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2025
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| Citation: | HE Zhuoyuan, CHEN Shengyao, ZHU Han, et al. Transmit waveform design for symbol-level precoding-based one-bit dual-functional radar-communication[J]. Journal of Radars, in press. doi: 10.12000/JR24217
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Transmit Waveform Design for Symbol-level Precoding-based One-bit Dual-functional Radar-communication
DOI: 10.12000/JR24217 CSTR: 32380.14.JR24217
More Information-
Abstract
This study explores the use of one-bit Digital-to-Analog Converters (DAC) to mitigate the challenges of high hardware costs and excessive power consumption in large-scale Multiple-Input Multiple-Output (MIMO) communication and radar systems. The present study focuses on the design of one-bit transmit waveforms for dual-functional radar and communication systems. Under preset communication Quality of Service (QoS) constraints, the objective was to minimize the integral sidelobe-to-mainlobe ratio of the radar transmit beampattern. This should help enhance the power concentration of the transmitted beampattern and improve the performance of the beampattern synthesis. To address the limited Degrees of Freedom (DoF) caused by one-bit quantization, this study employs symbol-level precoding technology and then fully utilizes the DoFs in spatial and temporal domains to assist waveform design based on the principle of Constructive Interference (CI). To address the nonconvex fractional quadratic objective function and the multiple nonconvex discrete constraints inherent in the proposed waveform design problem, this study introduces an algorithm that combines the Dinkelbach transform with the Alternating Direction Method of Multipliers (ADMM). This approach effectively tackles the NP-hard problem. The numerical results demonstrate that the designed waveform significantly reduces the required DAC resolution and achieves excellent radar beampattern performance while satisfying the QoS requirements of downlink multiuser communications. -
References
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HE Zhuoyuan, CHEN Shengyao, ZHU Han, et al. Transmit waveform design for symbol-level precoding-based one-bit dual-functional radar-communication[J]. Journal of Radars, in press. doi: 10.12000/JR24217
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- Figure 1. Illustration of Dual-Functional Radar-Communication (DFRC) system
- Figure 2. The feasible set of the transmit waveform entries
- Figure 3. The constructive region for a QPSK symbol
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Figure 4. The variations of objective function value and Dinkelbach auxiliary variable
$ \xi $ - Figure 5. Comparison of the phase diagram of waveform sequence in different transmit waveform design
- Figure 6. Comparison of the radar transmit beampattern in different transmit waveform design
- Figure 7. The influence of different antennas number N on the performance of the transmit beampattern
- Figure 8. Average symbol error rate versus communication requirements
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Figure 9. Radar performance versus communication requirements (solid lines represents the
$ K = 2 $ $ K = 3 $