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Construction method of generalized paired complex complementary code gpcc codebook and its extension method

A construction method and complementary code technology, applied in the field of communications, can solve problems such as complex multiple access interference, and achieve the effects of overcoming multiple access interference, expanding codebook capacity, and realizing controllable interference.

Active Publication Date: 2022-03-04
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, although the internal generalized complementary code has a ZCZ area, which can eliminate multiple access interference to a certain extent, if the interference signal falls outside the ZCZ, it will still introduce complex multiple access interference problems.

Method used

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  • Construction method of generalized paired complex complementary code gpcc codebook and its extension method
  • Construction method of generalized paired complex complementary code gpcc codebook and its extension method
  • Construction method of generalized paired complex complementary code gpcc codebook and its extension method

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Embodiment

[0044] In this embodiment, the GPCC code is composed of multiple pairs of complementary codes, and each complex code is divided into two parts, the same direction branch and the orthogonal branch; the autocorrelation function of any GPCC code, in the same direction branch and The orthogonal branches all exhibit the characteristics of the zero correlation zone, and the length of the zero correlation zone is expressed as W min =M, M is the number of GPCC code subcodes, because the autocorrelation function of the same direction branch and the orthogonal branch is perfectly complementary (y-axis symmetry), therefore, the GPCC code can also realize perfect autocorrelation characteristics; any pair of GPCC The intra-pair cross-correlation function of the code shows the characteristics of zero-correlation zone in both the same-direction branch and the orthogonal branch, and the length of the zero-correlation zone is expressed as W min = M, similarly, because the internal cross-correl...

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Abstract

The invention discloses a generalized pairwise complex complementary code GPCC codebook construction method and its extension method. The construction method includes: step 1.1, setting the first matrix A M is an M-dimensional orthogonal Hadamard matrix; step 1.2, use the vectors [+1, +1] and [+1, ‑1] to expand the orthogonal matrix A respectively M Dimensions, obtain the extended orthogonal matrix and step 1.3, set the second matrix D N It is an N×N orthogonal Hadamard matrix, let N=2M, obtain the matching matrix E according to the second matrix D N ; Step 1.4, according to matrix and E N , to construct a GPCC codebook. The extension method includes extending the GPCC code family. The GPCC code constructed by the construction method of the present invention can realize perfect autocorrelation characteristics, perfect inner correlation characteristics, and perfect cross-correlation; the extension method can expand the codebook capacity and have perfect correlation characteristic.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a generalized pairwise complex complementary code GPCC (Generalized Pairwise Complex Complementary) codebook construction method and an extension method thereof. Background technique [0002] In order to improve the quality of service and meet the exponential growth of terminal requirements for new services and applications in the future, code-domain non-orthogonal multiple access (NOMA) is considered to be the most promising future wireless communication technology. One of the multiple access candidate access schemes, NOMA allows multiple users to share the same resource block transmission, therefore, it can significantly improve the spectrum efficiency and user capacity of the system. However, the poor direct correlation of traditional NOMA signature codes will cause complex multiple access interference at the receiving end. Therefore, designing a large number of signatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/00H04J13/10H04J13/14
CPCH04J13/0055H04J13/10H04J13/0011H04J13/14
Inventor 刘喜庆彭木根王志峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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