SU1601766A1 - Combined radio line with noise-like signals - Google Patents

Abstract

The invention relates to radio engineering and can be used to measure motion parameters of objects and transmit information. The aim of the invention is to reduce the time of entry into communication. On the transmitting side, the generator 3 forms a pseudo-random sequence (PSP) modulated in duration. In the assignment block 7, the information message duration is linked to the marker duration. Switch 4, depending on the alternation of synchronized "1" and "0" information characters arriving at its control input, connects generator 3 to phase modulator 6 via adder 5, in which the memory bandwidth and the frequency meander are summed up. At the receiving side, the video sequence from the output of the synchronous demodulator 9 and the local video sequence from the output of the adder 11 are compared in the phase detector 10. This employs a phase locked loop consisting of a phase detector 10, a low-pass filter (LPF) 20 and a 15-clock generator. If the initial mismatch between the input and reference signals is large, the voltage at the output of the low-pass filter 20 exceeds the threshold of the threshold unit 23, which will cause the output of the pulse pattern generator 24 (and disconnecting the marker signal generator 13) to the sawtooth 14. The signal from the low-pass filter 20 through the selector 17 of the modulating signal of the clock oscillation, the driver 24 and the key 18 is fed to the inputs of the installation of the reference generator 12 PRS, setting the latter to the state corresponding to the state of the generator 3 PRBS on the transmitting side at the moment of forming the marker signal. 1 hp ff, 2 ill.

Description

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From the alternations of the synchronized 1 and O information symbols received at its control input, the generator 3 is connected to the phase modulator 6 via the adder 5, in which the memory bandwidth and the square frequency meander occur. At the receiving side, the video sequence from the output of the synchronous demodulator 9 and the local video sequence from the output of the adder 11 are compared in the phase detector 10. This employs a phase locked loop consisting of a phase detector 10, a low-pass filter (LPF) 20 and a 15-clock generator. If the initial mismatch between the input and

The invention relates to radio engineering and can be used to measure motion parameters of objects and transmit information.

The aim of the invention is to reduce the time of entry into communication.

Fig. 1 shows a structured electrical circuit of a combined radio link with noise-like signals; Fig. 2 is a structural electrical circuit of a clock modulating signal modulator.

The combined radio line with noise-like signals on the transmitting side contains a sawtooth voltage generator 1, a clock generator 2, a pseudo-random sequence generator 3, a switch 4, an adder 5, a phase modulator 6, an information signal attachment 7, a marker signal generator 8, on the receiving side - a synchronous demodulator 9, a phase detector 10, an adder 11, a reference generator 12 of a pseudo-random sequence, a generator 13 of a marker signal, a generator

14 saw voltage generator

15-stroke pulses, threshold unit 16, clock modulating modulator 17, switch 18, switch 18, low-pass filter 20, mixer 21, averaging unit 22, additional threshold block 23, and a pulse train 24.

The clock modulating signal selector 17 includes a phase detector 25, a low-pass filter 26 and a tunable oscillator 27.

Radiolini works as follows.

the reference signals are large, then the voltage at the output of the low-pass filter 20 will exceed the threshold of the threshold block 23, which will cause the pulse sequence 24 to exit the output of the pulse generator 24 (and turn off the marker signal generator 14) to the sawtooth generator 14 via the modulating signal 17 of the clock signal the oscillator, the driver 24 and the key 18 is fed to the inputs of the installation of the reference generator 12 of the SRP, setting the latter into a state corresponding to the state of the SRP generator 3 on the transmitting side at the time of formation with drove marker 1 ZP f-ly, 2 ill.

On the transmitting side, the generator 3 forms a pseudo-random sequence (figure 1), modulated in duration, the duration of the elementary

the symbols of which are determined by the frequency of the clock of the generator 2, the frequency of which varies according to a linear law defined by generator 1. In block 7, the bindings to which

signals (pulses) of the marker and discrete information; the duration of the information package is related to the duration of the marker, i.e. at the output of block 7, information packages are formed with a duration that is a multiple of the integer number of marker element packages.

Switch 4, depending on the alternation of incoming to its manager

the output of synchronized single and zero symbols of information connects the pth or (p-1) -and outputs of generator 3: phase modulator 6 through adder 5, in which pseudo-random sequence (PSP) and clock frequency meander are summed over each pseudo-random period linear sequence of the generator 1. As a result, the output of the adder 5 is the sum of the linear frequency modulated according to the linear law of the clock frequency and the sequence M (PSP) output from the (p-1) -th teas yes generator 3 or inverted sequence with Mr

The nth generator bit 3, modulated by the duration of the same linear function, which alternate in accordance with the transmitted information.

In the phase modulator 6, phase manipulation of the high-frequency carrier by the resultant signal from the output of the adder 5 is performed.

