SU652725A1 - Frequncy manipulator - Google Patents

Description

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The invention relates to communications and can be used in systems intended for discrete transmission. information for the formation of a European scale (FM) signal; | s with orthogonal symbols.

A frequency manipulator, an inverter, an inverter, two master oscillators, whose outlets are connected to the first inputs of the first and second phase manipulators, are also known, and are also connected to the frequency mixer inputs, the output of which is connected to the pulse synchronizer through the frequency doubler.

However, the well-known manipulator has a wide frequency band.

The aim of the invention is to reduce the occupied frequency range.

For this, a frequency manipulator containing an inverter, two master oscillators, the outputs of which are connected to the first inputs of the first and second phase manipulators, as well as connected to the inputs of the frequency mixer,

which, via a frequency doubler, is connected to the input of the impuser nmputts, the third and fourth phase handlers, the control unit and the adder are introduced, the output of the first master oscillator is connected to the first input of the third phase handler, and the output of the second master oscillator is connected to the first input through the inverter the fourth phase handler, the outputs of the frequency mixer and the pulse synchronizer are connected respectively to the first and second inputs of the control unit, the first output of which is connected to the second and the inputs of the second and third phase loudspeakers,: and the second output is the second inputs of the first and fourth phase manipulators, the outputs of all phase manipulators are connected to the corresponding inputs of the adder, and the control unit contains a differentiating stump, phase shifter, two inverters and two elements And , and the output of the phase shifter is connected to

the first input of the first element And directly and through the first inverter with the first input of the second element And, the first output of the differential circuit and the output of the second inverter are connected to the second inputs of the elements And, the second output of the differentiating circuit is connected to the input of the second inverter, while the inputs of the phase shifter and differentiating the circuits are, respectively, the first and second inputs of the control unit; the first and second outputs of which are, respectively, the outputs of the first and second elements I.

FIG. 1 shows a structural electrical manipulator circuit; FIG. 2 shows timing diagrams explaining his work.

The frequency manipulator contains two oscillators 1 and 2, the outputs of which are connected to the first inputs of the first 3 and second 4 phase handlers, as well as connected to the inputs of a frequency mixer 5, where 1 the frequency doubler 6 is connected to the synchronizer input .7 pulses, the third 8 and the fourth 9 phase handlers, the control unit 10, the adder 11 and the inverter 12, the output of the oscillator gene 1 being connected to the phase manipulator 8, and the output of the master oscillator 2 through 12 connected to the first input of the phase manipulator 9, outputs laugh The frequency knob 5 and synchronizer 7 are connected respectively to the first and to the control unit 10, the first output of which is connected to the second inputs of the second 4 and third 8 phase switches, and the second output to the second inputs of the first 3 and fourth 9 phase switches The outputs of phase manipulators 3, 4, 8, and 9 are connected to the corresponding inputs of the adder 11.

Control unit 10 comprises a differentiating circuit 13, a phase shifter 14, inverters 15 and 16, and two elements, And 17 and 18.

The manipulator works as follows.

The oscillations of the initial frequencies f and f (see Fig. 2 a, b) from the outputs of the master oscillators 1 and 2 are fed to the frequency mixer 5 and through the phase handles 8 to the adder 11.

From the output of the frequency mixer 5, the oscillation of the difference frequency and fi-fo (see Fig. 2c) is fed to the control input of the unit 10 n to the input of the frequency input b in, from the output of which the oscillation of the double difference frequency Pf (see Fig. 2d) is fed manager

synchronizer input 7 pulses.

The input binary signal (see Fig.2d) is fed to the input of the synchronizer 7 pulses, the output of which forms a binary signal with a duration of

Ox TC 5B -Ajt (see Fig. 2e), determined by the time between the moments when the oscillation of the difference frequency passes through O, and then fed to the input of the control unit 1 km.

5 Uprpvl not block 10 at the time of transition from one to another symbol of a binary signal generates signals for switching phase manipulators, which arrive at the outputs

control unit 1O, and at its first output (see Fig. 2h), these signals arrive at the moments when phase i of the oscillation of the difference frequency is zero, and the second output when the phase

5 is 180 (see Fig. 2i) ...

