SU1030978A1 - Device for receiving telemetry data with autoselection - Google Patents

Abstract

A DEVICE FOR RECEIVING A TELEINFORMATION WITH THE MT SELECT, containing the first and second receiving paths, each consisting of a serially connected receiver, demodulator and key, a control unit, the first and second outputs of which are connected to the control to the main inputs of the keys, respectively, the first and second receiving paths, the outputs of the keys of which are combined and connected to the information input of the output unit, about and in order, in order to increase the noise immunity of the reception of teleinformation under the action of impulse noise, in each receiving path control key and inverter, first and second control signal counters, switching latching unit, prohibition signaling unit, interference level determining unit, resetting signal generating unit and time delay unit, in each receiving path the demodulator is connected to the control key input, the control input of which through the inverter is connected to the control key, the outputs of the keys of the first and second receiving paths are connected to the combined inputs p The first counter of control signals and the switching latch unit, the control input of which is connected to the third loudspeaker of the control unit, and the output through the prohibition signal generating unit whose control input is connected to the output of the interference level detection unit, are connected to the key outputs Comte (Lol signals of both receiving paths are connected to the combined time and the second counter of control signals, the output of which is connected to the control input of the unit Board, and the reset input is combined with the input .bloka determining interference level n .Connect to the output of the reset signal generating unit, first oyhod: about about; of | the CONTAINER signal counter is connected to the combined control inputs of the reset signal generation unit and 1 time delay unit and the output of which is connected to the control input of the reset signal generation unit. thirty

Description

FIELD OF THE INVENTION The present invention relates to radio quality and can be used when channeling teleinformation.

A device for receiving information on two channels with a selective auto selection is known, containing the first and second receiving paths, each consisting of a serially connected receiver, a demodulator and a key, the control unit, the first and second outputs of which are connected. These are connected to the control inputs of the keys, respectively, of the first and second receiving paths, the key outputs of which are combined and connected to the information input of the output til block.

However, the device does not provide noise immunity when receiving teleinformation under conditions of impulse noise.

The purpose of the invention is to improve the noise immunity of receiving telecommunication information under the action of impulse noise.

The goal is to achieve that in a device for receiving information with auto-selection, containing the first and second receiving paths, each consisting of successively connected receiver, demoler and key, control unit, the first and second outputs of which are connected to the control inputs of the keys, respectively , the first and second receiving paths, the outputs of the keys of which are combined and connected to the information input of the output block, are entered into 1: the auxiliary control key and the inverter, the first and second sec Control signals, blocking switching unit, prohibition signal generating unit, interference level determining unit, reset forming unit and time delay unit, in each receiving path the demodulator output is connected to the control key input, the control input of which is connected via an inverter to the input key control, the outputs of the keys of the first and second receiving paths are connected to the combined inputs of the first counter of control signals and the switching latching unit, the control input of which is connected It is connected to the output of the interference detection unit, connected to the control input of the output unit, the outputs of the keys of the control signals of both receiving paths are connected to the combined inputs of the time delay unit and the second counter of control signals. signals whose output is connected to the control input of the control unit, and the reset input is combined with the input of the noise level determination unit and connected to the output of the generation unit a reset signal output 5 of the first counter control signal inputs connected to the combined control signal generating unit and a reset unit time delay, the output of which is connected

0 to the control input of the reset signal generation unit.

The drawing shows the structural electrical circuit of the proposed device.

5 A device for receiving teleinformation with an auto-selection comprises receiving paths 1 and 2, each consisting of receiver 3, demodulator 4, key 5, key b of pilot signals

Q and inverter 7, control block 8, output block 9, first counter of control signals 10, second counter of control signals 11, switch latching block 12, prohibition signal generating unit 13, noise level determining unit 14, reset signal generating unit 15 and block 16 time delay.

The device works as follows.

 Information messages in code form from communication channels are in parallel received at the inputs of receiving paths 1 and 2. Receivers 3 of each receive path select the rto signals of the address part and form them. In demodulator 4, the received signal is demodulated and checked, for example, by parity. After verification, a control signal is added to the correctly received code signal. Code messages, including control signals, from the output of the receiving path of the best quality, for example path 1, through the public key 5

5 are received successively in the output unit 9, the address words in the switch fixation unit 12, and the first counter 10 counts the control signals of the received messages. At the same time, through the open switch 6 of the control signals of the receiving path 2, the inputs of the second counter 11 and block Г 16 of the time delay are received by themselves. control signals of the second receiving channel of the worst quality, informational messages on which are not accepted, so that its key 5 is closed.

