SU1480146A1 - Device for shaping phase-manipulated signals - Google Patents

Abstract

The invention relates to communication technology. The purpose of the invention is to expand the number of generated signals. The device contains counters 1 and 5, shaper 2 manipulating sequences, shaper 3 of control signal, permanent memory (ROM) 4 and band-pass filter 6. Counter 1 selects the row number of the matrix and its outputs are connected to the first group of address inputs of ROM 4. From the transmitted information, shaper 2 generates manipulating sequences that arrive at the second group of address inputs of ROM 4. ROM 4 forms K-bit binary numbers arriving at counter 5. Matrix rows will be period Eski successively be repeated on the outputs of counter 5 and the signal phase shift. Thereafter, the rows of the corresponding matrix will be periodically repeated at the outputs of the counter 5, and the columns of the higher bits of the matrices arranged in accordance with the manipulating sequences will be a phase-shifted signal with square-shaped symbols. Filter 6 extracts from this signal an output sinusoidal phase-shift keyed signal. The goal is achieved by the introduction of counters 1 and 5 and ROM 4. 2 Il.

Description

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The invention relates to the use of technology and can be used in discrete information transfer systems.

The purpose of the invention is to expand the number of generated signals.

Figure 1 shows the block diagram of the device; FIG. 2 illustrates an example of constructing matrixes A for an eight-bit signal.

The device contains the first counter 1, the shaper 2 of the manipulating sequences, the shaper 3 of the control signal, the permanent locking device (ROM) 4, the second counter 5 and the band-pass filter (PF) 6.

The device works as follows.

ROM 4 contains n matrices A, f-Ah, each of which contains n rows and K columns. Each phase of the transmitted signal has its own matrix A. (j is the matrix number). The choice of the corresponding matrix is made by the signal from the imaging unit 2, passing to the second group of address inputs of the ROM 4. With the clock frequency nFH (FM is the carrier frequency of the output signal), the rows of the selected matrix appear at the output of the ROM 4. The matrix row number is selected by the first counter 1, which cyclically counts clock pulses with a frequency of nFH up to its input, and its outputs are connected to the first group of address inputs of the ROM 4.

Rows of matrices are arranged on the order of the number from O to n-1 in the binary system. Matrices A: differ from one another in that the i-row of the matrix A: is the (1 + 1) -th row of the matrix A, j4., The last row of the matrix A. represents the first row of the matrix A (j) An example of matrix A: for an eight-bit signal is presented in FIG. Shaper 2, the first input of which receives the transmitted information, and the first one contains symbolic pulses with FC frequency (F is the frequency of the manipulating sequences, where K is logan. The manipulating sequences change on the leading edge of symbolic pulses. The manipulating serial signals are fed to the second group of address inputs ROM 4.

Information from the outputs of the ROM 4 in the form of K-bit binary numbers is fed to the information inputs of the parallel recording of the counter 5, and the digit numbers recorded in the ROM 4 are received-. em is for the same input bit of counter 5 (in FIG. 2, the least significant bit of the numbers is located on the right), i.e. The lower bit of the number from the output of ROM 4 goes to the lower input bit of counter 5, and so on.

The shaper 3 from the trailing edge of the clock pulse arriving at its input generates a short pulse, with the help of which the number from the output of ROM 4 is recorded in parallel to counter 5, i.e. the number present on the information inputs of counter 5 appears on its parallel outputs.

With the arrival of the next clock

A pulse with a frequency of nFH appears on the clock input of the counter 5 at its information outputs a number representing the next row of the matrix A ;, At the output of the K-th (senior) bit of the counter 5, there will be an n-phase controlled signal. Thus, the rows of the matrix are periodically sequentially repeated at the outputs of counter 5 until the signal phase changes, and then periodically sequentially repeated at the outputs of counter 5, the rows of the corresponding matrix, and the columns of the higher bits of the matrices (Fig. 2) arranged in accordance with the manipulating sequence. are represented by a phase-mapped signal with square-shaped symbols. The FS-6 extracts from this signal a sinusoidal FM signal, which is fed to the output of the device.

Claims (1)

Invention Formula A device for generating phase-manipulated signals, comprising a manipulator of a manipulating sequence, a control signal generator and a band-pass filter, the output of which is an output of the device, characterized in that, in order to expand the number of generated signals, two counters and a permanent storage device are inserted into it, the clock inputs. the inputs of the first and second counters and the first input of the control signal generator are interconnected and are the clock input of the device; the first input of the generator Atel manipulating sequences is a data input device, the second input of the sequences and manipulate control signal shaper are connected to each other and are a character input device, the outputs of the first counter connected to the first group of address inputs of the permanent storage device, the second group of address inputs of which are connected to the outputs of the manipulating sequence generator, the output of the control signal generator and the outputs of the permanent storage device are connected respectively to the control and information inputs of the second counter, the output of which is connected to the input of the band memory filter.