Degradation due to quantization noise in radio astronomy phased arrays

Kokkeler, A.B.J. and Fridman, P. and van Ardenne, A. (2001) Degradation due to quantization noise in radio astronomy phased arrays. Experimental Astronomy, 11 (1). pp. 33-56. ISSN 0922-6435

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Abstract:	In this paper, a model is develped for determining the probability distribution of the output of a digital ader in case of 2-, 3- and 4-level quantization before summation. This probability distribution is then used to determine the efficiency of a system which determines the total power of the signal at the output of the digital adder. The sumsignal is also used in a VLBI correlation mode where the sumsignal is correlated with the signal from a VLBI partner. The effeciency, expressed in so-called Degradation Factors, is determined for 1- and 2-bit correlation and 2-, 3- and 4-level quantization before summation. Furthermore, the application of the calculated values (Total Power Detector Efficiencies and Degradation Factors) is illustrated.
Item Type:	Article
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Computer Architecture for Embedded Systems (CAES)
Link to this item:	http://purl.utwente.nl/publications/62896
Official URL:	http://dx.doi.org/10.1023/A:1011115316160
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