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Phase optimization-based frequency spectrum compression device and method for modulating PAM and Stokes

A spectrum compression and phase optimization technology, applied in the field of image processing, can solve problems such as inability to be directly applicable

Inactive Publication Date: 2016-08-03
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the limitation of DB is that it only changes '1' to '±1', that is, the modulation range is expanded from the original positive direction of I to the positive and negative directions of I, and Q is still not used.
And currently only OOK (that is, PAM2) can use this method to compress bandwidth, and high-order PAM and SPAM modulation cannot be directly applied

Method used

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Embodiment Construction

[0007] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. In addition, the protection scope of the present invention should not be limited only to the following specific modules or specific parameters.

[0008] According to the first aspect of the present invention, a spectrum compression device for implementing PAM and Stokes modulation by using phase optimization is provided, which is applicable to the phase optimization technology of PAM and SPAM to realize spectrum compression. This method pre-establishes the optimal phase table of all possible sequences, and uses the sliding...

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PUM

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Abstract

The invention relates to a spectrum compression device and method for realizing PAM and Stokes modulation by using phase optimization, which is applicable to the phase optimization technology of PAM and SPAM to realize spectrum compression. This method pre-establishes the optimal phase table of all possible sequences, and utilizes the sliding window look-up table averaging method to achieve spectrum compression without performance loss.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a spectrum compression device and method for realizing PAM and Stokes modulation by phase optimization. Background technique [0002] Comparing the single / double sideband PAM, it can be found that both have not achieved simultaneous optimization in terms of spectrum utilization efficiency and optical power efficiency. In fact, adding phase modulation on the basis of PAM can realize spectrum compression without sacrificing power efficiency. For example, DB (Duo-binary) encoding is to halve the signal bandwidth by controlling the phase of '1' on the basis of OOK. However, the limitation of DB is that it only changes '1' to '±1', that is, it expands the modulation range from the original positive direction of I to the positive and negative directions of I, and Q is still not used. Moreover, only OOK (that is, PAM2) can use this method to compress bandwidth at ...

Claims

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Application Information

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IPC IPC(8): H04N21/2383H04N21/438
CPCH04N21/2383H04N21/4382
Inventor 李朝晖
Owner JINAN UNIVERSITY