A High-Speed Low-Complexity Modified Radix-25 FFT Processor for Gigabit WPAN Applications
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A High-Speed Low-Complexity Modified Radix-25 FFT Processor for Gigabit WPAN Applications
Abstract—a novel modified radix-25 algorithm for 512-point fast Fourier transform (FFT) computation and high-speed eight-parallel data-path architecture for multi-gigabit wireless personal area network (WPAN) systems. The proposed FFT processor can provide a high data throughput and low hardware complexity by using eight-parallel data-path and multi-path delay-feedback (MDF) structure. The modified radix-25 FFT algorithm is also realized in our processor to reduce the number of complex multiplications and twiddle factor look-up tables. The proposed FFT processor has < Final Year Projects > been designed and implemented with 90nm CMOS technology in a supply voltage of 1.2V. The proposed 512-point modified radix-25 FFT/IFFT processor has a throughput rate of up to 2.8 GS/s at 350 MHz while requiring much smaller hardware complexity and low power consumption.
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