From the outputs of block 10, these signals arrive at the phase manipulators 3, 4, 8, and 9 and provide a change in the phase of the source frequencies f applied to their inputs, and 180.

The outputs of the phase manipulators 4 and 9 receive the oscillation of the initial frequency f (see Fig. 2i), and the phase manipulators 3 and 8-). and with a phase shift of 180 provided by the inverter 12.

At the outputs of phase manipulators 3, 4, 8 and 9, phase mapped signals with a symbol duration T — 2Tc are obtained, and the signals (see FIG. 2k, l) from the outputs of phase manipulators, pulters 4 and 8 are shifted by Tc relative to signals (see Fig. 2m, n) from the entrance of the phase manipulators 3 and 9.

All these signals are received on day 24, the output of which receives an FM signal with a duration of characters

Tc

And without phase breaks

c (see FIG. 2o), which corresponds to the goal of forming an FM signal with orthogonal symbols and the minimum possible width of the occupied frequency band. ..

Claims (2)

In this case, the frequency manipulator does not contain digital elements that must operate at a speed exceeding the information speed of the binary signal. 5 As a control unit 10, a device containing a differentiating circuit 13 is used, the output by positive pulses is connected to the first inputs of two elements AND 1 and 18 directly, and the output by negative pulses through an inverter 1 between the second inputs of elements AND 17 and 18 include an inverter 16 whose input is connected to the output of the phase shifter 9O, and the input of the unit 10 is the input of the differentiating circuit 13, its control input of the phase shifter 14, and the outputs of the outputs of the AND elements 17 and 18. To the input of the differentiating circuit 13 binary signal is coming. At the moments of transition from one symbol to another, at the outputs of differentiating circuit 13, pulses of different polarities appear - positive when going from O to and negative when passing from -1 to O. Positive pulses are fed to the first inputs of the And 17 and 18 elements directly negative - through the inverter 15. As a result, the elements And 17 and 18 receive a sequence of positive pulses at the moments of changing the state of the binary signal and the next after intervals, multiples of Tc. The input of the phase shifter 14 is 90 Difference frequency difference (see Fig. 2c). From its output, the oscillation (see Fig. 2g), shifted in phase by 90 relative to the oscillation of the difference frequency, goes to the second input of the AND 4 element, and to the input of the 18 element, through the inverter 16. And the outputs of the 17 and 18 elements , a sequence of pulses (see Fig. 2i), following at intervals of time, 1 phat 2Ts, with pulses passing to the output of the element And 17, the oscillator (see fig, 2g) has a phase equal to 9b, and And 18 to the output of the element when the phase of this oscillation is 270, which ensures the shift of the sequences (see Fig. 2i) of the pulses by TC one relative to another. Thus, the proposed frequency manipulator will allow forming the FM ignals with orthogonal symbols and the minimum possible frequency band of the 25 occupied frequency band with the information speed of its elements not exceeding the information speed. Claim 1. Frequency manipulator containing an inverter, two master oscillators. the outputs of which are connected to the first inputs of the first and second phase meters, and also connected to the inputs of a frequency mixer, the output of which is connected via a frequency doubler to the input of a pulse synchronizer, characterized in that, in order to reduce the occupied frequency range, the Third and Fourth phase switches, a control unit and an adder, the output of the first master oscillator is connected to the first input of the third phase manipulator, and the output of the second master oscillator is connected via an inverter to the first input The Fourth phase manipulator, the mixer outputs the frequency synchronizer and pulse are connected to. the first and second inputs of the control unit, the first output of which is connected to the second inputs of the second and third phase switches, and the second output - to the second inputs of the first and fourth phase switches, and all the outputs of the phase switches are connected to the corresponding inputs of the adder . 2. The manipulator according to claim 1, that is, that the control unit contains a differential circuit, a phase shifter, two inverters and two I elements, the output of the phase shifter connected to the first input of the first electric amp & directly and through the first inverter - with the first input of the second element I, the first output of the differentiating circuit and the output of the second inverter are connected to the second inputs of the elements I, the second output of the differentiating circuit -. connected to the input of the second inverter, while the inputs of the phase shifter and the differentiating circuit are respectively the first and second inputs of the control unit, the first and second outputs of which are respectively the outputs of the first to the second elements I.