Method for generating channel estimation pilot frequency of high-spectrum-efficiency frequency division multiplexing optical communication system

Abstract

The invention relates to a method for generating a channel estimation pilot frequency of a high-spectrum-efficiency frequency division multiplexing optical communication system. The method comprises the following steps of: constructing a plurality of data matrixes according to basic data of the high-spectrum-efficiency frequency division multiplexing system; the data matrix comprises a frequency domain data vector, a frequency domain pilot frequency vector, a data transformation matrix and a pilot frequency transformation matrix; obtaining a first time domain data signal and a second time domain data signal of any symbol i according to the arrangement position of the data matrix; sequentially arranging the second time domain data signals of the N symbols to form a column vector F22; arranging the first time domain data signals of the N symbols in sequence to form a column vector F11; adding F11 and F12 to obtain an estimated pilot frequency sending data block of the high-spectrum-efficiency frequency division multiplexing system; the plurality of sending data blocks form estimated pilot frequency sending data of the high-spectrum-efficiency frequency division multiplexing system; the method has the advantages of being simple in carrier generation mode, flexible in software modulation and capable of saving transmission data.

Description

technical field [0001] The present invention relates to the field of optical communication, in particular to a method for generating channel estimation pilots of a frequency division multiplexing optical communication system with high spectral efficiency. Background technique [0002] Spectral efficiency in the field of optical communication has always been the focus of researchers. The frequency bandwidth that can be used in optical communication is limited, and the current development direction of interconnection has put forward greater requirements for high-speed optical communication. Increasing the transmission rate within the frequency bandwidth has become an urgent problem to be solved. [0003] In order to improve the optical communication rate under a fixed bandwidth, the SEFFM system can greatly improve the spectral efficiency of the optical communication system by compressing the interval between the carriers. However, the transmitter structure of the existing hig...

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Problems solved by technology

[0003] In order to increase the optical communication rate under a fixed bandwidth, the SEFFM system can greatly improve the spectral efficiency of the optical communication system by compressing the interval between carriers. However, the transmitter structure of the existing high-frequency division multiplexing system cannot The pilot processing method of the OFDM system is used for encapsulation, and the generation structure of the system needs to be specially designed

[0004] In the current method, the signal channel estimation pilot generation method of the SEFFM system mainly adds pilots of several symbols in front of the time-domain data symbol block for processing. The pilots in this scheme cannot represent the data of each symbol. ; Or select several sub-carriers in the frequency division multiplexing signal symbols of its high spectral efficiency as pilots, the pilot information of this scheme contains serious inter-carrier interference

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