Improved DV-Hop location method based on optimized reference beacon point

The invention provides an improved DV-Hop location method based on an optimized reference beacon point. The method comprises the steps of acquiring position information of a beacon point and a minimum hop count to the beacon point; estimating the distance from an unknown node to the beacon point; and calculating the position coordinate of the unknown node, wherein firstly, a range equation from the unknown node to the beacon point is expressed as a matrix form, secondly, primary screening is carried out to get a first optimized source matrix, and thirdly, secondary screening is carried out on the primarily screened source matrix to get new source matrixes, one of the new source matrixes is selected as the best matrix, and the reference beacon point corresponding to the best matrix is used as an optimized beacon point to calculate the spatial position of the unknown node. The improved DV-Hop location method based on the optimized reference beacon point can improve the accuracy of location of the coordinate.