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Low-complexity polarization code bit interleaving coding modulation method

A technology of interleaving coding and low complexity, applied in the field of channel coding in wireless communication, can solve the problems of high complexity and difficult construction of polar codes, etc.

Active Publication Date: 2019-07-26
SOUTHEAST UNIV
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Problems solved by technology

However, when the BICM high-order modulation method is used, the channels for transmitting each coded bit are different, which brings difficulties to the construction of polar codes
Although there are some polar code construction methods for BICM, most of these methods are based on Monte Carlo simulation or density evolution, and the complexity is high

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  • Low-complexity polarization code bit interleaving coding modulation method
  • Low-complexity polarization code bit interleaving coding modulation method
  • Low-complexity polarization code bit interleaving coding modulation method

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Embodiment Construction

[0048] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0049] For the convenience of explanation, the commonly used mathematical symbols and their meanings are explained as follows:

[0050] Suppose W is a binary input symmetric memoryless channel, the input symbol set is X={0,1}, the output symbol set is Y, and the transition probability is W(y|x), where x∈X, y∈Y. The Barth-Charles coefficient that defines W is:

[0051]

[0052] Assume is the sequence to be encoded, and the polar code encoding sequence is where G N is the generator matrix of the polar code, and N is the length of the polar code. contains K information bits and N-K frozen bits, where the value of the frozen bits is fixed as bit 0. The pol...

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Abstract

The invention provides a low-complexity polarization code bit interleaving coding modulation method. The method comprises the following steps of: calculating a Bhattacharyya coefficient of each bit layer in a modulation constellation point set; calculating a recursive expression of the Bhattacharyya coefficient in the polarization code; according to the modulation order, solving an optimization problem to obtain an optimal permutation for bit interleaving; performing polar code construction; performing modulation after the construction is completed; and demodulating and decoding the channel receiving signal. According to the method, the recursive expression of the Bhattacharyya coefficient in the polarization code is mainly used for calculation, so that the construction complexity of the polarization code for bit interleaving coding modulation is reduced, and the method is superior to an existing method.

Description

technical field [0001] The invention belongs to the technical field of channel coding in wireless communication, and relates to a polar code bit interleaving coding modulation method. Background technique [0002] Polar code is a new type of channel coding technology. It is the first type of channel coding technology that can be strictly proved to achieve the symmetric capacity of binary symmetric input discrete memoryless channel. It has been identified as the control channel in the fifth generation mobile communication system encoding mechanism. In order to achieve high spectral efficiency, polar codes must be combined with high-order modulation. [0003] Bit-interleaved Coded Modulation (BICM) is an important high-order modulation method. The BICM method first interleaves the binary coded sequence, and then modulates the interleaved binary coded sequence. During demodulation, the BICM method ignores the correlation of each bit in a constellation symbol, and regards each...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04L1/0071H04L1/0057
Inventor 潘志文于永润谈晓思刘楠尤肖虎
Owner SOUTHEAST UNIV
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