We present a cognitive prototype that demonstrates a colocated, frequency-division-multiplexed, multiple-input multiple-output (MIMO) radar, which implements both temporal and spatial sub-Nyquist sampling. The signal is sampled and recovered via the Xampling framework. Cognition is due to the fact that the transmitter adapts its signal spectrum by emitting only those subbands that the receiver samples and processes. Real-time experiments demonstrate sub-Nyquist MIMO recovery of target scenes with 87.5% spatio-temporal bandwidth reduction and signal-to-noise-ratio of $-$10 dB.

中文翻译：

---

认知亚奈奎斯特 MIMO 雷达原型

我们提出了一个认知原型，该原型演示了一个协同定位、频分复用、多输入多输出 (MIMO) 雷达，它实现了时间和空间亚奈奎斯特采样。通过 Xampling 框架对信号进行采样和恢复。认知是由于发射机通过仅发射接收机采样和处理的那些子带来调整其信号频谱的事实。实时实验证明目标场景的亚奈奎斯特 MIMO 恢复具有 87.5% 的时空带宽减少和信噪比$-$10 分贝。