Stefan Back Andersson

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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)
ii This is a Doctorate Thesis. Swedish postgraduate education leads to a Doctor's degree and/or a Licentiate's degree. A Doctor's Degree comprises 240 ECTS credits (4 years of full-time studies). A Licentiate's degree comprises 120 ECTS credits, of which at least 60 ECTS credits constitute a Licentiate's thesis. Linköping studies in science and technology.(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)