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Random code length polar encoding method

A technology of polar coding and polar coding, applied in the field of polar coding

Inactive Publication Date: 2015-04-22
BEIJING UNIV OF POSTS & TELECOMM
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The disadvantage of the above-mentioned prior art is: the existing polar coding scheme requires that the code length must be a power of 2
In the actual digital communication system, the requirements for the code length are very flexible, and may not be able to meet the requirements of the power of 2

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Embodiment Construction

[0050] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0051] The polar coding method of arbitrary code length of the present invention is that when constructing polar codes, if the code length is not a power of 2, then use a group of virtual channels with a capacity of zero to fill the number of channels to a power of 2, Then, each channel is interleaved and mapped according to the principle of capacity equalization, and then the obtained channel is polarized transformed, and among the transformed channels, the channel with a larger channel capacity is selected according to the designed code rate to transmit the information bit sequence, The remaining channels are used to transmit a fixed bit sequence known to both the transceiver and receiver.

[0052] see Figure 5 , introduce the following operation steps of the ...

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Abstract

A random code length polar encoding method includes: during construction of a polar code, if the code length is not the power of 2, using a group of virtual channels with the capacity of zero for supplementing the channel number to be the power of 2; performing mixed mapping for each channel according to the capacity equalization principle; and performing polar conversion for the obtained channels, selecting the channels with higher capacity from converted channels according to the designed bitrate for transmitting information bit sequences, and using the rest channels for transmitting a known fixed bit sequence of a receiving end and a transmitting end. The method enables polar encoding to allow the code length to be an optional positive integer and is applicable to multi-carrier and high-order modulation systems, and the added perforating operation enables the encoding bit sequences outputted by an encoder to be optional in length; by means of channel mixed mapping, polar encoding can adapt to different component channels of parallel channels, so that anti-noise performance is good; and flexibility of using polar codes for a practical digital communication system is greatly improved, and accordingly the method has good application prospect.

Description

technical field [0001] The present invention relates to a polar encoding method with arbitrary code length, which is used to solve the problem of transmission data error caused by channel interference to the communication process in a digital communication system; In the digital communication system of error coding, the polarization coding method of arbitrary code length is realized by channel polarization technology at the signal sending end. The invention belongs to the technical field of channel coding of digital communication. Background technique [0002] Polar Codes (Polar Codes) is a constructive channel coding method proposed by E.Arikan in 2009 that has been strictly proven to be able to achieve channel capacity. Before polar coding, N=2 n independent binary input channels (or use the same channel N times successively, that is, N available time slots of a channel), the application figure 1 The shown basic unit of channel polarization repeatedly polarizes binary i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH03M13/13H03M13/635
Inventor 牛凯陈凯
Owner BEIJING UNIV OF POSTS & TELECOMM