32k spectrometer design with a combined 32768-points FFT (16 × 2048), running on a Xilinx Virtex6 LX240T FPGA. Data width grows by log (4) + 1 bits in four-tap WOLA, by log (32768) + 1 bits in 32 768-points FFT, by 1 bit during channel transformation and is doubled by squaring.
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