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
CN110418220AActive Publication Date: 2019-11-05BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIJING UNIV OF POSTS & TELECOMM
Publication Date
2019-11-05

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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.
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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 ...

Claims

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