Danyan Lin Gang Wang 0007 K. C. Ho 0001 Xin Liao A Fast Multiplierless Discrete Fourier Transform Approximation by Sparse Factorization Optimization [Tips & Tricks]. 92-97 2025 March 42 IEEE Signal Process. Mag. 2 https://doi.org/10.1109/MSP.2025.3527869 db/journals/spm/spm42.html#LinWHL25 streams/journals/spm