Underwater optical communication polarization code coding method based on channel merging and splitting

Abstract

The invention discloses an underwater optical communication polarization code coding method based on channel merging and splitting. The underwater optical communication polarization code coding methodcomprises the following steps: constructing a linear transformation matrix, merging non-memory channels, splitting vector channels, selecting bit channels, and finishing coding of polarization codes.According to the invention, the method comprises the steps of: performing Kronecker product operation on a basic matrix and bit reverse order rearrangement is carried out on the basic matrix to generate a linear transformation matrix; carrying out linear combination and recursive combination on the memory-free channels through a linear transformation matrix; splitting the combined vector channelinto binary input channel channels according to the channel transition probability; consequently, obtaining a bit channel, calculating a Bhattacharyya parameter value of the bit channel through adoption of a density evolution method and a Monte-Carlo method; according to the Bhattacharyya parameter value, selecting a corresponding channel to send an information bit sequence and a dormant bit sequence, and completing coding of underwater optical communication polarization codes, so that an optical signal is better transmitted underwater during underwater optical communication, and the stabilityof communication performance is ensured.

Description

technical field [0001] The invention relates to the technical field of polar code coding, in particular to a polar code coding method for underwater optical communication based on channel merging and splitting. Background technique [0002] In recent years, due to its unique advantages, underwater optical communication has become one of the cutting-edge technologies with great potential in the field of next-generation high-speed, high-quality wireless communication. Underwater optical communication is a fast wireless optical communication method. In optical communication, due to the great influence of environmental factors, to ensure the reliability and effectiveness of transmission, it is necessary to select a suitable channel code, and polar code is one of the more suitable channel codes. The new channel coding technology that was discovered is the only one proposed by E.Arikan in 2009 that has been theoretically proven to be able to achieve binary input discrete memoryles...

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Problems solved by technology

[0003] Since the polar code was proposed, it has attracted the full interest of many scientific research institutions and industry scholars around the world. It has become a research hotspot in the field of communication and information in recent years. However, with the rapid evolution of wireless optical communication systems, future communication The system will have some new features, and at the same time put forward higher requirements for the coding performance of polar codes for underwater optical communications. Ideally, because the optical signal in underwater optical communication is easily interfered by factors such as underwater turbulence, the energy loss and channel fading of the optical signal will occur during the transmission process, thereby reducing the communication performance of underwater optical communication. The polar code coding method in optical communication is further improved and enhanced. Therefore, the present invention proposes a polar code coding method for underwater optical communication based on channel merging and splitting to solve the problems in the prior art

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