RU38256U1 - RADIO TRANSMISSION DEVICE - Google Patents

Abstract

A radio transmitting device comprising a power amplifier, a parameter control unit connected to an information input of a control pulse generator, the output of which is connected to a control input of a switch of RF oscillations, to the switching inputs of which is connected a block of RF generators, a pulse output of a switch of RF oscillations through a serial connection of an OR element and a shaper modulating pulses connected to the modulation input of the amplitude modulator, and the high-frequency output through the multiplier is connected to another input of the amplitude modulator, characterized in that a reflected signal sensor is input into it, the input of which is connected to the output of the power amplifier, and the signal output is connected to the input of the output frequency control unit, the reference output of which is connected to the control input of the parameter control unit, while the output of the unit parameter control is connected to the input of the first AND element, the second input of which is connected to the main output of the output frequency control unit, while the output of the first AND element is connected to the second input of the element OR, the output of the parameter control unit through the second AND element is connected to the modulation input of the phase modulator, the second input of the second AND element is directly connected to the output of the forced output of the output frequency control unit and to the second input of the control pulse shaper, the RF input of the phase modulator is connected to the output of the amplitude modulator, and the output is connected directly to the input of the power amplifier, while the output of the device is the output of the RF sensor of the reflected signals.

Description

Radio transmitting device

A radio transmission device belongs to the field of radio engineering and can be used in radio telemetry systems to obtain information from ground, air and space objects.

Known transmitter with pulse-code modulation (PCM) of signals 1, containing in each channel a circuit for calculating the difference between the previous input signal and the current input signal, zero elimination circuits, a signal switching circuit, a signal summing circuit that modulates the signals of several channels and transmits PCM sequentially signals, switching them with separation in time, synthesizes a sequence of PCM signals with time compression. The disadvantage of such a system is that it transmits information at a constant speed without taking into account the radiation conditions of the radio signals, constantly consuming the energy of the power source, and also in the presence of the shielding effect of the transmitting antenna, loading the reception and recording equipment with poor-quality chaotic information.

Limited capacity of the power source and, as a rule, limited capacity of the recording device of the receiving points

makes demands on the speed of information transfer from the control object, since the volume of the transmitted information and its reliability during registration (reliability) also depend on this. For example, when passing

the spacecraft of the plasma path sections, when there are times of both reliable radio communications and instants of unstable radio communication due to the screening effect of the plasma on the transmitting antenna or when the transmitting antenna is obscured by a protective screen hood or other object in various systems.

A radio transmitting device 2 is known, which contains a master oscillator connected through a buffer cascade to the input of the first modulated cascade, a pulse shaper connected to a pulse modulator, the output of which is directly connected to the modulation inputs of the modulated cascades, and through a delay, a pulse shaper and a second pulse modulator with modulating the input of the last (more powerful) modulated cascade, the output of which is the output of the device.

The transmission speed of this radio transmitting device is fixed and, therefore, does not depend on the conditions in which the transmitting antenna works, which is a disadvantage of the device.

The closest in technical essence is a radio transmitting device described in 3, containing a control unit, a control pulse shaper, an OR element, a shaper

modulating pulses, a block of RF generators and a series-connected switch of RF oscillations, a multiplier, an amplitude

a modulator and a power multiplier, while the output of the latter is the output of the device.

The disadvantage of this device is the low reliability of information in intermittent conditions due to the screen version of the transmitting antenna, radio.

The technical result of the utility model is to increase the reliability of obtaining information under conditions where there are times of reliable radio communication and moments of unstable radio communication due to the shielding effect on the transmitting antenna, for example, plasma.

The technical result of the utility model is achieved in that in a radio transmitting device containing an amplifier, a parameter control unit connected to the information input of the control pulse generator, the output of which is connected to the control input of the RF oscillator switch, to the switching inputs of which the RF generator unit is connected, the pulse output of the RF switch oscillations through the OR element, the modulating pulse generator is connected to the modulation input of the amplitude modulator, and the high-frequency output is cleverly rer connected to the other input of the amplitude modulator, connected to sensor input signals reflected

to the output of the power amplifier, and the signal output is connected to the input of the output frequency control unit, the reference output of which is connected to

the control input of the parameter control unit, while the output of the parameter control unit is connected to the input of the first AND element, the second input of which is connected to the main output of the output frequency control unit, while the output of the first AND element is connected to the second input of the OR element, the output of the parameter control unit is through the second the And element is connected to the modulation input of the phase modulator, the second input of the second And element is directly connected to the output of the forced output of the output frequency control unit and the second input is formed To control pulses RF input phase modulator coupled to the output of the amplitude modulator, and the output is coupled directly to the input of the power amplifier, wherein the output device is the output of the RF transmitter reflected signals.

