Accession Number : ADA563797


Title :   Generating Correlated Gamma Sequences for Sea-Clutter Simulation


Descriptive Note : Technical rept.


Corporate Author : DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA)


Personal Author(s) : Dong, Yunhan ; Rosenberg, Luke ; Weinberg, Graham V


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a563797.pdf


Report Date : Mar 2012


Pagination or Media Count : 33


Abstract : This report presents a hybrid method for simulating sequences of correlated Gamma random variables for modelling sea clutter, using a combination of linear and/or non-linear transforms. Depending on the shape parameter, this method minimises the use of non-linear transformations. Mathematically the method is simpler than its counterpart methods which leads to a quicker simulation run time. Two memoryless non-linear transform (MNLT) approaches are also studied with comparative results showing that the hybrid approach is more computationally efficient and slightly more accurate for low shape parameters. The drawback of the proposed method is, however, that it can only handle positive correlations whilst the two MNLT methods are capable of handling both positive and negative correlations.


Descriptors :   *SEA CLUTTER , AUSTRALIA , CORRELATION , GAMMA RAYS , NONLINEAR SYSTEMS , RADAR , RANDOM VARIABLES , SIMULATION


Subject Categories : Active & Passive Radar Detection & Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE