SU1518912A1 - Device for shaping phase-manipulated signals - Google Patents

Abstract

The invention relates to radio and can be used in the construction of transmitters of digital radio information transmission systems. The purpose of the invention is to increase the frequency of manipulation. To achieve the goal, the device containing r-rr 1 rf, phase-shifting unit 2, key 3 and band-pass filter 6 are entered into p mixers 4, rc-5 frequency grid, p-1 band-pass filters 6 and key 7. The generator 5 generates a set p simultaneously acting harmonic vibrations. The corresponding oscillations from the generator 5 are fed to the heterodyne input of each of the p mixers 4. At the output p of the mixers 4, a pair of oscillations is formed with carrier frequencies whose value is equal to the difference and sum of the frequencies W _O and W _RI . Each of these pairs of oscillations is fed to the input of the filter 6. Each of the filters 6 passes only the oscillation of the total frequency (W _O + W _RI ) to its input. From the output of the corresponding I-th filter 6, each of the vibrations is supplied to the acc. signal input of the key 7. At the output of the key 7, an FMF signal is generated. 1 il.

Description

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It is considered radio communication and can be used when building transmitters of digital radio systems.

Uerij.K) of the invention is to increase the frequency of manipulation.

The drawing shows a structural electrical circuit of the device for generating signals with a 1C1 phase-frequency manipulator.

The device comprises a high-frequency generator 1, a phase-shifting unit 2, the first key J, p of the mixers 4, the generator 5 of the frequency grid, p-1 band pass 6, the second key 7.

A device for generating signals with phase-frequency manipulation operates as follows.

High frequency generator 1 generates highly stable monochromatic oscillation of the form

S, (c) A cOsCcOo with Cto),

where A is the oscillation amplitude;

QO - round ov oscillation frequency;

(P is the initial phase of the oscillation.

P

(Output 1 of high-frequency generator 1, the oscillation S. (t) enters the phase shifting input of block 2, which has q curves. The shift of the initial phase of the oscillation at each output of the phase-shifting block 2 is different and equal to

corner multiple -. Swings from exits

q

Phase-shift block 2 have respectively the following initial phases:

H oh;

27

q

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each of the q-oscillations with the same carrier frequency, coO, of the same amplitude L and different phases (D., where i € Г goes to the corresponding signal input of the key 3. In accordance with the law F (c) of changing the first mating signal to the first money - puliruyup (iy input key 3, is produced by switching to its output of one of the q-oscillations with the corresponding

phase phases. At the output of key 3, a FM signal is generated, which is described by the following expression:

g. lS2U) A cos (CO „t-b, (t) + (f).

The generator 5 of the grid frequency generates a set of simultaneously acting harmonic oscillations of the form:

S ,, (t;) B cos C0r, t; b3j (t) B cos S, (t) B cos CO t;

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five

0

five

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five

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five

, (t) B cos COrpt, where B; tOri,

(, p) is the amplitude and circular frequency of the i-th oscillation.

From the output of key 3, the oscillation S (t) goes to the signal inputs of all p mixers 4. At the same time, the heterodyne input of each of p mixers 4 from the output of generator 5 of the frequency grid receives the corresponding oscillation where i P.R3- At the output of each of p mixers 4 a pair of oscillations is formed with carrier frequencies whose value is equal to the difference and

the sum of the frequency of COO g; Each of these pairs of oscillations is fed to the input of the corresponding band-pass filter 6 with a bandwidth Wm and a center frequency (o, + (0g;). Each of the filters 6 passes only its cyan frequency (OQ + Qr;) to its output with the total frequency (C0 (5 - Cyr.) from the output of the corresponding i-ro filter 6 goes to the corresponding signal input of the key 7. In accordance with the law K; (t) the change of the second manipulating signal to the manipulating input of the key 7 is switched on his way out one of the p input oscillations. At the output of the key 7 fop iperky cfm signal.

Claims (1)

Invention Formula A device for generating signals with fa-o-frequency manipulation, comprising a series-connected high-frequency generator, a phase-shifting unit and a first key, as well as a band-pass filter, characterized in that, in order to increase the frequency of manipulation, the input of 5 mixers, the outputs of the mixer – grid frequency generator, p mixers, are connected to the inputs of the corresponding (p – 1) bandpass filters and the second bandpass filters, the outputs of which are the output of which are output connected to corresponding to the home device, the code of the first key to the inputs of the second key, and the controlling ones connected to the first inputs of the mix inputs of the first and second keys, the outputs of the grid generator are first and second frequency connected to the second inputs of the corresponding handles the entrances of the device.