Encoding and decoding method and device
An encoding method and an encoding technology, which are applied in the field of encoding, decoding methods and devices, can solve the problems of increasing information redundancy damage, increasing bit error rate, reducing information transmission rate due to information redundancy, etc.
Inactive Publication Date: 2020-06-23
BEIJING UNIV OF POSTS & TELECOMM
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[0004] However, in the coherent optical OFDM communication system, with the increase of transmission distance and transmission rate, increasing the redundancy of information is not enough to counteract the damage caused by long transmission distance and high transmission rate, so the bit error rate will still increase significantly. Increase
At the same time, the redundancy of information increased by this encoding method will also significantly reduce the transmission rate of information
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[0077] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0078] In order to reduce the bit error rate without affecting the transmission rate of information, the embodiment of the present invention provides an encoding and decoding method and device.
[0079] The encoding method provided by the embodiment of the present invention can be applied to a coherent optical OFDM communication system.
[0080] see figure 1 , figure 1 It is a schematic flow diagram of an encoding method provided by an embodiment of the pres...
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The embodiment of the invention provides an encoding method and device and a decoding method and device. The method comprises the following steps of: encoding a bit sequence to be encoded; firstly, abit sequence to be coded is converted into a first complex sequence; extracting a real part and an imaginary part of the first complex sequence to generate a first real number sequence; obtaining a second real number sequence for encoding the to-be-encoded sequence by using the first real number sequence as input information of an encoder, generating a second complex number sequence by using the second real number sequence, and generating an OFDM frame by using the training sequence after OFDM encoding processing is performed on the second complex number sequence. Compared with the prior art,the method has the advantages that the encoder obtained by training the encoding-decoding deep neural network is used for encoding the bit sequence to be encoded, so that the bit error rate can be reduced on the basis that the transmission rate of information is not influenced.
Description
technical field [0001] The present invention relates to the technical field of communication, in particular to an encoding and decoding method and device. Background technique [0002] Coherent optical orthogonal frequency division multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology has become a promising modulation technology relying on its high-speed data transmission rate, high spectral efficiency and effective resistance to frequency selective fading, and and received widespread attention. However, OFDM also has inherent defects, such as high peak-to-average power ratio (PAPR, Peak to Average Power Ratio), and high sensitivity to frequency and phase noise. Such defects will cause errors in coherent optical OFDM communication systems. The code rate (BER, Bit Error Ratio) deteriorates. [0003] In view of the above-mentioned deterioration of the bit error rate, the coding method provided by the prior art is mainly the forward error correction code....
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IPC IPC(8): H04L27/26H04L1/00G06N3/08G06N3/04
CPCH04L27/2627H04L1/0009G06N3/08H04L27/2628G06N3/045
Inventor 陈远祥韩颖付佳黄雍涛李凯乐余建国
Owner BEIJING UNIV OF POSTS & TELECOMM