This work investigates the performance of an all-digital, total-power radiometer (TPR), consisting of RF, mixer, and IF stages followed by an analog-to-digital converter (ADC). Square-law detection and smoothing is performed in a digital computer. A figure of merit, the degradation factor, is defined which compares the digital TPR with an ideal analog TPR. Exact results are obtained which include the effects of saturation, finite step size, and finite sampling rate of the ADC. A good approximation is developed which compares favorably with the exact results under certain conditions. The use of a general digital filter for smoothing is considered. A new parameter, the "equivalent summation number", is shown to be analogous to the equivalent integration time of an analog TPR.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Digital Radiometer Performance


    Contributors:


    Publication date :

    1973-11-01


    Size :

    2175410 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Digital radiometer performance

    Ohlson, J. / Swett, J. | Tema Archive | 1973


    Performance of a 3.3-mm Radiometer

    W. A. Johnson | NTIS | 1968


    Radiometer Housing

    Stein P. J. / Bahlavouni A. | NTIS | 2002


    Compensating radiometer

    Anderson, W. W., Jr. / Miller, H. B. / Sweet, G. E. | NTRS | 1969


    Thermodielectric radiometer.

    Beam, B. H. / Russell, L. D. | NTRS | 1968