SU800993A1 - Multichannel relay-type radio pulse correlometer - Google Patents

Description

the correlometer, the output of the polar discriminator is connected to the information input of a digital delay line, the outputs of which are connected to the second inputs of the corresponding relay multiplication units, the outputs of which are connected to the inputs of the corresponding integrators, the control inputs of the digital delay line are connected to the corresponding outputs of the digital clock generator group, are entered zeroing keys, envelope threshold element, shift register, the information input of which is connected to the output of the bend threshold element input, which is connected to the input of the correlometer, control input of the shift register com1; inn with (Yt -) - tA additional output of the clock generator, outputs of the shift register are connected to the control inputs of the corresponding zeroing keys, the information inputs of which are connected to the outputs of the corresponding relay multiplication blocks and the outputs are connected to the zero potential bus ..

FIG. 1 shows a correlometer structural diagram; in fig. 2 - time diagrams of voltage at various points of the correrelometer (a is the voltage at the input of the correlometer, b is the voltage at the output of the polarizer discriminator 1, C is the voltage at the output of the first delay line element 2 g, the voltage at the output n of the delay line element 2, d - voltage at the output of the threshold envelope device 8, e - voltage at the output of the clock pulse generator 3, W voltage at the first output of the shift register 7, 3 - voltage at the m output of the shift register 7).

A multi-channel relay correlometer, a radio pulse contains a polar discriminator 1, whose input is the input to the correlometer, and the output is connected to the input of a digital line

2 delays, the control inputs of which are connected to the output of the generator

3-stroke pulses, a. the outputs of the digital delay line 2 are connected to the first inputs of the multiplication relay units 4. The analog inputs of the relay multiplication units 4 are combined with the input of the correlometer, and the outputs are connected to the inputs of the integrators 5, the outputs of which are the outputs of the correlometer, and with the analog inputs of channel zero switches 6, and the control inputs of the channel switches

6 bumps are connected to the corresponding shift register outputs.

7, the clock input of which is combined with the generator output of 3 clock pulses, and the signal input of the register

7 is connected to the output of the threshold element 8 of the envelope, the input of the latter is connected to the input of the correlometer.

The correlometer works as follows.

When a radio pulse signal arrives at the input of the correlometer, it is fed to the input of threshold element 8 of the envelope to the analog inputs of relay-multiplication blocks 4 and to the input of polar discriminator 1, from the output of which the clipped signal is fed to the input of the digital delay line 2. Control Digital line 2 delay line inputs clock pulses from the generator output 3 clock pulses and from the digital line 2 delay lines outputs a clipped delayed signal is fed to the control inputs of relay blocks 4 multiplications from the output and whose voltage is clipped yuschees multiplying the result delayed by a radar pulse signal supplied to the inputs of the integrators 5, wherein 5 to the inputs of integrators connected analog input channel keys used zeroing. The channel zero reset keys 8 are closed and the integrators 5 are zeroed all the time until the control inputs of the channel zero keys are received from the corresponding outputs of the shift register 7, the clock input of which receives a signal from the generator output 3 clock pulses the signal input of the shift register comes a signal from the output of the threshold element 8-envelope. Thus, the threshold in the threshold envelope element 8 has not yet been exceeded, the inputs of the integrators 5 are zeroed, and when a radio pulse signal appears at the input of the correlometer and the threshold in the threshold element 8 of the envelope is opened, the zero zero keys are broken, and successively in accordance with the register signals 7 shift, which in turn correspond to the passage of the radio pulse signal through the digital delay line 2.

The proposed structural scheme of a multichannel relay correlometer makes it possible to increase the accuracy of calculating the correlation functions of radio pulse signals. Moreover, the accuracy of calculating the correlation functions does not decrease with an increase in the delay time, which is especially important when studying the correlation characteristics of radio impulse signals with durations compared to the delay time. Until the threshold in the threshold envelope device was exceeded and the output of the shift register did not receive control signals with a shift corresponding to the channel number to the corresponding zero keys, the integrator inputs were reset. This makes it possible to increase the accuracy of calculating the correlation functions of the radio pulse signals by eliminating the low-frequency fluctuating interference caused by the multiplication of the radio pulse by the clipped interference at the outputs of the integrators with a fundamentally limited averaging time.

Claims (2)

1.ZHOVINSKY V.N. and Arkhovsky V.F. Correlation devices. Moscow, Energie, 1974, p. 147. 2. Gribanov Yu.I. and others. Automatic digital correlators. M., Energie, 1971, p.71. Jlii / UW naf4 / wivftftivlW / vA L DL ll / - t i: well