ANALYSIS OF K-DISTRIBUTED CLUTTER PARAMETERS FOR VARIOUS GEOGRAPHICALFEATURES

Weibull distribution and log normal distribution among others have bee n used to describe the amplitude distribution in clutter. The K-distri bution, proposed more recently attracts attention because its paramete rs are able to explain the physical nature of clutter. The relationshi p between the K-distribution parameters and the nature of geographical features is clarified in this paper. Differences in experimental cond itions and small amounts of non-object clutter in the geographical fea tures influence the parameters. We show that this influence can be red uced by a limiter related to average electric power. We show that the distribution, obtained by pulse integration and unification processing , and using a limiter several times, conforms to a gamma distribution. In these experiments, this method, using the same radar, is applied t o clutter from various geographical features to obtain the K-distribut ion parameter. The K-distribution parameter is used to compare the rel ation between various geographical features. Finally we show that the power distribution before pulse integration or the clutter voltage dis tribution conforms to a K-distribution with the same shape and scale p arameter as the gamma distribution. (C) 1998 Scripta Technica, Electro n Comm Jpn Pt 1, 82(2): 57-65, 1999.