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- Title
Time-Frequency Resolving Ability of Short-time Fractional Fourier Transform to FM Signals.
- Authors
LUAN Junbao; DENG Bing
- Abstract
Detection and parameter estimation of frequency modulation (FM) signal is always one of the research focuses in the field of signal processing. In order to find out the advantage of short-time fractional Fourier transform (STFRFT) in processing the FM signals, this paper analyzes the relationship between the time-frequency resolving ability and the parameter of the measured signals through STFRFT's definition, and compares with short-time Fourier transform (STFT). As a conclusion, the time-frequency resolving ability of STFT is related to the signal's frequency fluctuation rate, however, the time-frequency resolving ability of STFRFT has nearly no relationship with the signal's frequency fluctuation rate. The simulation verifies that for the signals with low frequency fluctuation rate, STFT and STFRFT almost have the same time-frequency resolution, but for the signals with high frequency fluctuation rate, STFRFT has the better time-frequency resolution.
- Publication
Telecommunication Engineering, 2015, Vol 55, Issue 7, p773
- ISSN
1001-893X
- Publication type
Article
- DOI
10.3969/j.issn.1001-893x.2015.07.012