Figure 1 shows a block diagram of a radio transmitting device; 2, 3, 4, 5 - diagrams explaining the operation of the device.

The device in figure 1 contains a parameter control unit 1 connected to the information input of the control pulse generator 2, the output of which is connected to the control input of the RF oscillation switch 3, to the switching inputs of which the RF generator unit 4 is connected, and the pulse output of the RF switch

oscillations through the element OR5 and the modulating pulse shaper 6 is connected to the modulation input of the amplitude modulator

7, the high-frequency output of the switch of the RF oscillations 3 through the multiplier 8 is connected to another input of the amplitude modulator 7, the input of the reflected signal sensor 9 is connected to the output of the power amplifier 10, the signal output of the reflected signal sensor 9 is connected to the input of the output frequency control unit 11, the reference output of which is connected with the control input of the parameter control unit 1, while the output of the parameter control unit is connected to the input of the first I12 element, the second input of which is connected to the main output of the frequency control unit water11, while the output of the first element

And12 is connected to the second input of the OR5 element; the output of the parameter monitoring unit 1 through the second element I13 is connected to the modulation input of the phase modulator 14, and the second input of the second element I13 is directly connected to the output of the forced output of the control unit of the output frequency 11 and the second input of the control pulse shaper 2, the phase modulator 14, the input of which is connected to the output of the amplitude modulator 7, and the output is connected directly to the input of the power amplifier 10, while the output of the RF sensor of the reflected signals 9 is the output of the device.

The device operates as follows. Parameter Control Unit

1 performs a survey of sensors located at the monitoring object, for example, on a descent spacecraft according to a given pro-gram and

generates informational packages (Fig. 2) in the form of pulses of duration TU with a repetition period Tp determined by the output frequency control unit 11 (Fig. 3a). The structure of the information packages arriving at the input of the I12 element, the input of the I13 element and the information input of the control pulse generator 2, consisting of the reference pulse oi, information pulses Uj, ... UN is shown in (Fig. 36). Time intervals (Tui ... TUN) between the reference (s) and information pulses (uj ... UN) carry an information load.

From the output of the control unit, the reference signal and information pulses (ui ... UN) (Fig. 36), if there is permission at the second input of the I12 element from the main output of the frequency control unit, output 11 (Fig. 3g) through the I.I5 element is input modulating pulse shaper 6 and control pulse shaper 2, which generates pulses kl, k2 to create code intervals or (Fig. Sv) carrying information about the membership of the sending of video pulses to a specific object of control, while the code pulses kl and k2, formed by duration, pic upayut through ILI5 element also on input of the modulating pulses 6 (FIG. rear). Shaper 11 control pulses 2 carries

connecting the required high-frequency generator of the block of RF generators 4 through the multiplier 8 to the input of the amplitude modulator 7

(Fig. 3e), in which amplitude modulation is performed and from its output a high-frequency pulse signal in the absence of a signal from the output of element I13 (Fig. 3c) through a phase modulator 14 (Fig. 3c), a power amplifier 10 and a reflected signal sensor 9 are output devices (Fig. 3l).

If the transmitting antenna operates in the normal radiation mode and there is no screening effect, then there is no signal from the signal output of the reflected signal sensor 9 (Fig. Zi) and the output frequency control unit 11 forms a ban on the second input of the control pulse generator 2 and on the second input of the I13 element, supporting the ban on the modulation input of the phase modulator 14 (Fig. Zd), thereby providing the initially specified (most economical in terms of energy consumption) interrogation of sensors and radiation of telemetric packages.

When a monitoring object moves in the Earth’s atmosphere (an example of a spacecraft descent vehicle), when time instants with unstable radio communication occur due to the screening effect of the plasma on the transmitting antenna, the emitted high-frequency signal is reflected from the medium, is extracted in the reflected signal sensor, and detected on the signal output of the reflected sensor 9 signals at time points

AB, CD (Fig. 4a), a video signal is generated, which is fed to the input of the output frequency control unit 11, while the frequency control unit

output 11 changes (decreases) by this time the pulse repetition rate at the reference output, thereby changing (decreasing) from "to Fn the repetition rate of information messages from the parameter control unit 1 (Fig. 46).

