Multiple Technology Choices for a Mixed Analog-Digital Space Radio-Astronomy Spectrometer
For analysing the sub-millimeter radiation received by a astronomy satellite, a hybrid analog-digital spectrometer is planned. As a critical part of this instrument, a specific digital signal processing chip set is proposed. A first strategy is based on a GaAs MESFET chip expected to perform 52 giga-operations per second with a 400 MHz clock frequency. While this strategy gave encouraging results and remains the main line of the project, a second strategy based on parallelism on silicon only is under study, and the opportunity of working simultaneously on two opposite approaches is discussed.
KeywordsReference Architecture Full Custom Digital CMOS CMOS Chip Parallel Core
Unable to display preview. Download preview PDF.
- W. J. Wilson, “Radiometer Spectrometers for Space”, in “Coherent Detection at Millimeter Wavelength and Applications”, pp 163–179, Nova Science Publishers, New York, 1991.Google Scholar
- S. Weinreb, “Analog-Filter Digital-Correlator Hybrid Spectrometer”, IEEE Transactions on Instruments and Measurement, IM-34, No4, pp 670675, December 1985.Google Scholar
- B. F. C. Cooper, “Correlators with Two-bit quantization”, Australian Journal of Physics, Vol 23, pp. 521–527, 1970.Google Scholar
- J.F. Lopez, V. de Armas, J.A. Montiel, “VLSI GaAs Experience Using H-GaAs II Technology”, proc. 4th Eurochip Workshop, Toledo, Oct. 1993.Google Scholar
- R. Sarmiento, P.P. Carballo, A. Nunez, “High Speed Primitives for Hardware Accelerators for DSP in GaAs Technology”, IEE proceedings-G, Vol. 139, No2, April 1992.Google Scholar
- Noullet J.L., Giard M., Crete E., Lagrange D., Mayvial J.Y., Torres M., Ferreira A., “Digital GaAs MESFET Chip for a Radio-Astronomy Spectrometer”, European Design and Test Conference EDTC’95, Paris, March 1995. (This paper obtained the “Best Academic Asic Award” at EDTC’95)Google Scholar