Optimized subsampling frequency selection for nonlinear systems

Due to the presence of intermodulation products, a nonlinear system driven by a band pass signal will generate at its output a set of undesired signal bands. When detecting such signals using subsampling, one has to take into consideration these distortions in order to successfully down convert the signal of interest. Even though we are only interested in one band, the available spectrum configuration requires the use of multiband subsampling theory which leads to very tight constraint on the possible subsampling frequency ranges. In this paper a modified version of the multiband subsampling algorithm is presented. This proposed solution is more adapted to nonlinear systems and helps relax the constraints on sampling frequency.