Initial results from the GeoSTAR-II laboratory demonstrator

Lim, Boon; Gaier, T.; Kangaslahti, Pekka; Lambrigtsen, Bjorn; Tanner, Alan

doi:10.1109/igarss.2012.6351303

Cited by 4 publications

(1 citation statement)

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“…Two prototypes have been developed under the GeoSTAR initiative. The GeoSTAR II prototype [11] succeeding GeoSTAR I [12] has three arms, each with 16 antenna elements where the previous had eight. The same cross-correlator was used for both prototypes.…”

Section: Related Workmentioning

confidence: 99%

1.6 GHz Low-Power Cross-Correlator System Enabling Geostationary Earth Orbit Aperture Synthesis

Ryman

Emrich

Andersson

et al. 2014

IEEE J. Solid-State Circuits

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We present a 64-channel cross-correlator system for space-borne synthetic aperture imaging. Two different types of ASICs were developed to fit into this system: An 8-channel comparator ASIC implemented in a 130 nm SiGe BiCMOS process technology performs A/D conversion, while a single 64-channel digital cross-correlator ASIC implemented in a 65 nm CMOS process performs the signal processing. The digital ASIC handles 2016 cross-correlations at up to 3.6 GS/s and has a power dissipation of only 0.13 mW/correlation/GHz at a supply voltage of 1 V. The comparator ASIC can handle sample rates of at least 4.5 GS/s with a power dissipation of 47 mW/channel or 1 GS/s with a power dissipation of 17 mW/channel. The assembled system consists of a single board measuring a mere 136 136 mm and weighing only 135 g. The assembled system demonstrates crosstalk of 0.04% between neighboring channels and stability of 800 s. We provide ASIC and system-board measurement results that demonstrate that aperture synthesis can be a viable approach for Earth observation from a geostationary Earth orbit.

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Section: Related Workmentioning

confidence: 99%