SU702329A1 - Device for handling a wideband signal - Google Patents

Description

one

The invention relates to radio engineering, can be used in radio communications and radar.

A wideband signal processing device is known that contains the main and two additional correlators whose inputs are combined, the output of the main correlator is connected to the adder directly, and the additional outputs through threshold blocks, the output of the adder is connected to one input of the subtraction unit directly, and to the other-- through limiter 1.

However, this device lacks the reliability of signal detection.

The purpose of the invention is to increase the reliability of the detected signal.

To do this, in the wideband signal processing device containing the main and two additional correlators, the inputs of which are combined, the output of the main correlator is connected to the adder directly, and the outputs are additional through the threshold blocks, the output of the adder is connected to one input of the i3b 4MTaifflH block directly, and .

to another, through the limiter, the inputs of additional correlators are connected to ω; the corresponding inputs of the adder.

FIG. 1 shows a structural electrical circuit of the proposed device, FIG. 2-4 - epures, according to the principle of its operation.

The broadband signal processing device comprises a main correlator 1, two additional correlators 2, 3, an adder 4, threshold blocks 5, 6, a limiter 7 and a subtraction block 8.

The device works as follows.

The first input of the adder 4 receives the direction from the main channel of the correlation processing of the correlator 1 (Fig. 2a, curve 9), and voltages from the additional channels of the correlation processing-correlator 2 and 3 arrive at the second and third inputs of the correlator; 2 a, curves 10 and 11, respectively). The resulting voltage at the output of the adder 4 so far: ano in FIG. 26. Levels at the output of additional channels, correlation processing of correlators 2

and 3 is chosen so that the odd side lobes of the resulting voltage at the output of ssmathor 4 decrease slightly more than two times compared with even side leipete correlation functions (Fig. 2a, curve 9). This condition is fulfilled at K = 0.41. The voltages from the additional correlators 2 and 3 are passed through the corresponding blocks 5 and 6 to the corresponding; total inputs of the adder 4 (their graphs are shown in Fig. 3a and 36, respectively). A graph of the output voltage of the adder 4 is shown in FIG. Sv, curve 12. So that the instability of the coefficient K does not cause remote factors; odd side lobes (fig. Sv, curve 12), it is necessary to take K 0.41. It is not necessary to choose a larger K value, since this reduces the signal-to-noise ratio at the output of the device. The output voltage of the adder 4 (Fig. Zy, curve 12) is fed to the first input of the subtraction unit 8, to its other input through the limiter 7 the voltage is applied, the graph of which is shown in FIG. Sv (curve 13). The resultant voltage at the output of the device is prefilled in FIG. four.

Claims (1)

Invention Formula The broadband signal processing device containing the main and two additional correlators, the inputs of which are combined, the output of the main correlator is connected to the adder directly, and the additional outputs through threshold blocks, the output of summation behind is connected to one input of the subtractor directly wherein, in order to increase the reliability of signal detection, the outputs of the additional correlators are connected to the corresponding inputs of the adder. Information sources, taken into account in examination i 1. USSR copyright certificate in application No. 2478830/09, cl. G 01 S 7/02, 1977. 5 -2