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A Low-Power FFT / IFFT Accelerator for Optical Coherence Tomography

Optical coherence tomography(OCT) is an optical signal acquisition and processing method. It is viewed as the optical analogy of ultrasound sonogram. In the practical use of such systems, real-time performance is essential. However, the image reconstruction is very computation-intensive because of huge volume of numeric operations. One of the most timeconsuming operations is the FFT/IFFT[1]. Although real-time performance can be achieved by using highend GPGPU (NVIDIA GeForce GTX 580)[1], considering the power it consumes, about 250W(max)[2], a more power-efficient method is needed.