the second and third frequency dividers, the third and fourth keys, the second inverter, the third and fourth And elements, the second trigger and the fourth frequency divider connected in series s and the second pulse shaper, the output of which is connected to the third input of the decoder, the second input of which is connected to the first input of the second trigger, the second input and output of which are connected respectively to the output of the third And element and the first input of the fourth And element, the second input of which is connected with the first input of the third element I, the second input of which is connected to the second output of the first trigger, and with the first input of the decoder, to the fourth input of which the output of the fourth element I is connected, the output of the master gener The mouth is connected to the inputs of the second and third frequency dividers, the outputs of which are connected respectively to the first input of the first key and to the first input of the third key, to the second input of which the third output of the decoder is connected, the fourth output of which is connected to the first input of the fourth key, to the second input of which is connected the output of the second inverter, the input of which is connected to the first input of the third key, the output of which is connected to the output of the fourth key and to the output of the first key, the first input of which is connected to the inputs of the first and fourth frequency dividers. Figure 1 shows the structure on the electrical circuit of the proposed manipulator; Fig. 2 illustrates stress plots showing its operation. The phase-difference manipulator contains a master oscillator 1, the first key 2, the first inverter 3, the first divider 4 frequencies, the first and second drivers 5 and 6 pulses, respectively, the second inverter 7, the second key 8, the decoder 9, the first and second elements And 10 and 11 respectively, the first and second triggers 12 and 13, respectively, the second, third and fourth frequency dividers 14-16, respectively, the third and fourth keys 17 and 18, respectively, the third and fourth elements AND 19 and 20, respectively .. The FBR works as follows. The oscillation of the initial frequency f (Fig. 2a) from the output of the master oscillator 1 is supplied to the third frequency divider 15 by 2m and to the second frequency divider 14 by 2mtl, the outputs of which oscillate (Fig. 26) respectively the frequencies f. 2 ° v (fig. 2b, in another embodiment, it is possible to create oscillations of the frequency f „7 v) The oscillations of the frequencies f and f2, respectively, through the third key 17 and the first key 2 arrive at the output of the phase difference manipulator, which is also received via the fourth key, respectively 18 and the second switch 8 are inverted by the inverters 7 and 3 of the same frequencies (FIG. 2d and FIG. 2d). In this way, all the keys are controlled by the decoder 9 in such a way / that only one key / is open at any time and the rest are closed. The oscillations of the frequency fo transform the first divider 4 frequencies by the fourth and the fourth divider 16 frequencies by 2 tons into the oscillations respectively of the frequency. , n, (2t-1) (fig.2e) and 4 2mfm-l) rye arrive at the first and second formers 5 and 6, respectively, where short positive pulses are produced at the moments of passing through the oscillation phase through O, respectively on fig.2z, and and to (relative to fluctuations h asttoty fj). If the sequence of pulses from the output of the first shaper 5 (Fig. 2k) determines the operation of the decoder 9 and all elements 10, 11, 20, and 19, then the pulse sequence from the output of the second shaper b (Fig.2l) is informational decoder 9. An input binary signal (Fig. 2m causes the passage of pulses of a sequence (Fig. 2k) through the first element I 10 to the counting input of the first trigger 12 in the form of a sequence of pulses (Fig. 2i). Each pulse of the sequence (fign) throws the first mp the year 12 is in the opposite state, and the current state of this trigger using the second Cement AND 11 and the third element AND 19 is consistently overwritten into the second trigger (Fig. 2o and 2n, Fig. 2p and 2c) And C (Fig. 2p is informational for the decoder 9. Another information sequence of pulses (iFx.2 y) for the decoder 9 are the pulses of the sequence (Fig. 2k) /. Which pass or do not pass through fourth element and 20 depending on the state of the second trig Hera: 13 (Fig, 2 Decoder 9 works as follows. At its information inputs, the combination 000 indicates that at the first input — the first position of the combination symbol — there is no short positive impulse in this cycle / at the second input the second position, the character in the combination also lacks a short positive impulse, and finally , at the third input - the third position of the symbol in combination in this cycle there is also no short positive pulse. The first, second and third inputs of the decoder 9 receive pulse sequences from the outputs of the second one, respectively. And 11 / second driver 6 pulses and fourth element And 20 elements. In this cycle, at the output of the decoder: 9, indicated by the combination 000, a positive potential appears, opening the corresponding first key, and at all other outputs, indicated by the combinations 001, 010 , OH, ..., 111, - low potential, closing other keys. If there is a short positive pulse in this cycle, only at the second input of the decoder 9 a high potential appears at the output, indicated by the combination 010, while at others the potential is low, etc. Vsegr eight outputs of the decoder 9 are pairwise paired and connected to the four keys in such a way that eliminates the phase discontinuity in the output signal of the manipulator (fig.2sh). The key-controlling signals are shown in Fig.2.2, X, c and h. Thus, the proposed phase difference manipulator allows forming phase-modulated signals with orthogonal symbols, in which not only there is no reverse effect, but there is no phase discontinuity borders of characters. The latter provides the minimum possible width of the frequency band occupied by the output signal of the manipulator while maintaining its bandwidth / but with a delay of information by time / equal to the duration of the transition process in the trigger. The appearance of an additional chitote f in the output signal of the manipulator, along with a frequency where f 1 f 2 -f-i I f, affects the occupied frequency band much less than the existence of additional components in the analyzed signal caused by the existence of phase discontinuities.

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Claims (1)

A PHASE-DIFFERENT MANIPULATOR containing a first frequency divider, the output of which is connected to the input of the first pulse shaper, * the output of which is connected to the first inputs of the first and second elements AND, and a decoder, the second input of which is connected to the output of the second element And, to the second input of which the first output of the first trigger, the input of which is connected to the output of the first element And, as well as the master oscillator, the first key and the first inverter connected in series, the input of which is connected to the first input of the first key, and T swarm key, a second input and whose output is connected respectively to the first output of the decoder and the output of the first switch, a second input coupled to the second output of the decoder of the tlichayuschiysya; that, in order to reduce the bandwidth occupied by the signal in the transmission line., the second and third frequency dividers, the third and fourth switches, the second inverter, the third and fourth elements And, the second trigger and the fourth frequency divider and the second pulse shaper connected in series, are introduced, the output of which is connected to the third input of the decoder, the second input of which is connected to the first input of the second trigger, the second input and output of which are “connected respectively to the output of the third AND element and to the first input of the fourth ele ment And, the second input of which is connected to the first input of the third element And, the second input of which is connected to the second output of the first trigger, and with the first input to the decoder, to the fourth input of which the output of the fourth element And is connected, and the output of the master oscillator ° is connected to the inputs of the second and third frequency dividers, the outputs of which are connected respectively to the first input of the first key and to the first input of the third key, to the second input of which the third output of the decoder is connected, the fourth output of which is connected to the first the input of the fourth key, to the second · 'input of which the output of the second inverter is connected, the input of which is connected to the first input of the third key, the output of which is connected to the output of the fourth key and the output of the first key, the first input of which is connected to the inputs of the first and fourth frequency dividers. zossior ”ns