SU1137487A1 - Lagger function generator - Google Patents

Abstract

LAGERRA FUNCTIONS GENERATOR, i-containing pulse generator and the main formation channel of a scientific research institute consisting of N series-connected forming blocks, where N is the maximum order of Laguerre functions, the first forming block consists of series-connected integrator and a buffer cascade, each of the other forming blocks contains an orthogonal filter, made in the form of serially connected RC - quadrupole and buffer cascade, characterized in that, in order to increase the manufacturer Due to the formation of Laguerre functions with a variable scale factor while maintaining their orthogonality, it additionally contains frequency dividers and additional oscillation shaping channels, each of which consists of sequentially connected forming units, the first forming unit in each additional channel includes sequentially connected integrator and the buffer cascade, each of the other forming blocks contains an orthogonal filter, made in the form of a -sequentially connected RC is a quadrupole and a buffer cascade, the integrator inputs of all oscillation channels are connected to the generator output i pulses through the appropriate frequency dividers, the number of forming blocks in each additional form channel (the oscillation mode is equal to the number of this additional channel forming the oscillations, the generator outputs are outputs the last forming blocks of the additional channels of the formation of oscillations and the outputs of the forming blocks with numbers from N / 2 to N of the main channel of the formation oscillations, the number of additional Nl oscillatory channels 4; is determined from the ratio N / 2 and 00 N - 1 J -2-, respectively, for the even and odd number of Laguerre functions generated by the generator.

Description

one

The invention relates to specialized computer aids and can be used in radio engineering and communications equipment to generate complex oscillations described by Lugger functions.

Known function generator, providing the formation of temporary functions: sinusoidal, exponential, logarithmic, trigonometric, hyperbolic J

However, the known device has a complex structure and the oscillations that are formed at the same time occupy a wide 9OLOS frequency.

The closest in technical essence to the present invention is the Laguerre function generator, which contains a pulse generator connected in series and a channel node having N series-connected (gr, e N.) Number of functions generated by the channel block generator, the first of which includes the sequentially connected integrator and the buffer the cascade, from the output of which the oscillation described by the Laguerre function is of the zero order, and (N - 1) of the subsequent channel blocks are connected in series crossed four-field wilted on the RC - elements and buffer stage, the output of which is removed oscillations described by a function of Laguerre The corresponding order (depending on the number of channels) 2j.

The disadvantage of this generator is the low time loading of channels when used in multichannel systems with carriers that are described by the Laguerre functions,

The aim of the invention is to increase productivity by forming Laguerre functions with a variable scale factor while maintaining their orthogonality.

The goal is achieved by the fact that the generator of Lager.ra functions, which contains the pulse generator and the main channel of formation of oscillations, consists of N series-connected forming blocks, where N is the maximum order of the functions being formed, Laguerre, the first forming block consists of series-connected integrator and a buffer cascade, each of the other forming blocks contains an orthogonal 7487 .2

A new filter, implemented in the form of a series-connected RG-four-port network of the buffer cascade, introduced frequency dividers and additional oscillation channels, each. of which consists of sequentially connected forming units, the first forming unit in each additional channel includes, after Q, a consistently connected integrator and a buffer cascade, each of the remaining forming units contains an orthogonal filter made in the form of a serially connected RC three-port network and a buffer cascade, with inputs integrators of all channels of formation of oscillations through the corresponding frequency dividers are connected to the output of the impulse generator, the number of forming blocks in each th supplemental channel forming fluctuations equal to the number of the supplemental channel forming vibration generator outputs are the outputs of blocks forming the last additional oscillations generating channels and outputs forming blocks numbered from N / 2 to form primary channel fluctuations, the number of oscillations dopolnitelnnh forming channels is determined by

from the ratio N / 2 and ---, respectively, for an even and odd number of Laguerre functions formed by the generator.

Figure 1 shows the functionality. on the Laguerre function generator circuit; 2 shows the graphical dependence of the vector functions from zero to

0 third order; FIG. 3 is a table of results of calculating the magnitude of the orthogonality interval of carriers of the type of Laguerre functions with a different number of channels.

5 Using the example of a four-channel version, the Laguerre function generator contains three channels: the main one and the additional 2 channels of vibration formation. The main channel 1 has

0 four consecutively connected forming units, of which nepBbrii includes a sequentially connected integrator 3 and a buffer stage 4, the output of which oscillates,

