We are developing a GPR radar using the SFCW thecnic.
We want to use both channels operating in MIMO mode, connecting TX1 and RX1 to antennas to transmit and receive a signal, and connect TX2 to RX2 directly. The second connection is usefull to discover the phase difference between the emitter and the receiver. Knowing the phase difference between the channels we can calculate the phase difference introduced by reflection caused by the object we want to detect with the radar.
We have tested the MIMO mode and we are getting a significative phase difference between the results in RX1 and RX2.
It was expected a slight phase difference but the difference sometimes reaches almost 90º.
Is there any way to configure both channels to work properly for our needs that we are not seeing?
Another aspect you might consider exploring is the possibility of software-based phase correction techniques. Some software-defined radio (SDR) platforms offer features or plugins for phase alignment and compensation. By analyzing the phase differences between the received signals on RX1 and RX2, you could potentially develop algorithms or utilize existing tools to dynamically adjust the phase of one channel to match the other. This approach could help achieve better synchronization and alignment between the channels, thereby improving the accuracy of your GPR radar system. Additionally, consulting with experts in signal processing or radar engineering may provide further insights and innovative solutions tailored to your specific requirements.
