SU616650A1 - Arrangement for checking telemetry information validity - Google Patents

Description

(54) CONFIDENCE FOR MONITORING THE RELIABILITY OF TELEMETRIC INFORMATION

the bodies are connected via a block determined by the institute of parameter deviations to the first group of inputs of the distributor; with the corresponding inputs of the OR element, the output of which is connected to the input of the detector of the level of an insane, the first group of outputs of the block of meters is connected respectively to the second a group of inputs of the subtraction unit; the second group of outputs of the counter unit is connected to the corresponding inputs of the signal level detector and the nonlinear distortion evaluation unit.

In the drawing given a block diagram of the proposed device.

It contains information block 1, analyzer 2, block 3 for determining deviations of parameters, analog-to-digital converter (ADC) 4, block

5 processing information, distributor b, decoder 7, signal level detector 8, counter block 9, nonlinear distortion estimation block 10, subtraction block 11, element OR 12, noise level detector 13.

The device works as follows. The signal carrying the telemetry information from the output of the information unit 1 is directly fed to the input of the information processing unit 5. The control signal from the output of the information block 1 is fed to the input of the A / D converter 4. The conversion is performed on the interval of each signal sent from the information block 1. The number of most significant bits is received by an equal number of bits of the control signal, transmitted ED; from a telemetry object. The signal containing the most significant bits is deciphered by the positions determined by the code combining of the most significant bits in the decoder 7 and controls the distribution of the lower bits in the distributor b. The signal containing the lower bits from the output of the ADC 4, carrying information

The 06 level of noise, distortion and interference through the block 3 for determining the deviations of parameters is fed to the signal input of the distributor 6 and further

into a block of counters 9 for averaging and B a block of subtraction 11 for centering relative to the average value. In block 3 for determining the deviations of parameter 9c, the deviation of the input to the block input, then forward, then in the reverse code, depends on the sign of the deviation. The output of block 3 determines the deviations of the deviation parameters

presented in a single form, for example in the direct code. The elder of the group of younger bits carries information about the sign of deviation, and the remaining younger bits contain information about its magnitude. In counter block 9, the deviations are averaged over a time interval separately for each position of the pilot signal. Therefore, the possibility arises in detecting both the signal level in block 8 and the evaluation of nonlinear distortions in block 10 to extract additional information during processing. By detecting the signal level in block 8, for example, not only the measurements of the scale (the distance between the extreme positions) of the signal, but also its level, as well as changes in the parts of the scale corresponding to the distance between the individual positions, can be determined. In block 10, instead of the previously determined nonlinear distortion coefficient, there arises the possibility of not only rms nonlinear distortion, but also revealing the nature of this distortion: due to more or less the same distortion of all positions, etc. In this connection, it is possible to attach the detected distortions to the place of the telemetry path, where they arose, for example, nonlinear distortions introduced by the radio link at the appearance of multi-beam reception / nonlinear distortions, and nonlinear distortions, are easily distinguished. due to limited 1 in the receive-transform path. In subtractor 11, the deviations are centered on average values, i.e. the constant component due to non-linear distortions is excluded. After combining the OR 12 element, all deviations, which now contain only the random component, go to the noise level detector 13, where the dispersion or other noise characteristic is calculated.

The results of the detection of signal noise and nonlinear distortions are fed to analyzer 2, which compares the levels of the claim, the effects of various types with given thresholds. When one of these thresholds is exceeded, an invalid signal is sent to information processing unit 5 with the index of the most likely location of the source of the distortion.

The proposed device allows to increase the accuracy of the reliability assessment and significantly expand the class of tasks being solved, compared to the prototype, in particular, to produce not only an assessment of various types of distortions when determining the reliability

The telemetry information being processed, but also localize these distortions in the telemetry path. The discovery of the location of the sources of errors introduced in the transmission of telemetry information will allow the adjustment of the parameters of the path or change the operating modes of the equipment in order to adapt to the changed external conditions.

Claims (1)

1. USSR author's certificate; 237645, cl. G08 C 25/04, 03/25/68. 2, USSR Author's Certificate No. 372575, cl. Q08 25/04, 12.06.72.