RU76760U1 - RADIO SIGNAL RECEIVING DEVICE FOR SYNCHRONOUS TIME DIVISION OF CHANNELS - Google Patents

Abstract

The utility model relates to the field of devices for transmitting and processing information from several subscribers over a radio channel and can be used in multicast systems for transmitting and receiving information to improve its quality, sufficiently simple technical implementation. The technical result of the utility model is to expand the arsenal of digital information processing devices with synchronous time division of channels, simplifying their design, and the absence of structural interference at the receiver input. A device for receiving radio signals with synchronous time division of channels contains a logical signal multiplier 1, an integrator 2, a decision circuit 3, a reference signal generator 4, ROM 5, a digital timer 6. The utility model allows to simplify a device with synchronous time division of channels, to eliminate the presence of system noise at the input receiver.

Description

The utility model relates to the field of devices for transmitting and processing information from several subscribers over a radio channel and can be used in multicast systems for transmitting and receiving information to improve its quality, sufficiently simple technical implementation.

In various areas of information transmission over the radio channel (in radio communications, radio control, etc.) there is an increase in the number of subscribers to whom various messages are transmitted. In this case, various methods of selecting information intended for a particular subscriber are used (synchronous, asynchronous systems with frequency, time, code separation of signals, etc.). The disadvantages include the complexity of multichannel information processing systems, the presence of systemic interference at the input of a radio receiver from a large number of subscribers.

Known devices are synchronous address communication systems with strict group signal limitation, which contain an n-channel optimal demodulator, including a reference signal generator, multiplier, integrator, solver and synchronizer (L. Varakin, Communication systems with noise-like signals. M .: Radio and communications, 1985 - p.232).

This technical decision was made by us as a prototype. The number of channels in such an optimal demodulator increases with the number of subscribers n in the system. The larger the number of subscribers in the system, the more difficult the signal processing device will be.

Thus, the disadvantages of existing devices of synchronous address communication systems used for processing multicast information is the complexity of manufacturing, which increases with increasing

the number of subscribers, as well as the presence of structural interference at the input of the receiver.

The technical result of the utility model is to expand the arsenal of digital information processing devices with synchronous time division of channels, simplifying their design, and the absence of structural interference at the receiver input.

This technical result is achieved by the fact that in the device containing the reference signal generator, a multiplier, an integrator, a solver and a synchronizer, a digital timer is introduced instead of a synchronizer (Digital timer with periodic correction of the time setting. Utility model patent No. 72104 of June 4, 2007), the outputs of which connected to the inputs of the integrator and the solver, as well as to the input of the inserted read-only memory (ROM), the output of which is connected to the input of the reference signal generator. At the beginning of the work with a circular signal received by all subscribers, the initial installation of all highly stable economical timers of network subscribers is carried out to zero, with a sequential time shift at the addresses by the duration of the transmitted signal and the absolute instability of the countdown during the operation of the system. In addition, with the amplitude limitation of the input signal, the LP2 564 series integrated circuit is used as the multiplier, the integrator is made on the IE11 564 series counter, the deciding device is on the IP2 564 series integrated circuit, the ROM is on the RU2 of the 537 series.

In the utility model, only one channel is used for signal processing, and for sufficiently short coded messages, a sufficiently large number of subscribers can work in the system with a minimum delay in receiving and processing information. In this case, there is no system interference at the receiver input.

Figure 1 presents a diagram of a device for receiving radio signals with synchronous time division of channels. The device contains a logical

signal multiplier 1, to the first input of which an amplitude-limited input signal is supplied at zero level, the output of which is connected to the input of the integrator 2, the integrator output is connected to the input of the decision circuit 3, the second input of the logical signal multiplier is connected to the output of the reference signal generator 4, input which is connected to the ROM 5, the input of the ROM is connected to the output of the digital timer 6, the second inputs of the integrator and the solver are connected to the outputs of the digital timer.

A device for receiving radio signals with synchronous time division of channels works as follows. The input phase-manipulated signal, limited in amplitude, is fed to the logical signal multiplier 1, where it is compared with the reference signal coming from the reference signal generator 4. The signal code at a given time is set by the signal from digital timer 6, which determines the area for reading information from ROM 5. The result of the comparison is written to integrator 2. If the codes of the received signal and the reference code coincide, a positive number is written in the integrator, which is compared with the threshold in the solver ve 3. In the absence of systemic noise at the input of the receiver, the presence of a threshold is determined by the effect of a random noise process on the input.

Thus, the digital device we proposed allows us to simplify the design and make the manufacturing process more convenient, to obtain a device with synchronous time division of channels and the absence of system interference when using only one processing channel, regardless of the number of subscribers.

Claims (5)

1. A device for receiving radio signals with synchronous time division of channels, comprising a signal multiplier, a reference signal generator, an integrator and a solver, characterized in that instead of a synchronizer, a digital timer is installed in series, the output of which is connected to the input of a permanent storage device, the output of which is connected to the input of the generator reference signal, its output is connected to the second input of the signal multiplier, the first input of which is the input of the device, the output is connected to the first input ohm integrator, the second input of which is connected to the output of the digital timer, the output of the integrator is connected to the first input of the solver, the second input of which is connected to the output of the digital timer. 2. The device according to claim 1, characterized in that the integrated circuit LP2 564 series is used as the multiplier. 3. The device according to claim 1, characterized in that the integrated circuit IE11 564 series is used as an integrator. 4. The device according to claim 1, characterized in that an IP2 564 series integrated circuit is used as a deciding device. 5. The device according to claim 1, characterized in that the RU2 537 series integrated circuit is used as permanent storage device.