Degradation due to quantization noise in radio astronomy phased arrays

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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
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Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/62896
Official URL:http://dx.doi.org/10.1023/A:1011115316160
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