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Orthogonal frequency division multiplexing method and system based on multi-dimensional signal index modulation

A technology of orthogonal frequency division and index modulation, applied in the field of communication, can solve the problems of small noise tolerance of two-dimensional signal constellation, inability to meet requirements, low spectral efficiency, energy efficiency and bit error rate performance, etc.

Active Publication Date: 2021-03-12
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the spectrum efficiency, energy efficiency and bit error rate performance of traditional and general index-modulated OFDM systems are relatively low, and the noise tolerance of traditional two-dimensional signal constellation diagrams is relatively low. The limit is small and cannot meet the requirements

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Embodiment Construction

[0063] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0064] In a specific embodiment, an OFDM system based on multi-dimensional signal index modulation includes a sending end and a receiving end;

[0065] refer to figure 1 , figure 1It is a block diagram of the transmitting end of an OFDM system based on multi-dimensional signal index modulation in a specific embodiment, including serial-to-parallel conversion and bit grouping modules, a dimension index selector module, an in-phase index selector module, and an orthogonal index selector module, Multi-dimensional signal mapper module, frequency-domain OFDM signal generator module, N-point IDFT module, parallel-to-serial conversion, cyclic prefix addition, digital-to-analog conversion and up-conversion module.

[0066] Th...

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Abstract

The invention discloses an orthogonal frequency division multiplexing method and system based on multi-dimensional signal index modulation. Through the design of a high-dimensional signal constellation diagram, one or two high-dimensional signals are mapped in each orthogonal frequency division multiplexing signal sub-frame in an in-phase quadrature modulation mode, and more sending bits are implied in activation position information of in-phase quadrature components of sub-frame sub-carriers. Fewer mapping signals in the orthogonal frequency division multiplexing signal subframes effectivelyimprove the energy efficiency of the system, more sending bits are implied in various index information, the spectral efficiency of the system is improved, and compared with traditional two-dimensional signals, high-dimensional signals can effectively reduce the bit error rate of the system. And the high-dimensional signal constellation diagram designed through the block code is more beneficial toimproving the bit error rate performance index through an effective decoding method. Compared with a conventional orthogonal frequency division multiplexing system, the multi-dimensional signal indexmodulation orthogonal frequency division multiplexing method and the multi-dimensional signal index modulation orthogonal frequency division multiplexing system have the advantages in the aspects ofenergy efficiency, spectral efficiency and bit error rate performance.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an Orthogonal Frequency Division Multiplexing (OFDM) method and system based on multi-dimensional signal index modulation, including high-dimensional signal constellation diagram design, index modulation and OFDM technology, etc. . Background technique [0002] In the field of communication, especially mobile communication, OFDM technology has been widely researched and applied, especially in the fourth generation (4G) and fifth generation (5G) mobile communication, because of its spectrum efficiency High, effective anti-multipath and frequency selective fading and other advantages. However, the spectral efficiency, energy efficiency and bit error rate performance of the traditional and general index modulation OFDM systems are relatively low, and the noise margin of the traditional two-dimensional signal constellation diagram is small, which cannot meet the requi...

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Application Information

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IPC IPC(8): H04L27/34H04L27/36
CPCH04L27/3472H04L27/3483H04L27/362
Inventor 陈振兴陆奕黄田野王勇程卓
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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