强干扰环境下无速率随机码编译码方案及其性能分析

王义文; 王千帆; 马啸

doi:10.11999/JEIT230879

强干扰环境下无速率随机码编译码方案及其性能分析

doi: 10.11999/JEIT230879

1.
中山大学计算机学院广州 510006
2.
中山大学广东省信息安全重点实验室广州 510006

基金项目: 国家重点研发计划(2021YFA1000500)，国家自然科学基金(62301617)，广东省自然科学基金面上项目(2023A1515011056)

详细信息

作者简介:
王义文：男，博士生，研究方向为信道编码及其在无线通信中的应用

王千帆：男，博士后，研究方向为信道编码及其在无线通信中的应用、无线电通信技术等

马啸：男，教授，博士生导师，主要研究方向为信息与编码理论、编码调制技术、无线通信、光通信等

通讯作者:
马啸　maxiao@mail.sysu.edu.cn

中图分类号: TN92
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- 被引次数: 0
出版历程
- 收稿日期: 2023-08-10
- 修回日期: 2024-06-12
- 网络出版日期: 2024-09-05
- 刊出日期: 2024-10-30

Rateless Random Coding Scheme and Performance Analysis in Strong Interference Environments

1.
School of Computer Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
2.
Guangdong Key Laboratory of Information Security Technology, Sun Yat-sen University, Guangzhou 510006, China

Funds: The National Key Research and Development Program of China (2021YFA1000500), The National Natural Science Foundation of China (62301617), Guangdong Basic and Applied Basic Research Foundation (2023A1515011056)

摘要

摘要: 面向强干扰通信环境，区别于传统的无速率Luby变换(LT)码，该文提出一种基于伯努利随机构造的无速率编码方案，并在接收端采用高效的局部约束顺序统计量译码(LC-OSD)算法进行译码，从而有效对抗强干扰噪声，实现自适应超高可靠传输。为降低收发端通信资源消耗，提出了3个有效译码准则：(1) 基于随机码并集(RCU)界提出的启动准则，当接收符号数大于由RCU得到的阈值时才启动译码；(2) 基于软重量提出的早停准则，在译码过程中软重量超过一个预设的阈值则提前终止译码；(3) 基于码字与硬判决序列比较提出的跳过准则，当新接收序列的硬判决满足重编码校验时跳过当前译码。仿真结果显示，在块删除与加性噪声混合信道下，无速率随机码的性能显著优于LT码，且因无速率码具备自适应信道质量的能力，其性能同样显著优于固定速率码。仿真结果还显示了提出的启动、早停和跳过准则能够有效降低收发端的传输资源消耗和计算复杂度。
- 顺序统计量译码 /
- 随机码 /
- 无速率码 /
- 强干扰信道
Abstract: A rateless coding scheme based on Bernoulli random construction is proposed for strong interference communication environments, which differs from the traditional Luby Transform (LT) rateless codes. The scheme utilizes the Locally Constrained Ordered Statistic Decoding (LC-OSD) algorithm at the receiver to effectively combat strong interference noise and achieve adaptive and ultra-reliable transmission. To reduce the communication resource consumption at both the transmitter and receiver, three effective decoding criteria are proposed: (1) a startup criterion based on the Random Code Union (RCU) bound, which initiates decoding only when the number of received symbols exceeds a threshold derived from RCU; (2) an early stopping criterion based on soft weights, which stops decoding early when the soft weights exceed a preset threshold; and (3) a skipping criterion based on the comparison between the codeword and the hard decision sequence, which skips the current decoding process when the hard decision of the newly received sequence satisfies the recoding check. Simulation results show that the performance of the rateless random codes is significantly better than that of LT codes in a channel with block erasures and additive noise. Moreover, due to the adaptive to channel quality capability of rateless codes, their performance is also significantly better than fixed-rate codes. The simulation results also show that the proposed startup, early stopping, and skipping criteria effectively reduce transmission resources and computational complexity for both the sender and receiver.
- Ordered statistic decoding /
- Random code /
- Rateless code /
- Strong interference channel

HTML全文

图 1 信道传输示意图

下载: 全尺寸图片幻灯片

图 2 不同信噪比下不同码长的RCU性能

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图 3 无速率随机码与LT码性能比较

下载: 全尺寸图片幻灯片

图 4 相同误帧率下无速率随机码与LT码开销比较

下载: 全尺寸图片幻灯片

图 5 固定速率码与无速率码性能比较

下载: 全尺寸图片幻灯片

图 6 启动准则性能

下载: 全尺寸图片幻灯片

图 7 早停准则性能

下载: 全尺寸图片幻灯片

图 8 跳过准则接收端测试次数比较

下载: 全尺寸图片幻灯片

表 1 随机码并集限与实际仿真所需接收符号数对比

信噪比(dB) ${L_{{\text{RCU}}}}$ 实际仿真

1.0 150 151

1.5 135 137

2.0 128 126

2.5 120 118

3.0 110 110

下载: 导出CSV

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