Research on the IGPS device error and its influence of positioning accuracy

Indoor Global Positioning System (IGPS) is one of the most commonly used methods for indoor high-precision positioning. In order to improve the accuracy of IGPS essentially, this paper studies the device error and its influence on positioning accuracy through introducing the intermediate variable named scanning angle error. The relationship between positioning accuracy, device error and scanning angle error is derived respectively, and then this paper establishes the optimal relation formula of positioning accuracy and scanning angle error, analyzes the influence of device error on scanning angle error by modeling and simulating. Based on these, this paper proposes the improvement method of positioning accuracy from the view of device design to providing support for IGPS design.