The Unified Discrete Fourier-Hartley Transforms Processor

This paper presents a novel architecture of 256-point unified discrete Fourier-Hartley transform (UDHFT) processor for digital signal processing applications. The proposed architecture uses a UDHFT theory which can calculate the discrete Fourier and Hartley transforms (DFT, DHT) of types I-IV and the discrete cosine and sine transforms (DCT, DST) of types II-IV; moreover, the architecture utilizes the general existing fast Fourier transform (FFT) IP-core working with pre- and post-processing unit to process the entire UDHFT transforms. We implemented the proposed architecture on the Xilinx Virtex-H Pro FPGA. It achieves 256-point UDHFT transforms in 9.25 mus at 100 MHz operating clock frequency