A continuous flow mixed-radix FFT architecture with an in-place algorithm

Real - time base band processing architectures for wireless MIMO communication systems

“…For streaming applications the memory-based FFT architectures, need additional memories to store the input data of the next FFT frame, while processing the current FFT frame, and to forward the previous FFT frame. There are several techniques to reduce the storage requirements of these Continuous-flow memory-based FFT architectures [11], [241]. (outputs of first FFT stage) and writes the results to Memory A.…”

“…Authors in [11] present a mixed radix-4/2 in-place FFT architecture, based on the conflictfree addressing scheme of [127]. Exchange circuits on the input and output ports of the butterfly are used, on specific FFT stages, to avoid memory conflicts and to ensure continuous flow operation with only two memory modules.…”