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Generalized frequency division multiplexing system and optical fiber signal generation method and device

A generalized frequency division multiplexing and signal technology, applied in the field of optical fiber communication, can solve the problems of large loss of channel transmission performance, low channel capacity, and failure to reach Shannon channel capacity, etc., to achieve optimized constellation diagram distribution, flexible channel coding, and energy reduction The effect of loss

Active Publication Date: 2019-11-05
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The uniform M-QAM constellation causes a large loss of channel transmission performance, and the channel capacity is low, which cannot reach the Shannon channel capacity. Especially in the case of low modulation orders, the channel transmission performance loss tends to be close to The channel capacity is lower, and it cannot reach the Shannon channel capacity

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  • Generalized frequency division multiplexing system and optical fiber signal generation method and device
  • Generalized frequency division multiplexing system and optical fiber signal generation method and device
  • Generalized frequency division multiplexing system and optical fiber signal generation method and device

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Embodiment Construction

[0072] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0073] In order to improve the channel capacity and bit error performance of the GFDM system, the embodiment of the present invention provides a GFDM system. Such as figure 1 The shown GFDM system includes a sending end 101 and a receiving end 102 .

[0074] The transmitting end 101 obtains the original signal sent by the signal source; performs probabilistic shaping processing on the original signal to determine the output sequence; performs hierarchical pro...

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Abstract

The embodiment of the invention provides a generalized frequency division multiplexing system, an optical fiber signal generation method and an optical fiber signal generation device. The method comprises the following steps: acquiring an original signal sent by a signal source; performing probability shaping processing on the original signal, and determining an output sequence; layering the output sequence to obtain a plurality of layered output sequences; carrying out lDPC coding processing on each layered output sequence to obtain an information sequence corresponding to each layered outputsequence; and mapping the information sequence corresponding to each layered output sequence to a constellation diagram according to a preset probability distribution rule to obtain an optical fibersignal of the GFDM system. By applying the technical scheme provided by the embodiment of the invention, the GFDM system optical fiber signal can be obtained through probability forming and a variablecode rate LDPC coding technology, the energy loss of signal transmission is reduced, the coding efficiency is improved, and the error code performance and the channel capacity are improved.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a generalized frequency division multiplexing system, a method and a device for generating optical fiber signals. Background technique [0002] At present, OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology has been widely used in optical fiber transmission systems, and is the main technical means of the fourth generation mobile communication. However, the optical fiber transmission system based on OFDM technology, that is, the OFDM system, has disadvantages such as high out-of-band leakage, high peak-to-average power ratio, and sensitivity to carrier frequency offset. In order to solve the above shortcomings, a GFDM (Generalized Frequency Division Multiplexing, generalized frequency division multiplexing) technology is proposed. [0003] GFDM technology is a non-orthogonal frequency division multiplexing ...

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Application Information

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IPC IPC(8): H04Q11/02
CPCH04Q11/02H04Q11/026
Inventor 忻向军刘博张琦马俊鸿田凤张丽佳田清华王拥军李良川卢彦兆李俊杰王光全杨雷静潘晓龙王曦朔盛夏
Owner BEIJING UNIV OF POSTS & TELECOMM
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