The root of this problem is mainly the importance of the 5G standard.
Channel coding is one of the important components of 5G communication standards, which has a great influence on chip complexity, terminal cost, power consumption and patent fees. Moreover, mastering the dominance of the 5G standard is also of great significance to the development of related industries.
Polarization code is a kind of polarization code. Arikan first put forward the concept of channel polarization at the ISIT International Conference on Information Theory in 2008. Based on this theory, he gave the first known channel coding method which can be strictly proved to reach the channel capacity, and named it Polar code.
Polar code has a clear and simple encoding and decoding algorithm. Many companies including Huawei are based on this, and this patent will determine a series of problems after the implementation of the subsequent 5G standard.
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This Polar code has become the eMBB scene coding scheme of 5G control channel, which is the embodiment of China manufacturers' technical strength and national comprehensive strength. The polarization code promoted in China proves theoretically that the polarization code can "reach" Shannon capacity under the symmetric discrete memoryless channel with binary input, and the coding and decoding complexity is low. Specifically, polar encoding has three advantages:
First of all, Polar code has higher gain than Turbo.
Secondly, the reliability of Polar code is higher than that of Turbo, and it can reach 99.999% reliability in the application of 5G ultra-high reliability services.
Thirdly, the decoding complexity of Polar code is low, and the power consumption can be reduced by more than 20 times compared with Turbo under the same responsibility.
In addition, the main advantage of China-oriented polar code lies not only in its strong error correction ability, but also in the fact that it is the only known channel coding method in the world that can strictly prove that it can reach the channel capacity, which is of great significance to the standardized management of high-bandwidth networks and has great potential, and patent barriers are also applicable (it is difficult for a technology with too high patent barriers to become the standard in the current communication field).
It is precisely because of these advantages that Polar Code was born less than 10 years ago. However, through the continuous efforts of channel coding scholars, the error correction performance of current Polar codes exceeds that of Turbo codes (French standard) and LDPC codes (American standard) which are widely used at present.
Baidu Encyclopedia-Polar Code