| US 7,508,337 B2 | ||
| Radar apparatus and signal processing method | ||
| Mitsutoshi Morinaga, Kokubunji (Japan); and Keiichiro Nagatsuka, Hitachinaka (Japan) | ||
| Assigned to Hitachi, Ltd., Tokyo (Japan) | ||
| Filed on Oct. 31, 2007, as Appl. No. 11/979,222. | ||
| Claims priority of application No. 2006-316978 (JP), filed on Nov. 24, 2006. | ||
| Prior Publication US 2008/0122680 A1, May 29, 2008 | ||
| Int. Cl. G01S 13/42 (2006.01) | ||
| U.S. Cl. 342—109 [342/70; 342/112; 342/128; 342/129; 342/130] | 19 Claims |
| 1. A radar apparatus comprising:
a signal generating unit;
a transmitting unit;
a receiving unit; and
a receiving signal processing unit,
wherein a transmitting signal generated with the signal generating unit and radiated from the transmitting unit including,
within a unit modulating section, a first modulating section on the time axis for transmitting a radio wave in accordance
with at least a couple of sweep frequency straight lines having frequency slopes for the time axis with periodical switching
transition, and a second modulating section on the time axis for transmitting the radio wave in accordance with at least a
couple of sweep frequency straight lines having no frequency slope for the time axis with the periodical switching transition,
and
wherein the signal processing unit has a function for obtaining at least one of distance to a target or a relative speed by
processing a reflected wave of the transmitting signal reflected by the target and received with the receiving unit.
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