SU1076892A1 - Walsh function generator - Google Patents

Abstract

GENERATOR WALSH FUNCTIONS containing the master oscillator, shift register, function number register. and a trigger, the output of the master oscillator is connected to the clock input of the shift register, the output of the function number register is connected to the parallel information input of the shift register, the trigger output is the output of the Walsh function generator, characterized in that, for the sake of simplicity, it contains the element NOT and the element And, the output of the master oscillator is connected to the input of the element NOT, the output of the element NOT and the serial output of the shift register through the element AND are connected to the counting input of the trigger. I O /

Description

The invention relates to automation and computing, in particular, to discrete function generators, and can be used in equipment for compressing information in television, multi-channel communication, telemetry for presenting various messages and signals in the Walsh basis.

A Walsh function generator is known that contains a Walsh function number generator, a binary point number generator, a group of elements And a shift register whose output is connected to the trigger input, and inputs to outputs of the And elements whose inputs are connected to the corresponding outputs of the Walsh function number generators and binary numbers points i,

The closest technical solution to the proposed is the Walsh function generator, which contains the generator connected to the clock input of the shift register, the parallel information input of the shift register is connected to the output of the function number register, the serial output of the shift register is connected to the counting trigger input, the output of which is the output of the Walsh function generator,

A disadvantage of the known generators is the complexity due to the large number of bits in the registers used (bits with 2 functions generated).

The purpose of the invention is to simplify the Walsh function generator.

Binary number

The minor function number of the Walsh Walsh function

000 001 010 011 100 101 110

111

The goal is achieved by the fact that the Walsh function generator, which contains the master oscillator, shift register, function number register and trigger, the master oscillator output is connected to the shift register input, the function number register output is connected to the parallel information input of the shift register, the trigger output is the output of the generator of Walsh functions, contains the element NOT and the element AND, the output of the master oscillator is connected to the input of the element NOT, the output of the element is NOT and sequential output of the shift register through the element HT and connected to the counting input of the flip-flop.

FIG. 1 is a functional diagram of the Walsh function generator in FIG. 2, its timing diagrams.

The generator of Walsh functions contains the master generator 1, the element NOT 2, the register 3 of the shift, the register 4 the number of the function, the element 5 of the trigger 6.

The Walsh function generator works as follows.

The binary code of the Walsh function number is supplied from the outputs of the register 4 numbers of the Walsh functions to the corresponding inputs of the register 3 shift. As a result, in the shift register 3, binary numbers are written in accordance with the table.

Number written in shift register

0000000 0001000 0100010 0101010 1010101 1011101 1110111

1111111

Under the influence of the clock frequency coming from the output of the setting generator 1 to the clock input of the shift register 3, the information recorded in it is shifted and fed to one of the inputs of the element 5, to the second input of which 5

inverted clock signal. The voltage at the output of the element And 5 is gated, and for each binary interval of the minimum duration there is one gate, and the duration of each gate is equal to

half of the duration of the clock interval (this circumstance makes it possible to reduce the number of bits of the shift register). The signals from the output of the element And 5 are fed to the counting input of the trigger 6, previously set to one state. The moments of occurrence of logical units at the output of the element And 5 correspond to the moments of change of sign generated by the Walsh function, therefore, at the output of trigger b, it is the Walsh functions that are formed.

-dgitshlG PllshltoO

jbTLJlTLJli

P-

 nffModffii / HHmiu Walsh

FIG. 2 shows diagrams illustrating the process of forming the function Wai (5.0). Diagrams a, b, c, d, d show the time status of the outputs of the master oscillator 1, the HE element 2, the shift register 3, the AND element 5 and the trigger 6 (Wal (5, e), respectively).

In the proposed

Walsh function generator number of ranks DON

shift register equals

2 that

half as much as in the prototype.

Claims (1)

A WALSH FUNCTION GENERATOR containing a master oscillator, a shift register, a function number register and a trigger, the output of the master oscillator being connected to the clock input of the shift register, the output of the function number register connected to the parallel information input of the shift register, the trigger output being the output of the Walsh function generator, different the fact that, for the sake of simplification, it contains the element NOT and the element AND, the output of the master oscillator is connected to the input of the element NOT, the output of the element NOT and the serial output of the register to shift through e element And are connected to the counting input of the trigger. figure 1