Filtering real signals through frequency modulation and peak detection in the time-frequency plane
نویسندگان
چکیده
2 Time-Frequency Distribution A novel technique for filtering a real signal is preIF Estimation sented. The method is based upon encoding the signal as an instantaneous frequency (IF) and using IF analysis techniques to recover a filtered version of it. A general iterative time-frequency peak filtering (TFPF) scheme based on this method is formulated. Simulations are given which show extremely clean recovery of signals in noise levels down to -$ dB. Applications to estimating the polynomial phase coeficients of nonstationary signals and dijferentiating noisy signals are presented.
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