一種無擾的多載波互補碼分多址通信雷達一體化方案

沈炳聲; 周正春; 楊洋; 范平志

doi:10.11999/JEIT240297

一種無擾的多載波互補碼分多址通信雷達一體化方案

doi: 10.11999/JEIT240297

1.
西南交通大學信息科學與技術(shù)學院成都 611756
2.
西南交通大學數(shù)學學院成都 611756

基金項目: 國家自然科學基金 (U23A20274, 62171389)，四川省自然科學基金創(chuàng)新研究群體 (2024NSFTD0015)，中央高校基本科研業(yè)務(wù)費 (2682024CX027)

詳細信息

作者簡介:
沈炳聲：男，博士，研究方向為序列編碼設(shè)計、通信雷達一體化

周正春：男，教授，研究方向為編碼理論、通信/雷達波形設(shè)計、電子信息對抗、人工智能

楊洋：男，教授，研究方向為序列編碼設(shè)計、通信/雷達波形設(shè)計

范平志：男，教授，研究方向為為高移動性寬帶無線通信、信號設(shè)計與處理、信息理論與編碼、無線頻譜資源管理

通訊作者:
沈炳聲　bsshen9527@swjtu.edu.cn

中圖分類號: TN958
計量
- 文章訪問數(shù): 224
- HTML全文瀏覽量: 113
- PDF下載量: 55
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2024-04-19
- 修回日期: 2024-06-26
- 網(wǎng)絡(luò)出版日期: 2024-06-30
- 刊出日期: 2025-01-31

A Non-interference Multi-Carrier Complementary Coded Division Multiple Access Dual-Functional Radar-Communication Scheme

1.
School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, China
2.
School of Mathematics, Southwest Jiaotong University, Chengdu 611756, China

Funds: The National Natural Science Foundation of China (U23A20274, 62171389), Sichuan Natural Science Foundation Innovation Research Group (2024NSFTD0015), The Fundamental Research Funds for the Central Universities (2682024CX027)

摘要

摘要: 隨著新興應(yīng)用的不斷涌現(xiàn)，頻譜擁堵問題日益嚴重。通信雷達一體化(DFRC)是解決頻譜擁堵問題的關(guān)鍵技術(shù)之一。然而，如何解決通信與雷達之間的相互干擾并實現(xiàn)高通信速率是通信雷達一體化亟待解決的基礎(chǔ)難題。該文以多載波互補碼分多址技術(shù)為基礎(chǔ)，設(shè)計一種適用于多用戶場景的新型通信雷達一體化信號。理論分析和仿真結(jié)果表明，與典型的擴頻方案相比，所提方案可以實現(xiàn)通信雷達的無擾傳輸，并具有低的誤碼率與高的通信速率。
- 通信雷達一體化 /
- 多載波碼分多址 /
- 互補碼
Abstract: Objective As the digital landscape evolves, the rise of innovative applications has led to unprecedented levels of spectrum congestion. This congestion poses significant challenges for the seamless operation and expansion of wireless networks. Among the various solutions being explored, Dual-Functional Radar-Communication (DFRC) emerges as a key technology. It offers a promising pathway to alleviate the growing spectrum crunch. DFRC systems are designed to harmonize radar sensing and communication within the same spectral resources, maximizing efficiency and minimizing waste. However, implementing DFRC systems presents significant challenges, particularly in mitigating mutual interference between communication and radar functions. If this interference is not addressed, it can severely degrade the performance of both systems, undermining the dual-purpose design of DFRC. Additionally, achieving high communication rates under these constraints adds complexity that must be carefully managed. Therefore, tackling interference mitigation while ensuring robust and high-speed communication capabilities is a fundamental challenge the research community must address urgently within DFRC systems. Successfully resolving these issues will pave the way for widespread DFRC adoption and drive advancements across various fields, from autonomous driving to smart cities, fundamentally transforming our interactions with the world. Methods Multi-carrier Complementary-Coded Division Multiple Access (MC-CDMA) is a sophisticated spread spectrum communication technology that utilizes the unique properties of complementary codes to enhance system performance. A key advantage of MC-CDMA is the ideal correlation characteristics of these codes. Theoretically, they can eliminate interference between communication users and radar systems. However, this requires a data block length of 1. Since a guard interval must be added after the data block, a length of 1 results in many guard intervals during transmission, lowering the communication user’s transmission rate. To address this issue, this paper expands the spread spectrum codes used by both communication users and radars. The communication code is expanded by repetition, while the radar code is extended using Kronecker products and Golay complementary pairs, matching the data block length. This approach ensures that even if the data block length exceeds 1, the radar signal remains unaffected by the communication users. Results and Discussions The proposed scheme effectively addresses interference between radar and communication, while also improving the data rate for communication users. Experimental simulation results demonstrate that the proposed scheme performs well in terms of bit error rate, anti-Doppler frequency shift capability, and target detection. Conclusions Waveform design is crucial in DFRC systems. This paper presents a new DFRC waveform based on MC-CDMA technology. The scheme generates an integrated waveform through code division, enhancing user data rates and preventing random communication data from interfering with the radar waveform. To achieve this, the communication and radar codes are both extended. The communication code uses repetition for extension, while the radar code employs Golay complementary pairs. Theoretical analysis and simulation results suggest that, compared to traditional spread spectrum schemes, the proposed approach allows for interference-free transmission for both communication and radar, achieves a low bit error rate, and provides excellent data rates. On the radar side, the proposed waveform exhibits a low peak sidelobe ratio and excellent Doppler tolerance, allowing for accurate target detection. Additionally, the approach facilitates rapid generation and strong online design capabilities through the direct design of complementary codes.
- Dual-Functional Radar and Communication (DFRC) /
- Multi-carrier code division multiple access /
- Complementary code

HTML全文

圖 1 完備互補碼的非周期相關(guān)函數(shù)

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圖 2 通信雷達一體化系統(tǒng)模型示意圖

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圖 3 發(fā)射端框圖

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圖 4 通信接收端框圖

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圖 5 不同擴頻碼的誤碼率性能

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圖 6 單用戶通信速率

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圖 7 相關(guān)函數(shù)分析

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圖 8 速度-峰值旁瓣比

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圖 9 匹配濾波器輸出

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圖 10 目標距離-速度檢測

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