A Method for Optimizing the Code Degree Distribution of Digital Fountains Based on Multiple Access Channels

A technology of digital fountain and optimization method, which is applied in the direction of digital transmission system, transmission monitoring, forward error control, etc., can solve problems such as poor performance of degree distribution function, achieve excellent bit error rate performance, simplify channel model, excellent The effect of bit error correction performance

Active Publication Date: 2020-08-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] The technical problem solved by the present invention is to aim at the deficiency of the above background technology, provide a digital fountain code degree distribution optimization method based on multiple access channels, and provide the equal power multiple access channels and unequal power multiple access channels respectively The degree distribution optimization model solves the problem of poor performance of existing degree distribution functions in multiple access channels

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  • A Method for Optimizing the Code Degree Distribution of Digital Fountains Based on Multiple Access Channels
  • A Method for Optimizing the Code Degree Distribution of Digital Fountains Based on Multiple Access Channels
  • A Method for Optimizing the Code Degree Distribution of Digital Fountains Based on Multiple Access Channels

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[0052] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0053]Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as he...

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Abstract

The invention provides a degree distribution optimization method of a digital fountain code based on a multiple access channel, belonging to the field of digital communication technology. An existing degree distribution optimization algorithm of the digital fountain code is only applicable to single-user channels, but the degree distribution optimized for the single-user channels cannot be well adapted to the multiple access channel. The invention provides the degree distribution optimization method of the digital fountain code based on the multiple access channel on the basis of a traditional linear programming method, and in addition, a degree distribution optimization model is proposed for two cases where the transmitting power of each user is equal and unequal in the multiple access channel, and the optimal bit error rate performance can be provided by using an optimization result.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a code degree distribution optimization method of a digital fountain based on a multiple access channel. Background technique [0002] The traditional code division multiple access (CDMA) system mainly distinguishes different users through mutually orthogonal spreading sequences. Since the actually used spreading codes are difficult to achieve strict orthogonality and strict synchronization, resulting in multiple access interference (MAI ) has seriously affected the acceptance performance and system capacity. Moreover, the spreading code is specially designed, so it cannot meet the demand for explosive growth of the number of users. Recently, non-orthogonal multiple access technology has been extensively studied because of its support for a large number of users. Common non-orthogonal multiple access includes power multiple access, sparse code multiple access, fi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04B17/391
CPCH04B17/391H04L1/0048H04L1/0054H04L1/0071
Inventor 邓大椿徐大专杨东林
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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