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A Spectrum Transformation Method Based on Discrete Coding of Polarization Rotation Angular Velocity

A polarization rotation and angular velocity technology, applied in the field of communication, can solve the problems of increasing channel bandwidth and shortage of space spectrum resources, and achieve the effects of reducing occupation, improving anti-interference ability, and increasing transmission rate.

Inactive Publication Date: 2017-11-28
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the increasing number of spacecraft and the increasingly tight space spectrum resources, it is impossible to increase the channel bandwidth without limit

Method used

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  • A Spectrum Transformation Method Based on Discrete Coding of Polarization Rotation Angular Velocity
  • A Spectrum Transformation Method Based on Discrete Coding of Polarization Rotation Angular Velocity
  • A Spectrum Transformation Method Based on Discrete Coding of Polarization Rotation Angular Velocity

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0027] The present invention uses the polarization characteristics of electromagnetic signals to transmit information, wherein each symbol information sets a polarization rotation angular velocity function, that is, the polarization angle of the modulated signal is between 0 and 360 degrees according to the set step Angle changes, so that the main energy of the modulated signal is concentrated at the frequency point of the carrier signal, and two linearly polarized antennas are used for reception at the receiving end, and different polarization rotation angular velocities are converted into angular velocity Doppler frequency shifts at the receiving end , so that the energy of the signal is distributed at the frequency point away from the center frequency of the carrier, so the symbol information can be demodulated according to the Doppler fr...

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Abstract

The invention relates to a frequency spectrum conversion method based on polarization rotational angular velocity discretization encoding. According to the method, different polarization rotational angular velocities are adopted to modulate signals, values of the polarization rotational angular velocities are periodic rectangular pulse functions, main energy of the modulated signals carrying symbol information is distributed at set frequency points, the energy of the modulation signals distributed outside the frequency points is extremely low and will not interfere in other communication systems, and therefore occupation of the signals on frequency spectrum resources is reduced. The different polarization rotational angular velocities are converted into angular velocity Doppler frequency shifts at received ends, so that signal energy is distributed at positions of frequency points deviating from a centre carrier frequency, interference signals not having polarization rotational angular velocities are still located at frequency points of the centre carrier frequency, and therefore the interference signals located at the frequency points of the centre carrier frequency and effective signals deviating from the frequency points of the centre carrier frequency can be effectively distinguished through a band-pass filter, and the interference resistance ability of a communication system can be improved.

Description

technical field [0001] The invention relates to the field of communication, in particular to a spectrum transformation method based on discretization coding of polarization rotation angular velocity. Background technique [0002] Under the existing communication system, the original information is expressed using the characteristics of the electromagnetic wave spectrum, and various signal modulation methods are used for information transmission. The modulation techniques that have been used include double-sideband amplitude modulation (AM), suppressed carrier double-sideband amplitude modulation (DSB), single Sideband amplitude modulation (SSB), vestigial sideband amplitude modulation (VSB), frequency modulation (FM), phase modulation (PM), amplitude keying (ASK), frequency keying (FSK), phase keying (PSK, DPSK , QPSK, QAM, MSK), pulse amplitude modulation (PAM), pulse width modulation (PWM), pulse position modulation (PPM), pulse code modulation (PCM) and differential pulse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00
CPCH04B14/008
Inventor 刘海涛
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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