ANGLE ESTIMATING APPARATUS AND ANGLE ESTIMATING METHOD

摘要

A receiving circuit uses a weight set by calibration to weight signals incident to receiving elements. A storing unit stores a measured value of a mode vector reflecting characteristics of the receiving circuit in an error-free state of the weight for the receiving circuit characteristics and further correlates and stores an incident signal angle estimated by an estimating unit, and for the error-free state, a calculation result of an evaluation value by an evaluation function capable of calculating the evaluation value, which varies according to the incident signal angle and error. A detecting unit calculates the evaluation value based on the stored measured value of the mode vector and the evaluation function and detects an occurrence of the error based on comparison of the calculated evaluation value and the stored evaluation value, when the estimated incident signal angle corresponds to a value close to the stored incident signal angle.

主权项

1. An angle estimating apparatus comprising:
a receiving circuit configured to include a signal processor and a plurality of receiving elements, and to use a weight set by calibration to weight respective signals incident to the plurality of receiving elements; an estimating circuit configured to estimate based on the respective signals weighted by the receiving circuit, an incident angle of the respective signals; a storing circuit configured to store a measured value of a mode vector reflecting characteristics of the receiving circuit in an error-free state of the weight for the characteristics of the receiving circuit, and to correlate and store the incident angle of the respective signals estimated by the estimating circuit, and for the error-free state, a calculation result of an evaluation value by an evaluation function capable of calculating the evaluation value, which varies according to the incident angle of the respective signals and error; a detecting circuit configured to calculate the evaluation value based on the evaluation function and the measured value of the mode vector stored by the storing circuit, when the incident angle of the respective signals estimated by the estimating circuit is an angle corresponding to a value close to the incident angle of the respective signals stored by the storing circuit, and to detect occurrence of error, based on comparison of the evaluation value stored by the storing circuit and the calculated evaluation value.