Radar apparatus, on-board radar system, and program

Abstract

A radar apparatus includes a transmitting antenna, a triangular wave generating unit that generates a first modulated wave and a second modulated wave which are transmitted from the transmitting antenna at a predetermined interval, a receiving antenna that receives radio waves obtained by causing an object to reflect the transmitted first and second modulated waves, and a signal intensity calculating unit that makes a determination, on peaks equal to or greater than a predetermined value appearing in received signals which are received by the receiving antenna and which correspond to the first and second modulated waves, as to whether the peaks are due to a signal obtained by causing the object to reflect the transmitted wave emitted from a host radar device or the peaks are due to a signal obtained by causing a reflecting object including the object to reflect the transmitted wave emitted from another radar device.

Description

technical field [0001] The present invention relates to a radar device, a vehicle-mounted radar system, and a program. Background technique [0002] In recent years, the demand for safety support systems in automobiles has increased. Among them, the cost reduction of millimeter-wave radars for vehicles (hereinafter referred to as radars) is advancing, and the number of vehicles equipped with radars has increased, and it has also been proposed to install A system of multiple radars. As vehicle-mounted radars, FM-CW (Frequency Modulated Continuous Wave) radars, multi-frequency CW (Continuous Wave, continuous wave) radars, and electronic scanning radars using pulse radars are often used. [0003] Image 6 (a), Image 6 (b), Image 6 (c) is a conceptual diagram showing the relationship between a radar-equipped vehicle and generation of interference waves. Image 6 (a) shows an example when two vehicles equipped with radars face each other. in addition, Image 6 (b) shows an ex...

AI Technical Summary

Problems solved by technology

[0014] However, in the case where the above-mentioned obliquely polarized waves are used, only Image 6 The opposite state of (a) is valid, such as Image 6 (b), Image 6 (c) In the case of the state in the same direction, the effect is extremely small

Circularly polarized waves can also be used as polarized waves, but the structure is complicated, so there are problems such as increased cost and increased size

[0015] In addition, as in the technology described in the above-mentioned Patent Document 1, if the frequency band and the modulation period of the transmission wave are changed, the resolution of the relative distance and the relative speed will change, so there is a possibility of setting parameters that match the resolution. The processing of the subsequent stage brings about the problem of affecting the

In addition, there is a problem that the transmission signal is changed after the interference is sensed, and therefore, the interference state occurs at least until the interference is sensed, and there is a problem in the period when a virtual image generated by the interference wave is output.

Images