Method and device for forming two-dimensional optical orthogonal code with zero correlation window

A technology of optical orthogonal code and zero correlation window, which is applied in the field of optical communication, can solve the problems that the address code cannot be completely orthogonal and the cross-correlation characteristics are not ideal, and achieve the elimination of multiple access interference and beat noise, and the elimination of the near-far effect Effect

Active Publication Date: 2012-10-24
SHENZHEN UNIV
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a two-dimensional light with a zero-correlation window that is completely orthogonal and has ideal cross-correlation characteristic

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  • Method and device for forming two-dimensional optical orthogonal code with zero correlation window
  • Method and device for forming two-dimensional optical orthogonal code with zero correlation window
  • Method and device for forming two-dimensional optical orthogonal code with zero correlation window

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Embodiment Construction

[0047] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0048] In the embodiment of the method and device for forming a two-dimensional optical orthogonal code with a zero-correlation window of the present invention, the block diagram of the method is as follows figure 1 shown in figure 1 , the method includes the following steps:

[0049] Step S001 constructs the first sequence with a zero correlation window: in this step, since the base sequence is to be constructed, and the base sequence must have a zero correlation window, considering that the large area (Large area, abbreviated as LA) sequence is not only a periodic correlation meaning The zero-correlation zone sequence under , the length of its period is equal to the code length of the code word, and it is a zero-correlation zone sequence in...

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Abstract

The invention relates to a method for forming a two-dimensional optical orthogonal code with a zero correlation window, and the method comprises following steps of constructing a first sequence with the zero correlation window; constructing a second sequence; and mapping the first sequence and the second sequence to form the two-dimensional optical orthogonal code with the zero correlation window. The invention also relates to a device for realizing the method. The method and the device for forming the two-dimensional optical orthogonal code with the zero correlation window have following beneficial effects that the two-dimensional orthogonal code is completely orthogonal, i.e. the autocorrelation limit of the code is zero, cross-correlation limit of the code is also zero, and thus the multi-address interference and beat noise can be completely eliminated, the near-far effect of a two-dimensional optical code division multiple access (OCDMA) system also can be eliminated; therefore, the two-dimensional OCDMA system with large capacity can be realized, and the two-dimensional OCDMA system can be applied to an optical access network, an optical local area network, an optical code mark switching network, an optical fiber sensor network and the like.

Description

technical field [0001] The present invention relates to the field of optical communication, more specifically, to a method and device for forming a two-dimensional optical orthogonal code with a zero-correlation window. Background technique [0002] Optical Code Division Multiple Access (OCDMA for short) has the characteristics of broadband, security and random instant access, and is one of the best solutions for future high-speed local area networks and access networks. According to the degree of freedom, it can be divided into one-dimensional OCDMA system and two-dimensional OCDMA system. The address code of the two-dimensional OCDMA system not only expands in the time domain, but also expands in the wavelength, which is called two-dimensional optical orthogonal code. Two-dimensional optical orthogonal codes are generally obtained by expanding wavelength channels on the basis of one-dimensional optical address codes. [0003] At present, many scholars at home and abroad h...

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Application Information

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IPC IPC(8): H04J14/00H04J13/12
Inventor 吉建华王可徐铭张志朋杨淑雯
Owner SHENZHEN UNIV
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