Polar code construction method and related equipment in bit interleaved polar coding modulation
A technology of polar coding and bit interleaving, applied in the direction of forward error control, digital transmission system, error prevention, etc., can solve the problems of reduced practicability and increased computational complexity, and achieve reduced complexity and good practical prospects Effect
Active Publication Date: 2021-12-14
BEIJING UNIV OF POSTS & TELECOMM
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[0003] However, in an actual communication system, when using the GA algorithm to construct a polar code in a bit-interleaved polar coding modulation system, it needs to be constructed by SNR, that is, when the SNR changes, it is necessary to recalculate each polar channel reliability, leading to increased computational complexity and reduced practicability
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[0024] In order to make the objects, technical solutions and advantages of the present disclosure, the present disclosure will be described in detail below with reference to the accompanying drawings.
[0025] It should be noted that the technical terms or scientific terms used in one or more embodiments of the present specification may be understood by the people of the present disclosure, unless otherwise defined. The "first", "second", and similar words used in one or more embodiments are not used in any order, quantity, or importance, but only to distinguish between different components. Similar words to "include" or "include", or the like, the element or article that appears in front of the word or the article enumerates the elements or objects that appear later in the word, without excluding other elements or objects. Similar words such as "Connect" or "Connect" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or i...
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One or more embodiments of this specification provide a polar code construction method and related equipment in bit-interleaved polar coding modulation. First, determine the polarization weight spectrum of each polar channel according to the polar code of N code length; Secondly, divide the Hamming weight corresponding to the polarization weight spectrum whose value is not zero to obtain L non-negative integers; then according to 2 m Base modulation, calculate the square Euclidean distance and its average probability corresponding to different Hamming distances between constellation points; then determine the error probability threshold of each polarized channel according to the consistent bound of each polarized channel; finally, for the code When constructing an arbitrary N-code-length polar code with rate K / N, the first K polar channels with the smallest error probability threshold are selected to transmit information bits, and the remaining polar channels are used to transmit frozen bits. The scheme of the present application does not depend on the signal-to-noise ratio in the construction process, effectively reduces the complexity of polar code construction in the bit-interleaved polar coding modulation system, and has a good practical prospect.
Description
technical field [0001] One or more embodiments of this specification relate to the technical field of wireless communication, and in particular to a polar code construction method and related equipment in bit-interleaved polar coding modulation. Background technique [0002] In the Bit Interleaved Polar Coded Modulation (BIPCM) system, the construction of the polar code, that is, the selection of the reliable information bit position greatly affects the performance of the system, and is the key to the polar code coding . The commonly used Gaussian Approximation (GA) algorithm approximates the probability density function of the log-likelihood ratio of the polarized channel with a Gaussian distribution, which can accurately measure the error probability of the polarized channel. precision. [0003] However, in an actual communication system, when using the GA algorithm to construct a polar code in a bit-interleaved polar coding modulation system, it needs to be constructed ...
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IPC IPC(8): H04L1/00
CPCH04L1/0071H04L1/0057
Inventor 牛凯吴泊霖
Owner BEIJING UNIV OF POSTS & TELECOMM