UWB digital key positioning method and system under multi-anchor-point architecture

The invention provides a UWB digital key positioning method under a multi-anchor-point architecture, and the method comprises the specific steps: S1, completing initial distance measurement through employing a mobile phone UWB digital key and an automobile anchor point, and obtaining an initial distance measurement value; s2, filtering and denoising the initial distance measurement value by using a Kalman filtering algorithm to obtain a denoised distance measurement value of each anchor point; s3, drawing a distance measurement circle at each anchor point according to the denoised distance measurement distance of each anchor point, and estimating a possible area of the UWB digital key; s4, calculating the coordinates of Pos1, Pos2 and Pos3 by using the distance measurement circle position relation; and S5, approaching the real position of the UWB digital key of the mobile phone in the intersection area by adopting an improved weighted centroid algorithm. The method is used for solving the problems that the wh