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

SHEN Bingsheng; ZHOU Zhengchun; YANG Yang; FAN Pingzhi

doi:10.11999/JEIT240297

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SHEN Bingsheng, ZHOU Zhengchun, YANG Yang, FAN Pingzhi. A Non-interference Multi-Carrier Complementary Coded Division Multiple Access Dual-Functional Radar-Communication Scheme[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240297

Citation:

SHEN Bingsheng, ZHOU Zhengchun, YANG Yang, FAN Pingzhi. A Non-interference Multi-Carrier Complementary Coded Division Multiple Access Dual-Functional Radar-Communication Scheme[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240297

Citation:

SHEN Bingsheng, ZHOU Zhengchun, YANG Yang, FAN Pingzhi. A Non-interference Multi-Carrier Complementary Coded Division Multiple Access Dual-Functional Radar-Communication Scheme[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240297

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

doi: 10.11999/JEIT240297

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)

Received Date: 2024-04-19
Rev Recd Date: 2024-06-26

Available Online: 2024-06-30

Abstract

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

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References(32)

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