Time difference on arrival (TDOA) locating method based on circumferentially distributed monitoring nodes
A technology for monitoring nodes and circumferential distribution, applied in the field of communication, can solve the problems of small positioning coordinate error, large positioning coordinate error, and failure to obtain the effective position of the target node, so as to achieve the effect of reducing coordinate error and improving accuracy
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[0022] refer to figure 1 , the implementation steps of the present invention are as follows:
[0023] Step 1, according to the known TDOA measurement value R l,1 , the coordinates of monitoring nodes (X j , Y j )), use the Chan algorithm to calculate the coordinates of the target node:
[0024] (1a) When the number of monitoring nodes participating in the calculation of the coordinates of the target node is three, the coordinates (x, y) of the target node are obtained according to the maximum likelihood estimation method:
[0025] x y = - X 2,1 Y 2,1 X 3,1 ...
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