PN radar networks with phase noice cancellation

具有相位噪声消除功能的 PN 雷达网络

• 批准号: 436255915
• 负责人: Professor Dr.-Ing. Ahmet Ulusoy
• 金额: --
• 依托单位: Institut für Hochfrequenztechnik und Elektronik (IHE)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/436255915?language=en
• 关键词: PN; radar; networks; phase; noice

PN-Radar Networks with Phase-Noise SuppressionIn the last years, radar sensors have been widely available for various applications and especially for industrial applications and autonomous driving. Among other factors, this is due to the advancements in semiconductor technologies, making fully integrated sensor frontends possible. The large number of sensor elements used in today´s applications create interesting opportunities by means of establishing a network and cooperative operation in order to enable multi-static measurements. For this purpose, a dedicated communication link could be established between the sensors or the sensors could “see” each other in a multi-static network by receiving each other´s radar signals. The latter has the advantage that no additional resource is required for the communication. Such sensor networks that do not require an additional communications link will be investigated in this project. Preliminary studies have shown that it is possible to operate multiple radar sensor in such a way that they are able to see each other, even if the sensors are operated incoherently. Incoherent operation is mainly advantageous due to the reduced hardware complexity. However, the main challenge is the fact that the phase noise of the receivers and the transmitters will not be eliminated in the multi-static operation. In this case, the signal to noise ratio (SNR) of the multi-static radar signals are so much worse than the mono-static case that nothing can be gained by the utilization of all possible radar measurements within the network. A solution is carrier recovery from the transmitted signal on the receiver side, because the recovered carrier will exhibit the same phase noise as the transmit signal, making it possible to cancel the phase noise. In this project, radar networks in the millimeter-wave frequencies around 240 GHz will be investigated that are modulated with Pseudo-Noise (PN) sequences. All sensors will operate incoherently in the hardware level, while only a rough time synchronization will take place. Carrier recovery will be investigated as a method to cancel the phase noise between each sensor and transmitter pairs in such a network. The network consisting of such digital modulated radars at upper millimeter-wave frequencies will be studied in detail in a simulation environment and will be evaluated and verified by demonstrator experiments.

具有相位噪声抑制的伪码雷达网络在过去的几年里，雷达传感器已经广泛应用于各种应用，特别是工业应用和自动驾驶。在其他因素中，这是由于半导体技术的进步，使完全集成的传感器前端成为可能。今天的S应用中使用了大量的传感器元件，通过建立网络和合作操作来实现多静态测量，创造了有趣的机会。为此，可以在传感器之间建立专用的通信链路，或者传感器可以通过接收彼此的S雷达信号在多基地网络中“看到”彼此。后者的优点是通信不需要额外的资源。这类不需要额外通信链路的传感器网络将在本项目中进行研究。初步研究表明，即使多个雷达传感器的工作状态不一致，也有可能以这样的方式工作，使它们能够彼此看到对方。由于降低了硬件复杂性，非相干操作主要是有利的。然而，主要的挑战是，在多基地运行中，接收器和发射器的相位噪声不会被消除。在这种情况下，多基地雷达信号的信噪比(SNR)比单基地雷达信号差得多，利用网内所有可能的雷达测量值是无法获得任何结果的。一种解决方案是在接收端从发射信号中恢复载波，因为恢复的载波将表现出与发射信号相同的相位噪声，从而有可能消除相位噪声。在本项目中，将研究采用伪噪声(PN)序列调制的毫米波频率在240 GHz附近的雷达网络。所有传感器都将在硬件级别不一致地运行，而只会进行粗略的时间同步。载波恢复将作为一种消除这种网络中每个传感器和发射机对之间的相位噪声的方法来研究。将在模拟环境中详细研究由这种数字调制雷达组成的高毫米波频率网络，并将通过演示实验对其进行评估和验证。