| US 7,525,478 B2 | ||
| Radar signal processor | ||
| Gaku Takano, Tokyo (Japan); Chiharu Yamano, Tokyo (Japan); Kazuma Natsume, Aichi-ken (Japan); Yasuyuki Miyake, Aichi-ken (Japan); and Yasushi Sakuma, Aichi-ken (Japan) | ||
| Assigned to Denso IT Laboratory, Inc., Tokyo (Japan); and Denso Corporation, Aichi-Ken (Japan) | ||
| Filed on Mar. 15, 2006, as Appl. No. 11/376,625. | ||
| Claims priority of application No. 2005-100324 (JP), filed on Mar. 31, 2005. | ||
| Prior Publication US 2007/0024492 A1, Feb. 01, 2007 | ||
| Int. Cl. G01S 13/56 (2006.01); G01S 13/93 (2006.01) | ||
| U.S. Cl. 342—145 [342/70; 342/189] | 5 Claims |
| 1. A radar signal processor comprising:
two or more observation means for receiving a reflected wave from a target as a received signal through a receiving antenna
and for outputting a predetermined observation signal;
means for respectively extracting a distance component corresponding to a distance to a target to be detected from said receiving
antenna from said each observation signal;
means for estimating a correlation matrix, for collecting respective said extracted distance components and for computing
and estimating an estimated value of a correlation matrix corresponding to said respective distance components with a forgetting
factor corresponding to said each distance component as a parameter by an exponential smoothing method;
means for estimating a presence and a movement state of a target, for estimating a presence of a target and movement state
of said target on the basis of said respective estimated value of said correlation matrix which was estimated by said means
for estimating correlation matrix; and
means for determining a forgetting factor depending on distance, for respectively computing and determining said forgetting
factors corresponding to said distance to said target to be detected from said receiving antennas, and for respectively outputting
said computed and determined forgetting factors as said forgetting factors corresponding to said respective distance components
to said means for estimating a correlation matrix.
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