SU822140A1 - Device for determining pulse time position - Google Patents

Description

one

The invention relates to a radar technique and can be used in the implementation of automatic tracking systems operating according to information encoded in the temporal position of the pulse relative to the middle of the observation interval.

A device for determining the position of a pulse relative to the middle of the observation interval is known, based on the time discrimination of JL.

However, when implementing the following gauges, along with the task of obtaining high measurement accuracy, it is necessary to ensure high reliability of tracking, which is achieved by determining the position of the pulse on the time axis not by temporal discrimination, but by temporary fixation.

It is also known a device for determining the temporal position of pulses with temporary fixation relative to the beginning or end of the observation interval, which includes a linear-change generator.

generator voltage, selector pulse generator, coincidence elements 2

However, this device has an insufficient accuracy of fixation, which is associated with the influence on the operation of the device of the parameters of pulses, and structural complexity.

The purpose of the invention is to improve the accuracy and simplify the design of the device.

This goal is achieved in that the device for determining the temporal position of the pulses, containing the Threshold Level Shaper, the input and output of which are connected to the inputs of the co-generator, the sensor of observation intervals and the integrator, has a voltage switch, the controlled inputs of which are connected to the outputs the comparator and the sensor of the observation intervals, and the outputs of the reference voltage switch are connected to the signal inputs of the integrator, the control input of which is connected to the output of the sensor of the observation intervals.

Fig, 1 shows the structural diagram of the proposed device; in fig. 2 time diagrams for his work.

The device for determining the temporal position of the pulses contains a threshold level generator 1, a comparator 2, a sensor 3 for observation intervals, a switch 4 for reference voltages, and an integrator 5.

The device works as follows.

The output voltage Uc ((Fig. 2a enters the input of comparator 2, where it is compared with the obtained threshold voltage and n (b) (fig. 2d) coming from the output of the forcing device to the second input of the comparator. From the output of the comparator, the voltage llK. ( Fig. 26) is fed to y; the correct input of the switch 4 is the reference voltage, the second controlled input of which and the controlled input of the integrator 5 with a reset receive clock pulses and / It) (Fig. 2B) from the sensor 3 observation intervals.

With the start of observation, if no signals are detected from the first output of switch 4, the positive voltage is removed; J LM A (Fig. 2g), the amplitude of which remains unchanged until the signal tl is detected ((Fig. 2.c). , the signal detection point (the leading edge of the pulse crosses the threshold level (Fig. 2 e), U (i becomes and remains equal to zero until the end of the observation interval. The voltage U g M at the second output of switch 4 is constant and equal to zero until it crosses the rear the pulse front of the threshold level t 2 (Fig. 2, a). At the moment L 7, U 7 (t) at imaet value A (Fig. 2e), which remains constant until the termination of the observation interval. Eg the same) and the switch 4 outputs supplied to signal inputs of the integrator 5

with a reset. As a result of the integration, at the end of the observation interval, the voltage at the output of the integrator and J, l-t) (Fig. 2, e), the magnitude and sign

which is proportional to the position of the pulse relative to the middle of the interval of observation.

A device for determining the temporal position of the pulses is thus

realizes a method of temporary fixation on both fronts, which allows reducing the influence of the amplitude and shape of the pulse peak on the accuracy of determining the position of the latter, eliminating the dependence

device operation.

Claims (2)

1.Mit Shev B.N. Determination of the temporal position of pulses in the presence of interference M., Sov. radio, 1962, p. 86 2. Search, detection and measurement of signal parameters in radio navigation systems. Ed. Yu. M. Kazarinov. M., Sov. Ratio, 1975 p. 231, fig. 7166. U () - i (t-i: i} -i (tt2} r ( ui.l