A two-dimensional ocdma transmission and reception method and device for electric domain coding and decoding

Abstract

The invention discloses an electrical domain encoding-decoding two-dimensional OCDMA sending and receiving method and device. Different two-dimensional lambda-t address codes are used by each path of user data; two-dimensional encoding is carried out via an electrical domain encoder; each path of electrical signal after being encoded enters a corresponding Ethernet physical layer in parallel for parallel-serial conversion; and each path of serial electrical signal is converted into an optical signal via an electrical-to-optical converter with a corresponding wavelength, is coupled by an optical coupler and enters an optical fiber for transmission; at a receiving end, a wavelength division multiplexer is used for firstly carrying out wavelength division demultiplexing on the received optical signal and carrying out photoelectric conversion via a photoelectric converter; and then, each path of the serial electrical signal after wavelength conversion is sent to an electronic decoder via serial-parallel conversion of the Ethernet physical layer; and each user carries out an AND operation on data of a corresponding storage unit according to the corresponding two-dimensional address code; and thus, a data signal of the target user can be recovered. Compared with the traditional non-coherent OCDMA system, the beat noise can be eliminated better and the multi-access interference is inhibited, the system cost can be effectively reduced, and the system flexibility is improved.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to a two-dimensional OCDMA sending and receiving method and device for electric domain coding and decoding used in an optical access network. Background technique [0002] With the advent of the Internet era and the emergence of various new services, people's demand for access network bandwidth has grown exponentially, and China's optical fiber communication has entered a period of rapid development. The main goal is to achieve massive broadband, ultra-large capacity, ultra-long-distance transmission and intelligent all-optical network. In order to meet people's increasing demand for multimedia services such as high-definition digital TV, medical communication and remote video conferencing, various multiplexing technologies should also be used. And born. [0003] Optical Code Division Multiple Access (OCDMA) technology is the development and extension of E...

AI Technical Summary

Problems solved by technology

[0004] Although the OCDMA system has many advantages such as asynchronous random access, soft capacity, and physical layer safety and reliability, the OCDMA system based on all-optical codec has strong beat noise and multiple access interference problems, and needs to use such as ultra-short optical pulse Only expensive equipment such as lasers and optical threshold devices can be effectively suppressed. In addition, the all-optical codec OCDMA system has relatively high requirements for light sources, and expensive light source equipment is required. The system cost is very high, making it difficult for OCDMA to truly move towards Commercial

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