SU1538170A1 - Base function generator - Google Patents

Abstract

The invention relates to automation and computing and can be used in information transmission systems for analyzing and synthesizing signals when they are decomposed into systems of actual basic functions that take two values. The purpose of the invention is to expand the functionality of the generator by generating 2 ^{N / 2} (N-2 ^N is the number of function reports per period) of the basis function systems. The generator contains counters 2.6, registers 3.5 shifts of the size N / 2, N / 4, ..., 1, respectively, N elements NOT 7, N elements And 8, modulo two 9. Entering the shift registers into the composition The generator allows programming its operation to generate N / 2 systems of basic functions. 1 il.

Description

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WITH

The invention relates to the field of automation and computer technology and can be used in the analysis and synthesis of signals in information transmission systems.

The aim of the invention is to expand the functionality of the generator by generating (N 2P - the number of function samples per period) systems of basis functions.

The drawing shows a functional diagram of the generator for the N 8.

The generator contains a clock input 1, counter 2, shift registers 3-5, counter 6, elements NOT 7, elements AND 8, modulo two 9, inputs 30 and AND numbers of the system of functions and function numbers in the system, functional outputs 12 and 13 function numbers in the system. The bit width of counters 2 and 6 is equal to p. Shift register 5 has one bit of shift register 4 - two bits, shift register 3 - four bits, and so on.

The generator implements the method of forming the basis functions through the product of the n generator functions (in the case of the formation of the systems of USPSA functions - through the product of the Rademacher n-functions) in accordance with the expression

SP

with

00

one

Where

"Mfl

j 0,1, ..., N-1,

where d, (j) is the value of the 1st bit

in binary representation

315

index j of the generated function f; i 1,2, ..., n;

K is the index of the generating function K 2 °, P - 0.1, ..., n-1.

Counter 2 counts the clock pulses (TI) arriving at its input and thus forms the period T N TI, which determines the duration of the generated FJ functionless functions. At the beginning of each period (according to the overflow signal of counter 2), a survey is performed with the information inputs A (, ..., A4, which is recorded in shift registers 4-6) (in accordance with the information input connection scheme). in registers 3-5 (controlled by inputs C), the generator functions F,, FQ. and PD, respectively, are formed at the outputs of their last bits.

Through elements NOT 7, the generator functions T, F, and Fq are fed to the first inputs of elements AND 8, where they are performed by raising to a power of 0 or 1 depending on the value of the corresponding signals arriving at the second inputs of elements 2I-HE from the counter 6, the state of which determines the index of the generated basic function.

From the outputs of the elements And 8 values of the functions F | , FЈ and Ґц are fed to the modulo two 9 adder, which is used to generate the output signal corresponding to the value of the generated function F: at the generator output J 2.

Claims (1)

Invention Formula A generator of basic functions containing two n-bit counters, , JQ J5 20 25 so 35 40 704 (2rt is the number of samples of the function per period), n elements And, modulo two adder, the counting input of the first counter connected to the clock input of the generator, the overflow output of the first counter connected to the counting input of the second counter, the bit outputs of the second counter the outputs of the function number and are connected to the first inputs of the respective elements and, the outputs of the elements AND are connected to the inputs of the modulo two adder, the output of the modulo two adder is a functional output of the generator, characterized in that The expansion of the functional capabilities of the generator by generating 2N 2 (N 2rt is the number of function samples per period) of the basis function systems, it contains n shift registers and n elements, NOT, and the 1st information j input j shift register (il , ...,, j "l, ..., n) is connected to f (il) 2 + l-th bit input of the number of the generator function system, and bit output of the j-ro shift register via the j-th element NOT connected to the serial information input of the j-ro shift register and to the second input of the j-ro element, the shift synchronization inputs of all the register the shift is connected to the clock input of the generator, the overflow output of the first counter is connected to the control inputs for recording information of all the shift registers, the bit information inputs of the second counter are the discharge inputs of the number of the generator function, the control input for recording the information of the second counter is controlling the input number of the generator function.