Turbo overlapping X-domain multiplexing coding and decoding method based on maximum likelihood iteration

A maximum likelihood, coding and decoding technology, applied in the field of wireless communication coding, can solve problems such as difficult to achieve high spectral efficiency coding transmission requirements, overlapping multiplicity and increased decoding complexity, to increase anti-interference ability and performance convergence Fast, low-complexity effects

Inactive Publication Date: 2019-12-10
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] However, in overlapping X-domain multiplexing coding, the spectral efficiency increases linearly with the increase of overlapping multiplicity. If the optimal decoding algorithm such as MLSD or MAP is used for decoding, it will face the problem of overlapping multiplicity and decoding complexity. Exponentially rising troubles, it is difficult to achieve high spectral efficiency coding transmission requirements

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  • Turbo overlapping X-domain multiplexing coding and decoding method based on maximum likelihood iteration
  • Turbo overlapping X-domain multiplexing coding and decoding method based on maximum likelihood iteration
  • Turbo overlapping X-domain multiplexing coding and decoding method based on maximum likelihood iteration

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[0017] In order to enable those skilled in the art to understand and implement the present invention more clearly, the technical solutions of the embodiments of the present invention will be described in detail below in the form of specific embodiments in conjunction with the accompanying drawings.

[0018] refer to figure 1 , shows the Turbo overlapping X domain multiplexing coding model of the present invention, and this model comprises:

[0019] A random interleaver and two OVXDM encoders with the same overlapping multiplicity, the original input signal is s, the interleaver output is u, and the shift interval between symbols is ΔX;

[0020] Turbo overlapping X-domain multiplexing encoded output signal c(x) is output by the upper encoder c 1 (x) and lower encoder output c 2 (x) Two parts are orthogonally superimposed to form;

[0021] The output signals from the two encoders are characterized by I / Q phase quadrature.

[0022] refer to figure 2 , shows a kind of Turbo ...

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Abstract

The invention discloses a Turbo overlapping X-domain multiplexing coding and decoding method based on maximum likelihood iteration, which realizes rapid decoding of Turbo overlapping X-domain multiplexing coding by using maximum likelihood iteration and is applied to high spectral efficiency transmission of overlapping X-domain multiplexing coding. According to the invention, the coding structureof overlapped X-domain multiplexing coding is optimized, and the anti-interference capability of the coding structure is improved; the maximum likelihood process of Turbo overlapping X-domain multiplexing coding is constructed, a brand-new decoding iteration process is adopted, the high spectral efficiency performance of Turbo overlapping X-domain multiplexing coding is achieved, and compared witha traditional decoding method, the method has the advantages of being low in implementation complexity and higher in convergence.

Description

technical field [0001] The invention belongs to the field of wireless communication coding, relates to an overlapping multiplexing coding system, in particular to a fast decoding method for Turbo overlapping X domain multiplexing coding. Background technique [0002] With the continuous development of wireless communication, the explosive growth of mobile data traffic has forced people to explore new methods of wireless communication with high spectral efficiency. Extremely high transmission rates and high spectral efficiency have become the mainstream of current wireless communication system design. In order to achieve high-speed and high-spectrum-efficient transmission, people have made unremitting efforts and explorations. Based on this, Professor Li Daoben established a brand-new overlapping X-domain multiplexing coding transmission theory, which forms a high Novel coding theory for spectral efficiency, no coding residue, and high coding gain. OVXDM theoretical analysi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/29
CPCH03M13/2957
Inventor 王亚峰林鹏
Owner BEIJING UNIV OF POSTS & TELECOMM
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