SU361445A1 - EU? UNION " - Google Patents

Description

one

The invention relates to radio engineering, in particular, to a technique for processing complex signals, for example, in communication systems, locations.

The known devices for optimal processing of complex signals with a large value of the FT parameters, where F is the signal frequency band and T is its duration, usually contain a multi-drop delay and 1 weighing 1 and s elements. In this case, the delay line taps are located

one

at time intervals - ur ur therefore

the amount should be equal to 2ft. For large values of 2FT (on the order of hundreds and thousands of hours), the technical implementation of such devices is difficult. Thus, ultrasonic delay lines should have a large number of transducers, in each of which a significant attenuation of the signal occurs. When amplifying a signal to compensate for attenuation, phase distortions occur. The delay line on annular magnetic carriers also requires a large number of minimum-sized heads.

Also known are discrete-analog optimal processing devices containing a key element, a multi-tap delay line, a matrix of weighing elements, switching elements and drives. In these devices, a large number of switching elements are used.

The aim of the invention is to improve the device and reduce signal distortion.

when summing up.

The goal has been achieved due to the fact that the outputs of the first multi-branch delay line are connected to the vertical tires of the matrix of weighing elements, and horizontal lines of the matrix of the weighing elements are connected to the corresponding taps of the second delay line. The latter is composed of adders with two inputs connected in series through delay lines, the total delay time in the second multi-drop line being equal to the time delay between adjacent branches of the multi-drop delay line.

FIG. 1 is given the block diagram of the proposed

devices; in fig. 2 - summing delay line, option.

The device circuit contains: multi-branch delay line /, summed line; delay; weighing elements; adders to two inputs 4. and delay lines 5.

The output voltage 6out (f) is analogous to a linear optimal filter, whose pulse response 4 (t) is different from zero, in the interval About t T means: U (t -} -fi {) d, I (1) U; n (t - T) T; (-) dt / T, where 6, x (, 0 is the voltage at the input of the filter, it exists from time 0 and is the sum of the useful signal of finite duration T and additive interference. If the coefficients are non-distributive weighting elements / o; 4i ; ... correspond to the extremes of the impulse response n (t), spaced by 4g --- time intervals, the filter output section has yt /, x (/ - Mt) 7, and, .0., 7c , x (l Vt / ,, x (- / gd)%, k N N - - 2FT; Tji, Ti (ftAc). In this device, when the number of sampled values of the impulse response is equal to N, the t-tap delays with total in belt delay equal to T, and t (; L. The input signal enters the t-reject lipia delay /, whose taps are arranged through time. The voltage from the first retraction lppn (without delay) goes to the transmission devices, whose transmission coefficients are proportional to the values / i; i... p, where the value "is determined from the concurrence of L / n / g. Similarly, the incidence from the second tap of the line (delayed in the line for the time d4g) coincides with the weighing devices, whose transmission coefficients are ,,; , H-I; ; // Thus, the scheme includes / g of groups of weighing devices containing on m elements. The outputs of the transmitter units are combined within each group and connected to the corresponding inputs of summing delay line 2, and the signal delay in summing between adjacent branches, which are at the same time adjacent inputs of the line, is 4 tons. The input voltage, weighted with a cho value, goes directly to the output of the device. Input voltage cue with values of 1 h; ..., arrives at the output of the device with a delay, respectively, t; 24g; .. ; (-I) .f. Input voltage, vzvegiennye with the values; "; , l / m-ai; i2 «-i, arrives at the output of the device with a delay, respectively: (n + 1) At; (n - 2) Dt; .... (2 / g-1) Dt, Voltages at the output of the device at times, located at i, will have the following form: s (o) t / Bx (o) Tjo: Vyv (D-) in (D -) - 1o -1- t / Bx (o) - / ,; t / "Mx (H-) .--. U ,,) t, o + U ,, l {k - 1) D. | - / ;, + ... + in (D) t, -1 + f / B .. (o) -n ,,, So the device processes the input signal in accordance with the expression (2), using the delay line with the number of taps, significantly less than 2ft, and there are no switching elements. So, nanrpmer, for processing the signal .a with a value, you can use a multi-branch line with 50 taps for the delay time T and a summing line with 20 taps for the delay time -.-. Since the delay time in summing line is chosen to be significantly shorter than the duration of the signal T, the device is simpler than the known ones. FIG. 2 shows the construction of a summing line, in which adders 4 are used for two inputs and delay lines 5 for time -, rg. They are connected in series through adders. Inputs bl; Bh2; In- .. Bx „summing line connected to the corresponding horizontal tires of the matrix of weighing elements. The subject matter of the invention is 1. A device for optimal processing of complex signals, containing two multi-tap delay lines and a matrix of weighing elements, characterized in that, in order to attenuate the device, the outputs of the first multi-drop delay line are connected to vertical weights of the matrix of weighing elements connected to the corresponding taps of the second multi-split delay. 2. The device according to claim 1, characterized in that, for the purpose of reducing signal distortions during summation, the second multi-tap delay line is made as adders with two inputs connected in series through the delay lines, the total delay time in the second multi-drop line between adjacent taps., the first multi-line delay line ..

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