SU557503A1 - Device for monitoring discrete communication channels - Google Patents

Description

one

The invention relates to radio engineering and can be used to control the qualities of discrete communication channels with variable parameters without interruption of communication.

A device for controlling communication channels is known, which contains a gating cascade and shift registers; the output of the gating cascade is connected to the inputs of two identical channels that are configured to receive signals — E1-equivalents of O and 1 symbols each of which are connected in series with an analog adder with a settable threshold. , a shift register, a decision block that implements the selection logic, the output of the decision block of the first channel is connected to an adder, and the output of the decisive block of the second is connected to another input Nala l.

It is also known a device for monitoring discrete communication channels, containing a coherent correlation receiver with two integrators, the output of each of which is connected via the trigger circuit to the corresponding inputs, two coincidence circuits, and an additional 2J integrator.

However, in this device, when it is turned on, it takes a considerable time to enter the operating mode. This is due to the fact that the threshold is adjusted according to the signals of unreliable detection, the frequency of which depends on the quality of the channel, in order to achieve the steady state mode of the device, a certain signal accumulation statistics must be dialed. At the same time, the higher the quality of the controlled channel, the less often the signals from a reliable detection of traces and more often appear, the longer the transition time in the threshold control circuit after the device is turned on.

The purpose of the invention magnifier: e speed device.

Claims (2)

For this, a device for controlling discrete communication channels containing a coherent correlation receiver with two integrators, the output of each of which is through the trigger circuit to the corresponding inputs of two coincidence circuits, and the TaitKie are an additional integrator, is added to the device and a scaling unit, wherein the outputs of the coherent correlation receiver integrator are connected via successively connected adder, additional integrator and scaling unit to the control inputs of the release circuits. The drawing shows a structural electrical circuit of the proposed device. Devices for control of discrete communication channels, contains a coherent correlation Eo-shy receiver 1 with two integrators 2, the outputs of which are connected via trigger circuits 3,4 to the corresponding inputs of two coincidence circuits 5,6, as well as through a series-connected adder 7, The additional integrator 8 and scaling unit 9 are connected to the control inputs of the release circuits 3.4. The inputs of the integrators of tori 2 are connected to the inputs of the coherent correlation receiver 1 via multipliers 10, and the outputs of the trigger circuits 5,6 are connected via the OR 11 element with the input of the decision block 12, the device operates as follows. The reference and noisy signals corresponding to it are fed to the coherent correlation receiver 1. Random signals received at the outputs of the integrators 2 are fed to the information inputs of the trigger circuits 3 and 4, as well as to the inputs of the adder 7. If the magnitude of these signals is greater than the threshold signal from the output of block 9 to the control inputs of the trigger circuits 3,4 on their single outputs there appear signals arriving at cxeiviy coincidence 5, as its output through the element OR 11 at the input of decision block 12. If the magnitude of random signals received at the outputs of integrators 2 is less than the threshold output signal -J-block 9,on the zero outputs of the release schemes. 3 and 4 signals appear that are fed to the coincidence circuit 6, and its output through the element OR 11 — to the input of the decision block 12. The signal from the output of the adder 7 is fed to the input of the additional integrator 8. The smoothed value of the signal from the output of the integrator 8 goes to the input of block 9 and, from its output, to the control inputs of the release circuits 3 and 4. The decision block 12 counts the signals arriving at its input and outputs a signal about the quality of the channel. In the proposed device, the operation speed is significantly increased while simplifying and reducing its cost. Formula Fig. Device for controlling discrete communication channels, containing a coherent correlation receiver with two integrators, the output of which one is connected to the corresponding inputs of two matching schemes, as well as the additional integrator, that, in order to increase speed, an adder and a scaling unit were entered into it, with the outputs of the integrator of the coherent correlation receiver through a sequentially connected adder, an additional integrator and Lok tasshtabirova11i yushim connected to control inputs trigger circuits. Sources of information taken into account in the examination of the invention: 1. Copyright certificate in the USSR}, 293303, Y 04 J 3/14, 1969. 2. USSR author's certificate No. 3468О4, Н 04 В 3/46, 1970.