SU1068920A1 - Walsh function generator - Google Patents

Abstract

WALFSH FUNCTIONS GENERATOR, containing two counters, AND group, modulo two adder, trigger, first and second AND elements, the counting input of the first counter being a clock input to the Walsh function generator, the outputs of the first and second counters of the same name are connected to the inputs of the corresponding elements AND groups whose outputs are connected to the inputs of a modulo-two adder, the output of the trigger is connected to the first inputs of the first and second elements AND, the output of the overflow of the first counter; and the output of the modulo two adder to the second inputs of the first and second elements AND respectively, the output of the first element AND is connected to the input of the second counter, the output of the second element AND is the output of the Walsh function generator, characterized in that characteristics of the Walsh function generator, which consists in controlling the pause between successively generated functions, it contains a register, an adder, a third AND element, an OR element, and the information inputs of the bits of the register are connected to the information The output of the first element I is connected to the recording control input to the register, the outputs of the first counter bits and the inverse outputs of the register bits to the first and second i groups of the adder inputs, the outputs of which bits are connected to the inputs of the third (L element AND , the output of the third element AND is connected to the inputs of the installation of the first counter and the register to zero and to the first input of the OR element, the second input and output of which are connected respectively to the second input of the first element AND and to the counting input trigger at:

Description

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iNd Invention relates to automation and computing and can be used in communication systems and spectral analysis devices. A Walsh function generator is known that contains two counters, modulo-two elements, modulo-blockers (1 |. A disadvantage of the device is that the | | walsh function gene gene contains time intervals between individual functions, which reduces its performance characteristics .. The closest technical solution to the invention is a Walsh function generator containing two counters, a group of elements AND, a modulo two adder, a trigger, two elements AND, the input of the first counter being a clock input of the generator The functions of the Usmsha, the outputs of the same bits of the first and second counters through the corresponding elements And connected to the inputs of the modulo two adder, the output of the trigger is connected to the first inputs of the first and second elements And, the second input of the first element And connected to the output of the older bit of the first counter , the output of the first element And is connected to the input of the second counter, the second input of the second element And is connected to the output of the modulo two adder, and the output of the second element And is the output of the Walsh 2 function generator. generator is that the pauses between successively generated Walsh functions are equal to the period of functions. This leads to partial simple equipment coupled with the generator during a pause, i.e., to a decrease in the operating characteristics of the generator. The purpose of the invention is to improve the performance characteristics of the Walsh function generator, which is to control the pause between successively generated functions. qi mi. The goal is achieved by the fact that the Walsh function generator contains two counters, a group of elements And, a modulo two adder, a trigger, the first and second elements AND, and the counting input of the first counter is a clock input of the generator: Walsh functions, outputs of the same name the first and second counters are connected Hbi with the inputs of the corresponding elements And; the groups whose outputs are connected to the inputs of the modulo two adder, the output of the trigger is connected to the first inputs of the first and second elements, the output overflow of the first counter and the output of the modulo adder two are connected to the second inputs of the first and second elements, respectively, the output of the first element And it is connected to the input. 4 of the second counter, the output of the second element And is the output of the generator function of Walsh, contains a register, adder, the third element AND, the element OR, and the information inputs of the register bits are connected to the information inputs of the generator of Walsh functions, the output of the first element AND is connected to the control input records in the register, the outputs of the bits of the first counter and the inverse outputs of the bits of the register are connected to the first and second groups of inputs of the adder, the outputs of the bits of which are connected to the inputs of the third element I, the output of the third element AND connected to the inputs of the installation in zero of the first counter and register and to the first input of the OR element, the second input and output of which are connected respectively to the second input of the first element And to the counting input of the trigger. The drawing shows the functional diagram of the generator of Walsh functions. The generator contains counters 1 and 2, the element And 3, the adder 4 modulo two, the trigger 5, the elements And b and 7, register 8, the adder 9, the element And 10 and the element OR P. The generator of Walsh functions works as follows. The generation of the next Walsh function begins with the supply of the next first clock pulse to the counter, which. is a shaper of Rademacher functions. Trigger 5 is in one state, on the second counter 2 is the next Walsh function number, and element 7 is opened by trigger 5. The output of the next Walsh function lasts until counter 1 is completely filled. Through the group of elements And 3 on the Walsh function number from the counter 2 to adder 4 modulo two permits the corresponding Rademacher functions from counter t, and at the output of adder 4 modulo two a Walsh function is formed. This function passes through the open element AND 7 to the output of the function generator; Walsh. After filling the counter 1 by the next clock pulse, the first counter I is reset to the zero state. The impulse of the transfer goes through the AND 6 element to the input of the counter 2 and the control input of the register 8, through the IL AND 11 element to the counting input of the trigger 5, resetting its zero state to B. The reset to the zero state of the trigger 5 closes the element AND 7, thereby organizing a pause, the duration of which is determined by the code received on the control signal from the element AND b to the register 8. After the number of clock pulses received at the input of the counter I after resetting it to the zero state, will become equal to the code located in perrfcTр 8, adder 9 will generate for all bits single signals to the inputs of the multi-input element UY, a single signal from the output,

Yes, which returns the trigger 5 to the initial state and resets the register 8 and the IR count I to the zero state. On this cycle, the regenerative regular Walsh function is completed by HBaeTCH.

Thus, the proposed device, in contrast to the known, allows organizing a pause between successively generated Walsh functions, not fixed, but of arbitrary duration.

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Claims (1)

WALSH FUNCTION GENERATOR containing two counters, a group of AND elements, an adder modulo two, a trigger, a first and a second element AND, where the counting input of the first counter is a clock input to the Walsh function generator, the outputs of the same bits of the first and second counters are connected to the inputs of the corresponding AND elements groups whose outputs are connected to the inputs of the adder modulo two, the output of the trigger is connected to the first inputs of the first and second elements AND, the output of the overflow of the first counter, ka and the output of the adder modulo two are connected to the second inputs of the first and second elements AND, accordingly, the output of the first element And is connected to the input of the second counter, the output of the second element And is the output of the Walsh function generator, characterized in that, in order to improve the operational characteristics of the Walsh function generator, which consists in controlling the pause between successively generated functions, it contains a register, an adder, a third AND element, an OR element, and the information inputs of the register bits are connected to the information inputs of the Walsh function generator, in the course of the first element And is connected to the control input of the entries in the register, the outputs of the bits of the first counter and inverse The outputs of the bits of the register are connected to the first and second groups of inputs of the adder, the outputs of the bits of which are connected to the inputs of the third element And, the output of the third element And is connected to the inputs of the setting to zero the first counter and register and to the first input of the OR element, the second input and output of which are connected respectively to the second input of the first AND element and to the counting input of the trigger: 1068921;