Inseparable Waveform Synthesis in Joint Communications and Radar via Spatial-Frequency Spectrum
Inseparable Waveform Synthesis in Joint Communications and Radar via Spatial-Frequency Spectrum
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DOI：
10.1109/globecom46510.2021.9685675
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发表时间：
2021-12
期刊：
影响因子：
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通讯作者：
Husheng Li
中科院分区：
文献类型：
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作者：
Husheng Li
联合通信和雷达（JCR）在两种功能中使用相同的波形，提供了一种有效的频谱接入方案，并在自动驾驶等实践中找到了各种应用。正交频分复用和多进多出（OFDM-MIMO）结构是一种方便的信令框架，它与高维傅里叶变换产生的空间频谱相对应。当通信和雷达传感共用一个不可分割的波形时，如何解决它们之间的利益冲突是JCR的关键挑战。在模拟波束形成和数字波束形成的情况下，相应的权衡被表述为约束优化问题。数值计算结果表明，所提出的方案在空间频谱管理方面是有效的，并且在通信和雷达感知之间实现了良好的性能权衡。
Joint communications and radar (JCR), which use the same waveform for both functions, provide an efficient scheme of spectrum access and find various applications in practice such as autonomous driving. A convenient signaling framework is the orthogonal frequency-division multiplexing and multi-in-multi-out (OFDM-MIMO) structure, which corresponds to the spatial-frequency spectrum resulted from high-dimensional Fourier transform. The key challenge of JCR is how to resolve the interest conflict between communications and radar sensing, when they share the same waveform in an inseparable manner. The corresponding trade-off is formulated as constrained optimization problems for the cases of analog and digital beamformings. Numerical results show that the proposed schemes are effective in the spatial-frequency spectrum management and achieve good performance trade-offs between communications and radar sensing.