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Method and device for determining channel reliability in polarization coding modulation

A polarization encoding and reliability technology, applied in the field of communication, can solve problems such as high computational complexity

Active Publication Date: 2015-11-25
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

In order to ensure the accuracy of the calculation results, the dimension of the vector is set to 10 6 High, the above two convolution operations on such a high-dimensional vector, the computational complexity is very high

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  • Method and device for determining channel reliability in polarization coding modulation
  • Method and device for determining channel reliability in polarization coding modulation
  • Method and device for determining channel reliability in polarization coding modulation

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Embodiment Construction

[0082] 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.

[0083] Such as figure 1 As shown, the embodiment of the present invention provides a method for determining channel reliability in polar coding modulation, which may include:

[0084] S100. Using the demodulator in 2 of the first modulation mode m The receiving end of the channel input by the system demodulates each bit of the received signal, and converts the 2 bits of the first modulation mode m The binary input channel is split into m binary input channel...

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Abstract

Embodiments of the invention provide a method and device for determining channel reliability in polarization coding modulation. The method comprises: dividing a channel into m binary input channels, carrying out channel polarization transformation, and using a Gaussian approximation algorithm to calculate a log likelihood ratio Gaussian distribution mean corresponding to the polarization sub-channels according to the equivalent noise variance of the binary input channels obtained by splitting, so as to determine the reliability of the polarization sub-channels. Since the method provided by the invention adopts the Gaussian approximation algorithm, the problem of calculation complexity caused by calculating the channel reliability by using a density evolution tool is avoided. Compared with the scheme of calculating the channel reliability by using the density evolution tool, the calculation complexity of the method provided by the invention is obviously reduced.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and a device for determining channel reliability in polar coding modulation. Background technique [0002] The channel is an important channel for data transmission, so determining the reliability of the channel is particularly important for channel selection. [0003] In the prior art, the channel reliability is calculated by using the density evolution tool, but two convolution operations are involved in the process of using the density evolution tool to calculate the channel reliability. The probability density function of the log-likelihood ratio is a continuous function, so the convolution operation requires an integral operation. [0004] However, in the actual digital communication system, the integral operation cannot be realized directly, the probability density function must be quantized first, and then the integral operation is transformed into a discr...

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Application Information

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IPC IPC(8): H04L1/00
CPCH03M13/13H03M13/033H04L1/0009H04L1/0056
Inventor 牛凯戴金晟
Owner BEIJING UNIV OF POSTS & TELECOMM
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