Nonlinear polarisation-vector translation in radar systems - A promising concept for real-time polarisation-vector signal processing via a single-notch polarisation suppression filter

Until fairly recently, little attention has been given to the utilization of information contained within the polarization states of back-scattered signals relative to the polarization state of the transmitted signal. The same situation exists with respect to the utilization of information contained with respect to the utilization of information contained within the polarization state of interference signals. However, studies conducted by Poelman and Guy (1984) have been concerned with the possibility to achieve useful improvements in the ability to detect targets in adverse environments by applying signal processing in the polarization domain. This type of signal processing has the aim to improve the ratio of average target signal power to average unwanted signal power. An appropriate concept for doing this has been called 'virtual polarization adaptation' (VPA). The considered process has been improved by extending the VPA concept via the adaptive multinotch logic-product (MLP) polarization suppression filter and the adaptive linear polarization-vector translation (PVT) process.