At the receiving side, as a result of input signal demodulation by the synchronous demodulator 9, a video sequence modulated in duration is obtained, which is then fed to the first input of the mixer 21, to the second input of which the sequence from the output of adder 11 is received, in which the pseudo-random sequence from the output the reference generator 12 and the meander of the clock frequency from the output of the generator 15, modulated according to a linear law, identical to the linear law on the transmitting side. The video sequence from the output of the synchronous demodulator 9 and the local video sequence from the output of the adder 11 are also fed to the inputs of the phase detector 10. where the phase comparison of two linear functions takes place. The received linear function is unmodulated by the transmitted information and its phase has a linear dependence on the proof between the incoming signal and the reference signal. By the phase mismatch of these two functions, the phase self-tuning ring consisting of the phase detector 10, the low-pass filter 20 and the generator operates 15, maintaining a constant mismatch between the input and reference signals.

In the case when the mismatch between the received and reference sequences is small, the voltage at the output of the low-pass filter 20 does not exceed the threshold value of the additional threshold unit 23 and the switch 19 is in a position that allows the marker pulse to pass to start the generator 14, the key 18 disabled. If the initial mismatch between the receiver and the reference sequence is large, the voltage at the output of the low-pass filter 20 will exceed the threshold value of the additional threshold unit 23 and it will open the key 18 and set the switch 19 to the position of the generator 24 , and the output of the imager 13 is disabled.

The accepted memory bandwidth, the spectrum of which contains a linear component modulated on the transmitting side according to a linear law, is sent to an extractor 17 (Fig. 2), from which low-pass filter 20 is removed, the voltage varying linearly corresponding to the linear modulation clock frequency on the transmitting side. This voltage is applied to shaper 24, which is triggered by a sawtooth voltage difference.

The impulse from the output of the generator 24 is supplied through the public key 18 to the installation inputs of the generator 12 and sets the latter to a state corresponding to the state of the generator 3 on the transmitting side at the moment of formation of the marker signal (for example, the state is all units in which the driver 8 is And), as well as a pulse through the switch 19, starts the generator 14. In this case, the mismatch between the - received and the reference sequence is reduced and the additional threshold unit 23 returns the key 18 and the switch 19 to start last condition. Further, the combined radio with noise-like signals works in the manner described above. The discrete information is embedded in the constant component of the output signal of the mixer 21 and is extracted by the averaging unit 22, and then supplied to the threshold unit 16.

Claims (2)

1. Combined radio with noise-like signals, containing on the transmitting side serially connected marker shaper, sawtooth generator, clock generator, pseudo-random sequence generator and switch, as well as a phase modulator and information signaling block, marker signal input and the output of which is connected respectively to the output of the marker signal generator and the control input of the switch, and the input of the marker signal generator is connected to the corresponding the pseudorandom sequence generator output, the information input of the information signal assignment block, the reference input and the output of the phase modulator, respectively, are the information input, the first reference input and the combined output of the combined radio link, on the receiving side - sequentially connected synchronous demodulator, phase a detector and a low-pass filter connected in series to a saw-tooth voltage generator, clock pulse generator, pseudo-random reference generator been consistent and the marker signal generator connected in series mixer. the averaging unit, the first and second inputs of the mixer are connected respectively to the OUTPUT of the synchronous demodulator and the second input of the phase detector, with the information input and the reference input of the irradiation demodulator and the output of the threshold unit being the linear input, the second reference input and the information output combined | 7 lines, characterized in that, i; in order to reduce the time of entry into 1: in s, sum - | In this case, the first and second inputs and the output of which are connected respectively to the outputs of the switch, the generator of pulses and the information input of the phase modulator, on the receiving side are connected in series an additional threshold unit and an ignition switch, connected in series to the modulating signal selector | oscillation, pulse trainer and key, as well as an adder, with the first and second 1 inputs and the output of the adder being connected respectively to the outputs of the reference generator torus {pseudo-random sequence, clock oscillator and second 25 the input of the phase detector, the output of the low-pass filter is connected to the second input of the clock pulse generator and the input of an additional threshold unit, the output of which is connected to the control input of the key, the output of which is connected to the setup input of the reference generator of the pseudo-random sequence, the generator of the signal generator of the marker, the pulse sequence generator , the switch and the synchronous detector are connected respectively to the first and second information inputs of the switch and the gene inputs Ator sawtooth modulating signal extractor and a clock waveform. 2. Radiolini according to Claim 1, from which it is so that the selector of the modulating signal of the clock oscillation contains series-connected phase detector, low-pass filter and adjustable oscillator, the output of which is connected to the reference input of the phase detector, and the information input the phase detector and the output of the low-pass filter are respectively the input and the output of the modulating signal of the clock signal, 26