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Stepan Lapshev

Doctor of Philosophy, (Engineering)
Study Completed: 2018
College of Sciences


Thesis Title
CMOS VLSI Correlator Design for Radio-Astronomical Signal Processing

Read article at Massey Research Online: MRO icon

Multi-element radio telescopes employ methods of indirect imaging to capture the image of the sky. In these instruments, multiple antenna signals are combined using the computationally expensive process of correlation. The unprecedented scale of future telescopes such as the Square Kilometre Array (SKA) will require novel and very efficient correlator implementations. The SKA will use the FX correlator structure that consists of the F part that translates signals into frequency domain and the X part that performs cross-correlations. Mr Lapshev designed application-specific integrated circuits for the X part of very large FX correlators. A correlator architecture that optimises memory usage and reduces power within the designed correlation processing circuits was developed. The main implementation technology was the 28 nanometre (nm) complementary metal oxide semiconductor (CMOS) with some circuits prototyped in the 130 nm CMOS.

Associate Professor Rezaul Hasan
Dr Andrew Ensor
Associate Professor Edmund Lai