US 2006/0214839 A1Published application

Radar apparatus and radar signal processing method

AssigneeMitsubishi Denki Kabushiki Kaisha

InventorMasashi Mitsumoto

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Abstract

A radar apparatus calculates distances or relative speeds of a target according to a plurality of formulae. An predicted distance calculation formula is obtained at the following observation from the distances or the relative speeds thus calculated. A determination is made as to whether the distance calculation formula at the current observation is equal to the predicted distance calculation formula, and only when they are equal to each other, the result of the calculation is output. A distance, a relative speed and a distance calculation formula at the following observation are calculated, and a determination is made as to whether there is a correlation between the result at the current observation and the result of the prediction section. Only the result of the calculation at the current time point is output in the presence of a correlation.

Claims6

Dependent claims

A radar apparatus in which a transmission wave based on a frequency modulated transmitted signal comprising an up modulation period and a down modulation period is irradiated onto a target, and a reflected wave from said target is received as a received signal, so that said target is detected by observing a beat signal generated by mixing said transmitted signal and said received signal, thereby measuring a distance or a relative speed to said target, said apparatus comprising:

a distance and speed calculation section that calculates, as candidates for one target at the current observation, distances or relative speeds with respect to said one target by using a plurality of formulae;
an prediction section that obtains an predicted distance calculation formula at the following observation from said distances or relative speeds calculated at the current observation;
a correlation determination section that determines whether said distance calculation formula at the current observation is equal to said predicted distance calculation formula at the current observation predicted from the last observation;
and
a target selection section that outputs the calculation result of said distance and speed calculation section only when said prediction distance calculation formula at the current observation is equal to said predicted distance calculation formula predicted from the last observation.

2 more elements

A radar signal processing method for a radar apparatus in which a frequency modulated transmitted signal comprising an up modulation period and a down modulation period is irradiated onto a target, and a reflected wave from said target is received as a received signal, so that said target is detected by observing a beat signal generated by mixing said transmitted signal and said received signal, thereby measuring a distance or a relative speed to said target, said method comprising:

a first step of calculating, as candidates for one target at a current observation, distances or relative speeds with respect to said one target by using a plurality of formulae;
a second step of obtaining an predicted distance calculation formula at the following observation from said distances or relative speeds calculated at the current observation;
a third step of determining whether said distance calculation formula at the current observation is equal to said predicted distance calculation formula at the current observation predicted from the last observation;
and
a fourth step of outputting the calculation result obtained in said first step only when said prediction distance calculation formula at the current observation is equal to said predicted distance calculation formula predicted from the last observation.

2 more elements

Dependencies are inferred from the claim text.