Transform Digital Signal Processor Architecture using Optical Interconnections

A.B.T. Hopkins and K.D. McDonald-Maier (UK)


Architecture, Digital signal processing (DSP), Optical interconnect, Optoelectronics.


This paper investigates the effects of using optical interconnects within multiple chip transform Digital Signal Processor (DSP) architectures. It demonstrates how optical interconnects can be used to compute the Fast Fourier transform and similar transforms. A novel DSP architecture using shared memory inter processor communications is identified. With the aid of fully synthesisable VHDL models it is shown that electronic circuits combined with an optical chip-to-chip communication system can be used to achieve a performance increase over traditional purely electronic circuits. The performance limiting factor is found to be with the electronic circuits and not the optical interconnects.

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