Removal of Training Signals in Synchronized Multi-Channel PCL Receiver

In this paper, we present a signal processing method designed to cancel the training signals injected into the Radio Frequency (RF) path for time and phase synchronization purposes before processing in the Passive Coherent Location (PCL) algorithm. This method is based on block processing and correlation calculations in sub-sample resolution. The experimental results with real signals show that it is possible to suppress the training sequences by 27 dB while keeping the useful components unmodified. As a result, we can see an improvement in the signal-to-noise ratio of the PCL range-velocity plot, and the echo of a moving target becomes clearly visible in the modified signal.