Title :
Spectrometers for (sub)mm radiometers
Author :
Emrich, A. ; Andersson, S. ; Knis, M.
Author_Institution :
Omnisys Instrum. AB, Goteborg
Abstract :
The autocorrelation spectrometer is one of 5 types of spectrometers being considered for (sub)millimetre heterodyne radiometer systems. The advantages of the digital autocorrelation spectrometer compared to chirp transform, acousto optical and filterbank spectrometers are; stability, compactness, high reliability and variability in bandwidth and resolution. FFT spectrometers based on the latest generation of FPGA devices now promise a cost effective alternative for low to medium bandwidth applications with high resolution requirements. Omnisys has designed and implemented several generations of autocorrelation chip sets and spectrometers. This range from the ODIN satellite spectrometers now in LEO to our current 8 GHz single chip spectrometer under development.
Keywords :
correlation methods; fast Fourier transforms; field programmable gate arrays; radiometers; spectrometers; submillimetre wave spectroscopy; FFT spectrometer; FPGA devices; ODIN satellite spectrometer; Omnisys; digital autocorrelation spectrometer; fast Fourier transform; field programmable gate array; frequency 8 GHz; single chip spectrometer; submillimetre heterodyne radiometer system; Autocorrelation; Bandwidth; Chirp; Field programmable gate arrays; Filter bank; Optical filters; Optical mixing; Radiometers; Spectroscopy; Stability;
Conference_Titel :
Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006. IRMMW-THz 2006. Joint 31st International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0400-2
Electronic_ISBN :
1-4244-0400-2
DOI :
10.1109/ICIMW.2006.368522
