Mathematics Signal processing Wavelets (Mathematics) 10 Digital techniques 9 Image processing 7 System analysis 7 Mathematical models 5 Radar 5 Bayesian statistical decision theory 4 Coding theory 4 Probabilities 4 Stochastic processes 4 Fourier transformations 3 Wireless communication systems 3 Automatic tracking 2 Data transmission systems 2 Electric filters 2 Electrical engineering 2 Estimation theory 2 Expert systems (Computer science) 2 Finite strip method 2 Frequency spectra 2 Hilbert space 2 Imaging systems 2 Modems 2 Modulation (Electronics) 2 Multisensor data fusion 2 Target acquisition 2 Time-domain analysis 2 Time-series analysis 2