An AOA-Based IMU Error Suppression Method

In the field of positioning technology, the inertial measurement unit is widely used, it has the advantages of low cost and strong anti-interference. However, inertial navigation positioning produces cumulative errors and poor long-term positioning accuracy. This paper presents a method to suppress the cumulative error by measuring the arrival of the angle of a radiation source. By measuring the direction of a position-known radiation source in the inertial navigation plane at different nodes, the least squares method is used to find the current position coordinates of the node, which reduces the cumulative error of the inertial navigation by about 80%.