High anti-noise P-bit light transmission method based on multi-probability distribution

Abstract

The invention discloses a high anti-noise P-bit light transmission method based on multi-probability distribution. According to the high anti-noise P-bit light transmission method, a subcarrier is divided into signal streams in six modes, the signal streams are multiplexed and then transmitted to one core of a 19-core 6-mode optical fiber through using optical fiber fan-in equipment, and 18 pseudo-random binary signals with the same wavelength are modulated by using different binary sequences in different transmitters of the other 18 cores. The 19 signals are sent out by means of a 19-core 6-mode optical fiber, and are received and processed by a signal receiving device; and the multi-probability code modulation adopts Maxwell-Boltzmann distribution to carry out probability shaping on optical signals for subcarriers in different modes, and the value of a probability shaping scaling factor of a high-order mode is greater than the value of a fundamental mode. The high anti-noise P-bit light transmission method has the technical advantages of being high in transmission efficiency and high in anti-noise capacity.

Description

technical field [0001] The invention relates to the technical field of communication technology, in particular to a high-noise-resistant P-bit optical transmission method based on multiple probability distributions. Background technique [0002] With the rapid growth of Internet services and emerging bandwidth applications, traffic in data center networks, access networks and fiber optic backbone networks has grown exponentially in recent years, and this trend is expected to continue in the foreseeable future. However, previous research has shown that the transmission capacity of single-mode fiber is rapidly approaching its fundamental Shannon limit. In order to break through the capacity limitation of single-core single-mode fiber, researchers have introduced multi-core fiber and few-mode fiber in terms of spatial multiplexing. The ultra-high capacity space division multiplexing (SDM) can make the transmission capacity of the optical transmission system reach P bit level. ...

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Problems solved by technology

[0004] At present, there is no existing technology using probabilistic shaping technology in the P-bit optical transmission system. The traditional single-mode optical fiber T-bit is the limit, and only one channel, the transmission speed is low, but the optical signal quality is good, 19 cores The 6-mode optical fiber has 114 channels for parallel transmission, and the transmission rate is very high and can reach P bits, but the problems brought by the multimode optical fiber are that the high-order mode loss is high, the mode coupling strength is large, and the optical signal quality based on high-order mode transmission is poor. Resulting in insufficient bit error rate performance

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