| 引用本文: | 代 洲,张全玲,凌 琴,等.面向电力线通信融合双模态索引和时间分集的差分混沌移位方案[J].电力系统保护与控制,2025,53(15):135-145.[点击复制] |
| DAI Zhou,ZHANG Quanling,LING Qin,et al.Dual mode index and time diversity based DCSK for power line communications[J].Power System Protection and Control,2025,53(15):135-145[点击复制] |
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| 摘要: |
| 提出一种融合双模态索引和时间分集的差分混沌移位键控(dual mode index and time diversity based differential chaos shift keying, DM-TD-DCSK)方案。该方案利用索引比特将除参考载波外的所有子载波分成先调制载波和后调制载波，并传输两类调制比特序列。同时该方案采用时间分集将先、后激活载波传送的混沌信号在不同时刻多次传送，在接收端对多个信息组求平均，以对抗信道中的噪声。推导了该方案在电力线信道下的理论误比特率公式并通过蒙特卡洛仿真进行验证。理论分析和仿真结果表明，通过引入时间分集和双模态索引调制，相较于单模态索引调制，DM-TD-DCSK不仅具有较高的频谱效率和能量效率，而且在电力线信道下具有良好的抗噪声性能。然而，由于两种技术的引入，DM-TD-DCSK收发机的复杂度增大，即DM-TD-DCSK通过牺牲复杂度换得性能的提升。 |
| 关键词: 电力线通信 差分混沌键控 非相干 索引调制 时间分集 脉冲噪声 |
| DOI：10.19783/j.cnki.pspc.250183 |
| 投稿时间：2025-02-24修订日期：2025-05-30 |
| 基金项目:国家自然科学基金项目资助(62361012)；贵州省高等学校创新团队项目资助(黔教技[2023]064号)；贵州省国际科技合作基地后补助项目资助(GHJD[2025]007) |
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| Dual mode index and time diversity based DCSK for power line communications |
| DAI Zhou1,ZHANG Quanling2,LING Qin2,CHEN Fang3,TANG Wuqin4,CHENG Guixian2 |
| (1. School of Management Science and Engineering, Guizhou University of Finance and Economics, Guiyang 550025, China;
2. School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550025, China; 3. Huizhou Power
Supply Bureau of Guangdong Power Grid Co., Ltd., Huizhou 516003, China; 4. School of Electrical Engineering,
Guizhou University, Guiyang 550025, China) |
| Abstract: |
| A dual mode index and time diversity based differential chaos shift keying (DM-TD-DCSK) scheme is proposed. In this scheme, all carriers excepting the reference carrier are divided into two classes by the index bits, and then the first active carriers are utilized to transmit the first modulated bits and the second active carriers are utilized to transmit the second modulated active bits. Time diversity is also employed to deal with the noise of the power line channel, where the transmitted signals are sent in different intervals and averaged at the receiver. The bit error rate expression is derived over the power line channel and validated through Monte Carlo simulations. Both theoretical analysis and simulated results demonstrate the superiority of the proposed scheme. Combining with diversity and index modulation, DM-TD-DCSK not only enhances the spectral efficiency and energy efficiency of the system compared to the traditional index modulation in which active carriers transmit modulation bits while inactive carriers transmit no information, but also effectively mitigates the impact of impulse noise over power line channels. However, the complexity of the transceivers increases due to employing the two technologies, and thus, the DM-TD-DCSK scheme improves system performance at the cost of higher system complexity. |
| Key words: power line communications DCSK non-coherent index modulation time diversity impulsive noise |
