CORDIC-based Hann windowed sliding DFT architecture for real-time spectrum analysis with bounded error-accumulation
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.