Communications: directive radio wave systems and devices (e.g. – Determining velocity – Combined with determining distance and direction
Reexamination Certificate
2008-04-22
2010-10-12
Pihulic, Dan (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining velocity
Combined with determining distance and direction
Reexamination Certificate
active
07812759
ABSTRACT:
A radar apparatus includes a DBF process portion for grouping reception signals over plural channels into plural groups and performing DBF on each group, a summing portion for summing amplitudes or power of frequency components obtained by the DBF performed by the DBF process portion on each group, a peak detecting portion for detecting a peak frequency of a signal of the electric wave reflected by a target from results of the summation at the summing portion, a distance/speed calculating portion for calculating the distance and speed of the target based on the peak frequency, and an angle calculating portion for extracting a frequency component of the peak frequency detected by the peak detecting portion to calculate the angle of the electric wave reflected by the target. Thus, the amount of DBF calculation can be reduced, and a highly accurate positional information of the target can be obtained.
REFERENCES:
patent: 2005/0156780 (2005-07-01), Bonthron et al.
patent: 2005/0225481 (2005-10-01), Bonthron
patent: 2009/0322592 (2009-12-01), Kai
patent: 2001-91617 (2001-04-01), None
patent: 2002-131420 (2002-05-01), None
patent: 2004198312 (2004-07-01), None
Ralph O. Schmidt, “Multiple Emitter Location and Signal Parameter Estimation”, IEEE Transactions on Antennas and Propagation, Mar. 1986, pp. 276-280, vol. AP-34, No. 3.
Japanese Office Action dated Mar. 2, 2010.
Mitsubishi Electric Corporation
Pihulic Dan
Sughrue & Mion, PLLC
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