Advanced superior execution time optimal time-frequency filter suitable for non-linear FM signals estimation

Optimal time-frequency (TF) filter suitable for non-linear frequency-modulated (FM) signals estimation is developed. It is developed to suppress some flaws of the recent state-of-the-art signal adaptive and fully pipelined filtering solutions and, therefore, is based on a new real-time procedure for the filter's region of support estimation, also proposed here. The proposed filter shows superior execution time performances and optimal calculation and hardware complexity properties, so it retains all desirable properties of the signal adaptive solution and the fully pipelined one, but also extends their applicability to the non-linear FM signals. The filter is implemented on the field-programmable gate array (FPGA) device and is proven by testing on real non-stationary multicomponent noisy signals. (C) 2020 Elsevier B.V. All rights reserved.