The control signals begin to count simultaneously by the counter 10 and the time delay unit 16, and the second counter 11 for the delay time is locked by the signal of the reset signal generating unit 15 supplied to the reset input. After a predetermined number of pilot signals, which is selected depending on the number of allowable disappearances of pilot signals when evaluating receiving paths, the block 15 generating a reset signal removes the blocking from the Reset input and counter 11 starts counting the control signals of the receive path 1. After the specified arbitrary count cycle has been counted the end of the counter 10, if the calculated number of control signals of the first path is greater than the number of control signals calculated from oromu path counter 11, resets through block 15 is not generated until the end of the counter 11 and the time delay unit 16, after which the frame cycle is repeated. 4 If the number of control signals in the second path, counted by counter 11, taking into account its delay, is greater than the number of control signals counted in the first path of counter 10, then the count 11 that has counted to the end gives a signal to control unit 8, - which closes the keys 5 and 6 of the receiving path 1 and opens the keys 5 and b of the receiving path 2, i.e. happening ne | Turn on the reception of information on the second path. Similarly, the reverse switching from the second to the first path occurs. Considering that the reception of information on paths can occur with a time shift due to delays in the equipment of the communication channel, due to the non-identity of their characteristics, in output block 9, a full address word can be received via the newly connected receiving path and, as a result, distorted informational message. To prevent this, the device provides a switching fixation unit 12, which from the moment of issuing a signal to switch paths from block 8 to receiving a signal with the correct address word in the next cycle, issues a signal to block 13, prohibits the issuance of information. Thus, after switching over to the best path, information on the EOM path is output to the output nodes only after the correctly received address word. There may be cases when there is a high level of interference in the channels of the paths, which goes beyond the allowable values, or as a result of a linear fault; Nodes receive a false reception of code messages, which indicates a malfunction of the device. To detect these faults, the device has a jioMex level detection unit 14, which detects a decrease in the control signals of the best path below the permissible limit. With a decrease in the number of control signals in messages from the output of the best receiving path, it is delayed by. The time cycle of their counting, which is completed by the signal of the reset from the output of block 15. A certain number of pulses from the generator of theists, which are counted by this block, are fed to the first go of block 14, and the second input is the signal from the block 15 that generates a reset signal. If the end of the cycle of reference control signals counters. 10 or 11 comes before the readout by block 14 of a certain number of clock pulses, then the signal from the output of block 15 block 14 blocks and does not issue, in turn, a signal to block 13 to prohibit the release of information. If it turns out that the clock cycle is shorter in terms of the control signal cycle from the Best quality channel, then the output of the interference level determining unit 14 generates a signal that goes to unit 13. The output signal of unit 13 prohibits the output of information from output block 9. The repetition of prohibitions indicates a high level of interference in the channels or the malfunction of both receiving paths. The proposed device for receiving teleinformation with an auto-selection has a higher tolerance, as it allows the fault and automatic switching of reception paths not only at high levels of interference in the communication channel, but also under the effect of impulse noise, which leads to distortions code messages.

Claims (1)

DEVICE FOR RECEIVING TELEINFORMATION WITH AUTO SELECTION, containing the first and second receiving paths, each consisting of a series-connected receiver, demodulator and key, a control unit, the first and second outputs of which are connected to the control inputs of the keys, respectively, of the first and second receiving paths, key outputs which are combined and connected to the information input of the output unit, characterized in that, in order to increase the noise immunity of receiving teleinformation under the action of pulsed noise, are introduced into each the receiving path, the control signal key and inverter, the first and second control signal counters, the switching latching unit, the inhibit signal generating unit, the interference level determining unit, the reset signal generating unit and the time delay unit. Moreover, the demodulator output is connected in each receiving path • to the input of the key of control signals, the control input of which through an inverter is connected to the control input of the key, the outputs of the keys of the first and second receiving paths are connected to the combined inputs of the first counter to the control signals and the switching fixation unit, the control input of which is connected to the third output of the control unit, and the output through the inhibit signal generation unit, the control input of which is connected to the output of the interference level determination unit, is connected to the control input of the output unit, the outputs of the control signal keys of both receiving paths are connected to the combined inputs of the time delay unit and the second control signal counter, the output of which is connected to the control input of the control unit, and the reset input is It is connected to the input / block of the determination, the interference level and is connected to the output of the reset signal generating unit. The output of the first control signal counter is connected to the combined control inputs ^: the reset signal generating unit and the time delay unit, the output of which is connected to the control input ^ reset signal generating unit. '<1 X