An inverse problem based approach to detection in LPI systems

Most of the wideband low probability of intercept (LPI) signal detectors use energy detection and autocorrelation of the transmitted signal to decide the presence of the signal in an observed band. We propose a method for the detection of such signals using an inverse problem based approach. We compare the receiver operating characteristics (ROC) of this detector with those of conventional detectors. Simulation results indicate better performance of the proposed detector over the other LPI detectors. Furthermore, the proposed scheme is feasible and consistent because it can be implemented with modern digital signal processing of linear order computations whereas the conventional detectors are analog types and inconsistent.