| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce a computational load of target number estimation performed in a stage prior to angle estimation and to improve estimation accuracy, in a detection and ranging device. <P>SOLUTION: A pseudo-spatial-average-covariance-matrix generating unit 104b-6 selects, from matrixes R<SB>f1</SB>, R<SB>f2</SB>, R<SB>b1</SB>, and R<SB>b2</SB>, one appropriate matrix or two or more appropriate matrixes for combination to generate a pseudo-spatial-average-covariance matrix R. A pseudo-spatial-average-covariance-matrix Hermitian-conjugate product generating unit 104c-1 generates a target-count-estimation matrix RR<SP>H</SP>. A target-count-estimation-matrix decomposing unit 104c-2 performs LU decomposition on RR<SP>H</SP>into a lower triangular matrix L and an upper triangular matrix U. An index generating unit 104d-1 generates an index using elements of the upper triangular matrix U. An index-parameter scanning unit 104d-2 estimates a target count m by using the index generated by the index generating unit 104d-1. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
