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In this article, we present a modified constant-geometry based signal flow graph for memory-based real-valued fast Fourier transform architecture. Without an extra permutation, the corresponding address scheme solves the memory conflict and achieves continuous-flow operation with the minimal memory and computation cycles requirement when compared to the state-of-the-art designs. Besides, the address scheme meets the constraint of in-place operation, concurrent I/O, normal-order I/O, variable size, and parallel processing. The experimental results demonstrate the resource and frequency efficiency of the proposed address scheme.

A Novel Address Scheme for Continuous-Flow Parallel Memory-Based Real-Valued FFT Processor