Signal Adaptive Hardware Design of a System for Highly Nonstationary FM Signal Estimation
Multiple-clock-Cycle Implementation (MCI) of a signal adaptive optimal nonstationary filtering system is developed. The proposed design is based on the real-time results of time-frequency (TF) analysis, on the correspondence of Filter's Region of Support (FRS) to the signal's Instantaneous Frequency (IF), and on the real-time IF estimation. It permits multiple local FRS detection in the observed time-instant, resulting in the efficient filtering of multi component FM signals. It takes a variable number of CLKs - the only necessary ones regarding the highest quality of IF estimation - in different TF points within the execution. The design also optimizes critical performances related to the hardware complexity, making it a suitable system for implementation on an integrated chip.