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A method and system for orthogonal frequency division multiplexing based on multi-dimensional signal index modulation

A technology of orthogonal frequency division and index modulation, which is applied in the field of communication, can solve the problems of unsatisfactory requirements, small noise tolerance of two-dimensional signal constellation diagram, low spectral efficiency, energy efficiency and low bit error rate performance, so as to improve energy efficiency. Efficiency, improved bit error rate performance, and the effect of improving bit error rate performance indicators

Active Publication Date: 2021-10-22
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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  • A method and system for orthogonal frequency division multiplexing based on multi-dimensional signal index modulation
  • A method and system for orthogonal frequency division multiplexing based on multi-dimensional signal index modulation
  • A method and system for orthogonal frequency division multiplexing based on multi-dimensional signal index modulation

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[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 multidimensional signal index modulation includes a sending end and a receiving end;

[0065] refer to figure 1 , figure 1 It 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] The ...

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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 the high-dimensional signal constellation diagram, one or two high-dimensional signals are mapped in each OFDM signal subframe by means of in-phase and quadrature modulation, and more transmission bits are implicitly in-phase with sub-carriers in the sub-frame In the activation position information of the orthogonal component, fewer mapping signals in the subframe of the OFDM signal effectively improve the energy efficiency of the system, and more transmission bits are implied in various index information to improve the energy efficiency of the system. Spectrum efficiency, high-dimensional signals can effectively reduce the bit error rate of the system compared with traditional two-dimensional signals, and the high-dimensional signal constellation diagram designed through block codes is more conducive to improving the bit error rate performance indicators through effective decoding methods. The proposed multi-dimensional signal index modulation OFDM method and system has advantages in energy efficiency, spectrum efficiency and bit error rate performance compared with traditional OFDM systems.

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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Patent Type & Authority Patents(China)
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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