Degradation due to quantization noise in radio astronomy phased arrays

Andre B.J. Kokkeler, P. Fridman, A. van Ardenne

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    5 Citations (Scopus)


    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.
    Original languageUndefined
    Article number10.1023/A:1011115316160
    Pages (from-to)33-56
    Number of pages24
    JournalExperimental Astronomy
    Issue number1
    Publication statusPublished - Feb 2001


    • IR-62896
    • EWI-3617

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