CORDIC‐based Hann windowed sliding DFT architecture for real‐time spectrum analysis with bounded error‐accumulation
Tanmai Kulshreshtha, Anindya Sundar Dhar · IET Circuits Devices & Systems · 2017
This study presents a COordinate rotation DIgital computer (CORDIC)‐based novel architecture combining the sliding discrete Fourier transform (DFT) with Hann windowing to reduce the leakage effect of the DFT spectrum. The proposed architecture also presents a refreshing approach to minimise error due to the finite word‐length in the output windowed spectrum compared with the existing method. The architecture can also be extended for other high order generalised cosine windows such as Blackman, Blackman–Harris, and flat‐top. The post‐route results on the Virtex‐6 FPGA as well as the physical ASIC post‐layout results are also presented for the proposed architecture.