A multi-core optical fiber transmission perception method and system based on discrete multi-tone modulation

Abstract

The invention discloses a multi-core optical fiber transmission sensing method based on discrete multi-tone modulation: a crosstalk probe is inserted into the signal at the transmitting end, pre-coding preprocessing is performed on the signal, and discrete multi-tone modulation is performed on the pre-coded signal , and add a cyclic prefix; the modulated signal is loaded onto the optical carrier through the electro-optic modulator, and the optical carrier loaded with the modulated signal is transmitted through the multi-core optical fiber; the received optical information is sampled and frame-synchronized before de-discrete Multi-tone modulation and channel equalization, and deprecoding to obtain the crosstalk probe value, extract the transmitted signal; monitor the system working status in the warm-up state and working state respectively. The invention realizes crosstalk monitoring and signal transmission at the same time, making it possible to monitor the crosstalk phenomenon in the channel when the multi-core optical fiber is used for space division multiplexing signal transmission. The invention also provides a corresponding multi-core optical fiber transmission perception system based on discrete multi-tone modulation.

Description

technical field

[0001] The invention belongs to the field of optical fiber communication systems, and more specifically relates to a multi-core optical fiber transmission sensing method and system based on discrete multi-tone modulation. Background technique

[0002] The optical communication network covers a wide range of application scenarios, covering product lines such as transmission, access, and data communication. Among them, short-distance interconnection scenarios mainly cover data center optical connections and interconnection scenarios below 80km. In recent years, with the popularization of smart terminals and the development of new network services, network traffic has grown explosively, which has brought enormous pressure on the capacity of communication systems. In order to meet the needs of massive data transmission, multiple multiplexing methods have been proposed, among which the easiest way to implement is space division multiplexing, which transmits in pa...

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