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A three-dimensional orthogonal frequency division multiplexing data modulation method and data demodulation method

A technology of orthogonal frequency division and data modulation, which is applied in the field of three-dimensional orthogonal frequency division multiplexing data modulation method and data demodulation, and can solve the problems of reducing PAPR and the like

Active Publication Date: 2017-11-03
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] The present invention provides a data transmission method and a data receiving method to solve the technical problem that PAPR cannot be reduced at the same time without affecting other performances of the system in the prior art

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  • A three-dimensional orthogonal frequency division multiplexing data modulation method and data demodulation method
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  • A three-dimensional orthogonal frequency division multiplexing data modulation method and data demodulation method

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Embodiment Construction

[0037] The invention provides a data transmission method and a data receiving method to solve the technical problem in the prior art that the PAPR cannot be reduced simultaneously without affecting other performances of the system.

[0038] The technical solution in the embodiment of the present application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0039] Provides a data modulation method different from traditional OFDM systems, including: performing three-dimensional data constellation point mapping on multi-channel bit sequences to obtain OFDM symbols based on three-dimensional mapping; performing three-dimensional Fourier on OFDM symbols Leaf inverse transformation, to obtain the time domain signal of the 3D OFDM system, the time domain signal of the 3D OFDM system is in complex form; decompose the time domain signal of the 3D OFDM system into real part and imaginary part, and pass the 3D carrierless amplitude phase CAP quadrat...

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Abstract

The invention relates to the field of optical fiber communication, and discloses a three-dimensional orthogonal frequency division multiplexing data modulation method and data demodulation method to solve the technology in the prior art that cannot reduce the signal PAPR without affecting other performances of the system question. The specific process of the method is to perform three-dimensional data constellation point mapping on the bit sequence to be transmitted, and obtain an OFDM symbol based on the three-dimensional mapping; the obtained three-dimensional OFDM symbol is subjected to three-dimensional inverse Fourier transform (3D-IDFT) The real part and imaginary part of the complex time-domain signal pass through the three-dimensional CAP orthogonal filter respectively, and finally perform three-way superposition, and combine them into the final transmission time-domain data; through the time-domain signal acquisition of the 3D-CAP-OFDM system The data to be transmitted and the data to be transmitted are sent to achieve the technical effect of effectively reducing the signal PAPR without affecting other performances of the communication system.

Description

technical field [0001] The invention relates to the field of optical fiber communication, in particular to a three-dimensional orthogonal frequency division multiplexing data modulation method and data demodulation method. Background technique [0002] OFDM (orthogonal frequency division multiplexing: Orthogonal Frequency Division Multiplexing) technology is a technology with high spectrum utilization rate, which has great potential value in future high-speed long-distance communication systems, but PAPR (peak-to-average power ratio :Peak to Average Power Ratio) is too high has always been a very serious defect, higher PAPR puts forward very high requirements on the amplifier of the system, the transmission distance of the optical fiber, etc. There are many methods for reducing PAPR, such as transmission systems based on clipping, transmission systems based on partial transmission sequences, transmission systems based on carrier interference, and so on. [0003] However, in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/556H04L27/26
Inventor 邓磊王小龙唐明付松年沈平
Owner HUAZHONG UNIV OF SCI & TECH
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