SU725248A2 - Radio line with noise-like signals transmitting measurement information - Google Patents

Description

The invention relates to radio engineering and can be used in communication systems in which measurement information is transmitted, representing the results of measuring any physical parameters, in particular, in navigation systems, in which information about times and location of objects is transmitted. , According to the main author. Syid No. 509194 is known radiolini with pgum-like; signals for transmitting measurement information, containing on the transmitting side a carrier frequency generator connected to a phase handler whose second input is connected to a pseudo-random sequence modulator (psi) connected to the memory bandwidth generator, and on the receiving side a synchronization channel and info1 " a channel consisting of a series-connected multiplier, a band-pass filter, a phase detector, an integrator, and a decision circuit, with the second inputs of the multiplier and the phase detector connected from output 1 channel-synchronization, as well as containing shift registers on the transmitting side and OUTPUT, the bits of which are interconnected, an information signal was sent to the first bit of the input register of the c. chvig and the last bit of the output shift register was connected to the information one the input of the modulator PSP, additional outputs of the generator PSP connected to the decoder, the output of which is connected to the shift register of the input register directly, and through the delay line - with the inputs of two gates, and through the splitter oy - with the input register reset bus and with a single trigger input, the corresponding outputs of which are connected to the control inputs of the valves, and the output of the first valve is connected to the shift register of the output register through the functional frequency divider, and the output of the second veytil is connected through the counter with zero. WHO.COM of the trigger and through the marker code generation scheme — with the second input sum A, the output of which is connected to the PS, P modulator, and the input shift register on the receiving side (and the output shift register, the bits of which are interconnected, at cmr first two-way register

where the output is connected to the output of the decisive x & ly, and the output of the decoder connected to the output of the SRP generator is connected to the output shift register bus and to the inputs of two gates that control; the inputs of which are connected to the corresponding trigger outputs, the output of the first valve The output of the raiding circuit is connected via the decoder of the marker parcel with a single trigger input and with the Reset bus of the input register 1 .;

However, the radio line is known, it has insufficient reliability of the transmission of measurement information.

The purpose of the invention is to improve the transfer of measurement information.

To achieve this goal, in the radio line with noise-like signals for transmitting measurement information, a block for changing the width of the filter passband is entered, the output of which is connected to the control input through a frontal filter, and the output of the corresponding functional frequency divider is connected to the input b, which changes the bandwidth of the filter.

The drawing shows a structural electrical circuit of the proposed radio link with noise-like signals. The radio line on the transmitting side contains a carrier frequency generator 1, a phase manipulator 2, a SRP modulator 3, a SRP generator 4, a decoder 5, a frequency divider 6, an input 7, and an output. 8 shift registers, delay line 9, softs 10 and 11, counter 12, adder 13, functional frequency divider 14, marker code generation circuit 15 and trigger 16, and on the receiving side - multiplier 17, band pass filter 18, phase detector 19, integrator 20, generator 21. PSP, decoder 22, decisive 23, gates 24 and 25, input 26 and output 27 shift registers, synchronization channel 28, trigger 29, counter 0, (functional frequency divider 31, czrder 32 marker parcel, and 33 change the width of the filter passband,.

Radiolini works as follows

In the initial state, the valve 10 is closed, and the valve 11 is open and cyclic pulses of the memory bandwidth pass from the output of the decoder 5, pass through the circuit 15 to form the code and to the counter 12 clock pulses of the marker, As soon as the counter T2 eaUHufefclT

the number equal to the number of pulses in the marker parcel, from the output of the counter 12, arrives at the trigger 16 a pulse that sets it and the state in which the valve 11 is closed and the veins, til 10 is open and through it the cyclic pulses go to the frequency divider 14 that generates clock pulses with a varying period: the following house in accordance with the optimal distribution of energy between

 sp dam. An information packet arriving at the input of the shift register 7 is recorded in it, then the pulse of the output of the frequency divider 6 is copied to the output register of the shift switch 8, the output of which

under the action of shear pulses form. It operates an information package with an optimal energy distribution between the bits. Following the marker parcel, this parcel through the adder 13 arrives at the SRP modulator 3, which is modulated in some way (inverse, delayed, orthogonal SRP and m, e, d.). V.Yuhda frequency divider 6 sets the trigger 16 to its original state.

At the receiving side, in the initial state, the integration integrator time 20 is set equal to the duration of the marker burst, and the bandwidth of the band-pass filter 18 is equal to the width of the spectrum of the marker burst. At the output of the decision circuit 23

5, the symbols of the marker and information parcels in the form of short pulses are formed. These pulses arrive at the decoder 32 marker package. Trigger 29 is decoded and set.

0 to the state in which the valve 24 is open and the valve 25 is closed. In this case, cyclic pulses from the output of the decoder 22 arrive at a functional frequency delidel 31, from the output of which, pulses with a varying follow-up period, in accordance with the optimal energy distribution, are fed to the shear bus of the input shift register 26, in which information received is received. Under the action of pulses From the output of the decoder 32 of the marker parcel, the information recorded in the input shift register 26 is copied to the output register from track 27 and pushed out of it.

5 cyclic pulses. Pulses from the output of the functional splitter 31 are also fed to the integrator 20 to change the integration time, as well as to the input of the block 33 to change:

And not the bandwidth of the bandpass filter. At the output of the output shift register 27, the same parcel is received as it was fed to the input of the input shift register 7 on the transmit side of the radio link.

Thus, the bandwidth of the band-pass filter 18 is automatically set equal to the width of the transmission of the awesome bit. This reduces the passage of noise through the band-pass filter 18, which reduces the overload from the interference signals of the phase detector 19, and this leads to an increase in the reliability of receiving measurement information, especially older, most important bits.

Claims (1)

1. USSR author's certificate No. 509194, cl. H 04 B 9/00, 1974 (prototype).