During the interval of normal operation time of the transmitting antenna (BC — radio transparency window (Fig. 4a)), when the high-frequency signal is emitted by the antenna and there is practically no reflection, the prohibition signal from the reflected signal sensor 9 stops and does not enter the input of the output frequency control unit 11 ( Fig. 4), and the latter according to a predetermined program includes either a mode of increased repetition rate of information packets (time interval B C Fig. 46) by increasing the frequency of the reference pulses from the reference output to the input of the block role of parameters 1 (), or implementing a forced mode with the transmission of information with a frequency

Rptah 1 / Tptsh (phiG. 5a).

To this end, the control unit for controlling the frequency of control of output 11: generates a prohibiting signal at the main output (Fig. 5d, time interval BC), which is fed to the second input of element I12 and prevents the passage of information signals from control unit 1 through element OR5 to the modulator

pulses 6;

at the output of the forced output, it generates an enable signal to the second input of element I13 (Fig. 5g, time interval BC) for information signals from the parameter control unit 1 to the phase modulator 14, while the enable signal is fed to the second input of the control pulse generator 2, which switches the switch of the RF oscillations 3 to the mode when one of the generators (for example, the main one) of the block of the RF generators 4 is connected to its high-frequency output, the RF oscillations of which are transmitted through the multiplier 8 to the amplitude modulator 7 (Fig. 5e, time interval BC), and from the pulse output of the RF switch 3, the pulse signal (Fig. 5c) through the OR5 element is fed to the modulating pulse generator 6, while during the action of this pulse the RF oscillations from the output of the amplitude modulator 7 arrive on the RF input of the phase modulator.

Simultaneously with the generation of the inhibitory signal for pulse modulation by the signals of the control unit and the enable signal for phase modulation, the control unit for output frequency control 11 generates signals at the reference output with a predetermined maximum frequency (Fig. 5a) RP max l / T „min arriving at the unit

control parameters 1, which displays information in the form of information pulses with a maximum (predetermined) frequency (Fig. 56,

o9 / Ool / c S -9 time interval BC) to the modulation input of the phase modulator 14. At the same time, intra-pulse phase modulation of the RF oscillations is carried out, which allows you to sharply increase the speed of transmission and receipt of telemetric information from monitoring objects in the radio window.

An introduction to the proposed device of a reflected signal sensor, an output frequency control unit, a phase modulator, and two And elements with appropriate connections makes it possible to increase the transmission speed of telemetric information at the time of normal operation of the transmitting antenna.

This achieves the technical result — an increase in the reliability of obtaining information when there are times of reliable radio communications and times with unstable radio communications due to the shielding effect on the transmitting antenna, for example, plasma.

09 / L

-10 References:

1 Japanese Patent No. 4-44855, HO4B14 / 06.

2 Radio transmitting devices. Textbook for high schools. / L.A. Belov, M.V. Blagoveshchensky - M .: Radio and communications, 1982, p. 311-312, Fig. 21.16 /.

3 Patent of Russia No. 2113056, HO4 B7 / 00 BI No. 16, 1998 (prototype).

o (-11

Authors: / Deputy Director for Research - Chief Designer V.F. Borisov V.E. Kostyukov A.V. Chernov .. V.Katin

Claims (1)

A radio transmitting device comprising a power amplifier, a parameter control unit connected to an information input of a control pulse generator, the output of which is connected to a control input of a switch of RF oscillations, to the switching inputs of which is connected a block of RF generators, a pulse output of a switch of RF oscillations through a serial connection of an OR element and a shaper modulating pulses connected to the modulation input of the amplitude modulator, and the high-frequency output through the multiplier is connected to another input of the amplitude modulator, characterized in that a reflected signal sensor is input into it, the input of which is connected to the output of the power amplifier, and the signal output is connected to the input of the output frequency control unit, the reference output of which is connected to the control input of the parameter control unit, while the output of the unit parameter control is connected to the input of the first AND element, the second input of which is connected to the main output of the output frequency control unit, while the output of the first AND element is connected to the second input of the element OR, the output of the parameter control unit through the second AND element is connected to the modulation input of the phase modulator, the second input of the second AND element is directly connected to the output of the forced output of the output frequency control unit and to the second input of the control pulse shaper, the RF input of the phase modulator is connected to the output of the amplitude modulator, and the output is connected directly to the input of the power amplifier, while the output of the device is the output of the RF sensor of the reflected signals.