Title :
Design and implementation of the MIRAS digital correlator
Author :
Bätz, Ottfried ; Kraft, Ulrich ; Lindemer, Willi ; Reichel, Hans
Author_Institution :
Dornier Satellite Syst. GmbH, Munich, Germany
Abstract :
The MIRAS imaging radiometer includes a digital one-bit correlator array. The configuration of a future MIRAS flight model features more than 100 antenna elements. This requires a correlator array with more than 10 thousand correlators. The feasibility of MIRAS is demonstrated by a breadboard with 11 complex channels and 110 correlators. The sampling frequency is 50 MHz and the integration time is 285 msec. The described demonstrator uses high speed comparators for analog-to-digital conversion and field-programmable gate arrays (FPGAs) for digital processing. The tests using a specific testbed have shown the difficulty of stimulating the correlators for the purpose of precise calibration. The described correlator has been developed for the European Space Agency
Keywords :
array signal processing; correlators; digital signal processing chips; geophysical equipment; geophysical signal processing; image sampling; integrated circuit design; microwave measurement; radiometers; radiometry; European Space Agency; MIRAS digital correlator; MIRAS imaging radiometer; analog-to-digital conversion; antenna elements; breadboard; calibration; digital one-bit correlator array; digital processing; field-programmable gate arrays; flight model; implementation; integration time; microwave imaging radiometer with aperture synthesis; sampling frequency; Analog-digital conversion; Apertures; Correlators; Energy consumption; Field programmable gate arrays; Frequency; Microwave radiometry; Power measurement; Sampling methods; Testing;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1996. IGARSS '96. 'Remote Sensing for a Sustainable Future.', International
Conference_Location :
Lincoln, NE
Print_ISBN :
0-7803-3068-4
DOI :
10.1109/IGARSS.1996.516505
