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In this paper, an implementation of low-power, high-speed radix-2 DIT (decimation-in-time) FFT suitable for AAC/DRA audio decoding is presented. For low-power and high-speed considerations, two methods are adopted: adding cache to ROM (ROM-cache) and proposing a new butterfly (AI-Butterfly). Simulations in Matlab have verified the correctness of this implementation. The comparisons between the proposed...
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