Optimal design of orders of DFrFTs for sparse representations - Zhang, Xiao-Zhi; Ling, Bingo Wing-Kuen; Tao, Ran; Yang, Zhi-Jing; Woo, Wai-Lok; Sanei, Saeid; Teo, Kok L (IET signal processing, 2018)
Keywords: concave programming; constrained optimisation problem; DFrFT orders; discrete Fourier transforms; discrete fractional Fourier transforms; harmonic functions; L1 ‐norm nonconvex objective function; optimal design; optimal frequency sampling problem; overcomplete transform; Research Article; signal representation; signal sampling; sparse representations; time‐frequency plane; discrete Fourier transforms; discrete fractional Fourier transforms; sparse representations; constrained optimisation problem; DFrFT orders; signal representation; L1-norm nonconvex objective function; optimal design; overcomplete transform; time-frequency plane; optimal frequency sampling problem; signal sampling; harmonic functions; concave programming