SU488244A1 - Encoder for transmitting telemetry information - Google Patents

Description

one

The invention relates to telemetry and is used to transmit information in multichannel telemetry systems with enhanced noise immunity.

Known encoders for transmitting telemetry information, containing a synchronizer connected in series, the first converter "analog-code and sum modulator" 2, one of the outputs of the synchronizer connected via an L-channel switch to the corresponding input of the first converter, and the other output of it to the input of a pseudo-random sequence generator. However, these devices are not reliable enough.

The purpose of the invention is to increase the reliability of the device in operation.

The proposed device includes an L-channel switch, a second analog-to-converter converter, a quantization level number decoder, an OR circuit and a p-1 generator of random random sequences, with the additional synchronizer output connected to the corresponding jV-channel and M-channel inputs, output of the latter, through the second converter, the analogue code is connected to the signal inputs of the decoder of the quantization level numbers, each of the n outputs of which is a corresponding pseudo-oscillator This sequence is connected to the input of the OR circuit, the output of which in turn is connected to the input of the adder, and the corresponding synchronizer output is connected to the control inputs of the p generators of the pseudo-random sequence.

The scheme of the coding device shown pa drawing.

The encoder for transmitting telemetry information contains synchrop 1, the first output of which is connected to one of the inputs of jY-channel switch 2, the second output - to another input of switch 2 and to one of the three inputs of the analog-code converter 3. The output of the switch 2 through the converter “Analogue code 3 is connected to one of the two inputs of the modulo adder“ 2 4, and the third and fourth outputs of synchronizer 1 are connected to the corresponding inputs of the L1-channel switch 5 and converter “anavior-code 6; t outputs of the converter "analog-code 6, respectively, are connected to t inputs of the descrambler 7 numbers of quantization levels, each

from the n outputs of this decoder is connected to the input of one of the n pseudo-random sequence generators, and the output of each generator 8 through the logic circuit “OR 9 and the second input of the modulo 2 4

connected to the output of the device.

The encoder works as follows. Synchronizer 1 generates the signals FO of the polling channels and the impulses of the channel frequency FK FON, which control the operation of the L-channel switch 2. Switch 2 in series for the time Tc - connects each of the N channels to

to analog-to-3 converter. Conversion accuracy is determined by the frequency produced by synchronizer 1. From analog-to-3 converter output, the information code combinations in the serial binary code go to modulo 2 4 under the influence of control signals, respectively the following frequencies F and fn

time 4 - connects each of M to / to

Stropping parameters to the analog-code 6 converter input. Thus, B, for the duration of Tk of each of the L slowly changing parameters, the M is polled for additional fast-changing parameters, whose channel intervals are equal. In the analog-code converter 6, the instantaneous values of each of the M parameters are converted into a binary-digit code. The accuracy of this conversion is determined by the frequency / Fo-NM-tn produced by synchronizer 1. From the analog-code 6 converter output, the information code combinations in the parallel binary t-bit code arrive at the input of the decoder 7, and the signal is generated at that number output, in which number of the level at the time in question is the given of M parameters. The number of outputs of the decoder is determined by the ratio. The signal arising at one of the p outputs of the decoder 7, excites the corresponding generator 8, and at its output under the influence of clock pulses with the frequency fo Fo-N-M-n a pseudo-random sequence of n elements and duration IK is formed. Consequently, in the structure of the corresponding

The pseudo-random sequence contains information about the number of the quantization level in which this rapidly changing parameter is located. From the output of the generator 8, the pseudorandom sequence signal through the logic circuit OR 9 bitwise arrives at the input of the adder modulo 2 4, where each pseudo-random sequence with the binary symbols of the information code combination of a slowly varying parameter is summed. At the output of the modulo 2 4 adder, a full telemetric signal is generated, which carries information about N slowly and M quickly

iupi1s parameters.

Claims (1)

Invention Formula Encoder for transmitting telemetry information containing serially connected synchronizer, first analog-code converter and modulo-2 adder, with one of the synchronizer outputs connected via a V-channel switch to the corresponding input of the first converter, and the other output of the generator pseudo-random sequence, characterized in that, in order to increase the reliability of the device in operation, an M-channel switch, a second analog-to-code converter, a decryptor, are introduced into it a quantization level number indicator, an “ILR1 and p-1” pseudo-random sequence generator, with the additional synchronizer output connected to the corresponding L-channel and L1-channel switches, the output of the latter through which the analog-code is connected to the signal to the inputs of the decoder of the quantization level numbers, each of the n outputs of which is connected via an appropriate pseudo-random sequence generator to the input of the OR circuit, the output of which in turn connected to the input of the adder, and the corresponding output of the synchronizer is connected to the control inputs of the p generators of a pseudo-random sequence. Output