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High-order continuous polarization modulation method of improving spectral efficiency

A technology of high-order continuous polarization and modulation method, which is applied in multi-carrier systems and other directions, and can solve problems such as limited improvement in spectral efficiency and signal waveform jumps

Active Publication Date: 2014-03-26
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

When the polarization state of this modulation changes, the signal waveform will jump, and this jump will generate high-frequency components, which will broaden the spectrum, so that the spectral efficiency is limited.

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  • High-order continuous polarization modulation method of improving spectral efficiency
  • High-order continuous polarization modulation method of improving spectral efficiency
  • High-order continuous polarization modulation method of improving spectral efficiency

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Embodiment Construction

[0049] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0050] The invention proposes a method for improving the spectral efficiency of polar modulation.

[0051] Polar modulation is to use the polarization state of the signal to carry information, which is different from the traditional scalar quantities such as amplitude, phase, and frequency. The polarization state is a vector, which represents a point on the Poincaré sphere, and the trajectory of all points on the Poincaré sphere It can be represented by the polarization vector Z(t), or it can be represented by the two orthogonal components of the Jones vector, that is, the amplitude ratio and phase difference of the two orthogonal components. (γ,φ) represents the phase descriptor, where tanγ represents the amplitude ratio and φ represents the phase difference. In the present invention, under the condition that the phase difference is constant φ, the continuo...

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Abstract

The invention provides a high-order continuous polarization modulation method of improving spectral efficiency. The specific steps are as follows: step one, sending the high-order continuous polarization modulation for original data transmission information and particularly achieving the continuity of polarization states through the continuous variation of amplitude ratio under the condition of constant phase difference; step two, performing the demodulation of high-order continuous polarization signals at the receiving end through the Stokes parameter extraction method. The high-order continuous polarization modulation method generates continuous signal waves through ensuring that the polarization states of signals are always continuous to enable that the main lobe of power spectra of the signals is narrow, the attenuation of the side lobe is fast, and therefore, the spectral efficiency is improved. In addition, the signal to noise ratio needed in the high-order continuous polarization modulation method is lower than that in a discontinuous polarization modulation under the same bit error rate performance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and is a method for improving spectrum efficiency, in particular to a high-order continuous polarization modulation method for improving the spectrum efficiency of polarization modulation. Background technique [0002] Polar modulation (MPOLSK), as a constant envelope modulation technique, has been widely used in optical communication. With the continuous development of communication, polar modulation is attracting more and more attention as a new modulation technique in wireless communication. . Polar modulation uses the polarization state of electromagnetic waves to carry information, and the constellation points are distributed on the Poincaré sphere. Therefore, compared with traditional M-order amplitude, phase, and frequency modulation, the Euclidean distance between M-order polarization modulation constellation points is larger , System reliability is enhanced. However, as ...

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Application Information

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IPC IPC(8): H04L27/36
Inventor 刘芳芳李若萌郭彩丽曾志民冯春燕
Owner BEIJING UNIV OF POSTS & TELECOMM
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