5 are assigned by the Laguerre function of zero order, and the second, third and fourth are connected in series crossed quadrupler 5 on RC elements and buffer cascade 6, the output described by the Laguerre functions of the first, second and third order, respectively, is removed from the output of each of them frequency divider 7. The second additional channel for the formation of oscillations has two series-connected forming units, the first of which includes the sequentially connected integrator 8 and the buffer cascade 9, and the second one - nennye sequentially crossed .chetyrehpolyusnik buffer stage 10 and buffer 11. Outputs of stages 9 and 11 are removed oscillation described Laguerre functions of the zeroth and first order. There is also a pulse generator 12, and the first additional oscillator has one unit, consisting of integrator 13 and a buffer stage 1, the oscillation described by the Laguerre zero order function is detected. The generator works as follows. . When turning on the power from the output of the generator 12, the pulses arrive at the inputs of frequency dividers 7. The division factor of the dividers K is selected, depending on the number of additional channels and the pulse frequency in the main channel, to the following relation: L. 21 T fl. - J where X:, ..., X .. are, respectively, the length of the orthogonality interval L of the i-th additional and main channels; frequency of the time pulse generator; pulse frequency in the OtHOB channel; - the whole part of the relationship. In this case, the duration of the formed oscillations at the outputs of each channel will be different due to the varying scale factor OO and the definition of c for oscillations at the output of the i-th additional channel 1 7 oscillations at the output of the main channel t, N ,,. flL-Si-. Un V. The Laguerre function generator for the four-channel variant, which includes the main and two additional channels with a generator frequency of 12, equal to f, has a division factor of 50, and the dividers are 10 and 25. 7. The pulses from the output of the divider 1 totah are the frequency is fed to the integrator input. At the output of the integrator 13, oscillations are described, described by the Laguerre function of order zero (t). These oscillations, with a frequency of i, are fed through buffer cascade 14 to the output of the generator. The pulses from the output of the second frequency divider 7 with the following frequency are fed to the input of the integrator 8. From the integrator output, the oscillations described by the Laguerre zero order Jj (t) 4epe3 buffer cascade 9 is fed to the input of a crossed quadrupole 10, at the output of which oscillations are generated, described by the first order Laguerre function (t). These oscillations are followed at a frequency frt through buffer stage 11 to the output of the generator. The operation of the main channel is similar, the oscillations described by the zero and first order Laguerre functions are not fed to the generator, and only the oscillations described by the second and third order Laguerre functions are recorded. The use of the invention allows the creation of oscillators of carrier oscillations, which provide an increase in the capacity of communication channels due to the maximum temporary load. In particular, for the four-channel variant, the generator on the same clock interval forms nine orthogonal carriers described by the Laguerre functions of zero, first, second, and third order.

At the same time, the orthogonality of the carriers described by the zero order Laguerre functions in the main channel is provided 5a by shifting in time by an interval equal to the pulse duration at the output of the divider 7 connected to the input of the first additional channel, and the orthogonality of the carriers described by the functions The first-order Laguerre, in the main channel, is provided by a time offset by an interval equal in magnitude to the pulse following period at the output of the 7d divider connected to the input second. o additional channel

Fig. 3 shows the results of calculating the value of the carrier orthogonality interval of the type of iLaguerre functions with an equal number of channels and allowance in the communication practice of noise: non-orthogonality less than 0.001. From these tables (Fig. 3 / and graphical dependencies (Fig. 2), it follows that with a constant scale factor in the known four-channel system using carriers of the Laguerre function type from zero to third order, the first and second channels are in insufficient temporary loading. With increasing number of channels (the number of functions generated by the generator), this circumstance is becoming more and more. On the graphs on the abscissa axis boundary points are marked, the orthogonality point (points C).

By introducing the variable scaling factor "i yaj, (which is provided in the generator by changing the frequency of the pulses sent to the corresponding generator inputs on each channel — to form functions of the carrier of the appropriate order), more efficient use of the time interval, namely for 4-channel option based on the first channel

4 reserve channels can be additionally organized, on the basis of the second channel - 1 reserve channel (figure 2). At the same time, with an increase in the number of channels organized (the number of functions generated by the generator), the amount of gain increases, in particular, for the six-channel variant, the amount is 9 channels (/ on the basis of the first channel op-;

6 reserve channels are organized, on the base of the second one - 2, on the base of the third one - 1, for the G2-channel channel - 26 channels, for the 15-: channel channel - 35 channels (Fig. 3).

Thus, the use of the proposed generator will allow additional organization of a multichannel communication system based on 4 channels i 5 backup channels, based on 6-9, based on 12–26, based on 15-35 channels. Thus, the gain is 125 respectively; 150; 216.6 ;:

233.3%.,

The value of win is determined by the ratio:

, ..

Its whole part.

 Where

P

N v j

torn

V

i-f

/ 2Q

interbal

FIG. 2

Claims (1)

2. Mirsky G.Ya. Hardware determination of characteristics of random processes, M., Energy, 1971, p. 157, fig. 4-186 (prototype). [(54) (57) LAGERR FUNCTION GENERATOR, containing a pulse generator and a main oscillation channel, consisting of N series-connected forming blocks, where N is the maximum order of the formed Laguerre functions, the first forming block consists of a series-connected integrator and a buffer cascade, each of the remaining forming blocks contains an orthogonal filter made in the form of series-connected RC - a four-terminal network and a buffer cascade, characterized in that, in order to increase the productivity Due to the formation of Laguerre functions with a varying scale factor while maintaining their orthogonality, it additionally contains frequency dividers and additional oscillation channels, each of which consists of series-connected forming blocks, the first forming block in each additional channel includes sequentially connected integrator and a buffer cascade, each of the remaining forming blocks contains an orthogonal filter, made in the form of a series-connected RC - four of an auxiliary channel and a buffer cascade, and the inputs of the integrators of all the oscillation channels through the corresponding frequency dividers are connected to the output of the pulse generator, the number of forming blocks in each additional oscillation channel is equal to the number of this additional oscillation channel, the outputs of the generator are the outputs of the last forming blocks of the additional formation channels oscillations and outputs of forming blocks with numbers from N / 2 to N of the main channel of oscillation formation, the number of additional forming channel-negative oscillation determined from the ratio N / 2 and N - I 2 — respectively, with an even and odd number of Laguerre functions formed by the generator.