雷达设备

Radar apparatus

Abstract

雷达设备包括发射部、接收部和估计部。发射部(16)包括朝对象发出作为雷达波的发射信号的发射器元件(30)。接收部(20)包括接收反射信号的接收器元件(34)。估计部生成包括虚拟接收器元件的虚拟接收阵列,虚拟接收器元件的数量对应于接收器元件(34)的总数乘以发射器元件(30)的总数。估计部将虚拟接收阵列划分成相同的子阵。估计部生成每个子阵的协方差矩阵数据。估计部对协方差矩阵数据进行求平均,并且对反射信号进行空间平滑。估计部对多径反射信号和来自对象的直接反射信号进行解析。估计部确定对象的方位。
A radar apparatus includes a transmitting portion, a receiving portion, and an estimation portion. The transmitting portion (16) includes transmitter elements (30) emitting a transmitting signal as a radar wave toward an object. The receiving portion (20) includes receiver elements (34) receiving a reflection signal. The estimation portion generates a virtual receiving array including virtual receiver elements whose number corresponds to a total number of receiver elements (34) multiplied by a total number of transmitter elements (30). The estimation portion divides the virtual receiving array into identical sub-arrays. The estimation portion generates covariance matrix data for each of the sub-arrays. The estimation portion averages the covariance matrix data and spatially smooths the reflection signal. The estimation portion resolves the direct reflection signal from the object and the multipath reflection signal. The estimation portion determines the direction of the object.

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