To solve the problem of ubiquitous positioning,especially the problem of locating people in GPS-denied environments,an approach for pedestrian positioning based on readings from a smart phone is proposed.The proposed approach is based on the Pedestrian Dead Reckoning(PDR),which estimates the attitude using the gradient descent method to fuse the measurements from accelerometer,gyroscope and magnetometer;Uses the peak detection method to detect new step;estimates the step length using apriori parameter based methods.The real scinario experimental results have demonstrated that the proposed approach can reach an accuracy at error distance ratio of about 1.82%.As the approach is independent of external infrastructures and signals,it has the advantage of good adaptability and practicability.
关键词
轨迹盲推/智能手机/梯度下降/普适定位
Key words
Pedestrian Dead Reckoning/smart phone/gradient descent/ubiquitous positioning
维普
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