Xue LIU, Feng YU, Ze-ke WANG. A pipelined architecture for normal I/O order FFT[J]. Frontiers of Information Technology & Electronic Engineering, 2011, 12(1): 76-82.
DOI:
Xue LIU, Feng YU, Ze-ke WANG. A pipelined architecture for normal I/O order FFT[J]. Frontiers of Information Technology & Electronic Engineering, 2011, 12(1): 76-82. DOI: 10.1631/jzus.C1000234.
We present a novel pipelined fast Fourier transform (FFT) architecture which is capable of producing the output sequence in normal order. A single-path delay commutator processing element (SDC PE) has been proposed for the first time. It saves a complex adder compared with the typical radix-2 butterfly unit. The new pipelined architecture can be built using the proposed processing element. The proposed architecture can lead to 100% hardware utilization and 50% reduction in the overall number of adders required in the conventional pipelined FFT designs. In order to produce the output sequence in normal order
we also present a bit reverser
which can achieve a 50% reduction in memory usage.
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