Estimation of target distance based on fractional Fourier transform analysis of active sonar linear frequency modulation signals

Recognition of Radar Signals Modulation Based on Short Time Fourier Transform and Reduced Fractional Fourier Transform ⋆

As the useful time-frequency tool, the Fractional Fourier Transform (FRFT) and the Short Time Fourier Transform (STFT) have a great development of signal recognition. And the Reduced Fractional Fourier Transform (RFRFT) was recently proposed and has been used in the recognition and estimation of chirp signals. A new method based on STFT and RFRFT is presented for radar signals modulation recogn...

Chapter 5 Target Detection in Active Sonar using Fractional Fourier Transform

Sonar Signal Enhancement Using Fractional Fourier Transform

Frequency modulation Fourier transform spectroscopy

A new method, FM-FTS, combining Frequency Modulation heterodyne laser spectroscopy and Fourier Transform Spectroscopy is presented. It provides simultaneous sensitive measurement of absorption and dispersion profiles with broadband spectral coverage capabilities. Experimental demonstration is made on the overtone spectrum of C2H2 in the 1.5 μm region. OCIS codes: 120.6200, 300.6300, 300.6380, 3...

Fractional Fourier Transform Based Pilot Symbol Assisted Modulation

In this study, a novel Fractional Fourier transform (FrFT) based pilot symbol assisted modulation (FPSAM) technique for channel estimation has been proposed. In FPSAM, the received pilot symbols are processed in fractional Fourier domain before being used for channel estimation. In practice, the channel estimation is done by sending known training (pilot) symbols along with the information symb...