Novel wireless positioning method by adopting distance geometry under NLOS environment
A technology of wireless positioning and a new method, which is applied in the field of cellular network positioning, and can solve problems such as the lack of research on cellular networks
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[0047] The present invention adopts the general model of signal transmission, considering the signal reflection, refraction, etc. caused by the obstacle blocking between the mobile station (MS) and the base station (BS) (that is, non-line-of-sight error), then the measured value obtained by measurement and no error There will be a large deviation compared with the exact measurement value, as shown in the following formula:
[0048] t m =t+ε (1)
[0049] Among them, t m is the actual measured value, t is the measured value in the line-of-sight environment, and ε is the non-line-of-sight error, which is a large positive deviation value. Due to the influence of non-line-of-sight errors in the parameters used in traditional positioning schemes, the positioning accuracy is reduced, such as figure 2 As shown, the measurement values obtained by the mobile station from the three base stations are affected by the non-line-of-sight error, so the positioning results cannot be conce...
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