In recent years, the wireless communication has evolved towards multi-function and multi-standard terminals. Reducing the number of external components and the reuse of both digital and RF functional blocks is a key feature when a single terminal has to process a multitude of standards with different data rates, modulation types, and frequency bands.… (More)
—A high-speed low-power cross-correlator ASIC has been implemented in a 65-nm CMOS process for the purpose of synthetic aperture radiometry from geostationary orbiting earth observation satellites. The chip performs cross-correlation on all individual signal pairs from 64 digital 1-bit inputs, which amounts to 2016 individual cross-correlation products. The… (More)
— We present a high-speed low-power 8-channel com-parator tailored for the application of sampling antenna signals in a cross-correlator system for space-borne synthetic aperture radiometer instruments. Features like clock return path, per-channel offset calibration and bias current tuning make the comparator adaptable and gives the possibility to adjust… (More)
demonstrate that aperture synthesis can be a viable approach for Earth observation from a geostationary Earth orbit.