In the prior inventions, because of the complexity of the indoor environment, it is hard to guarantee position precision. In this paper provides an improved method that can be adopted to increase the indoor positioning accuracy of handheld positioning device. This method will be the direction of the handheld device position Angle and number of access points two characteristics to join the fingerprint. The two parameters make our normal fingerprint database more abundant. The positioning test results from comparing the normal fingerprint database with the improved fingerprint database prove the later positioning more accurate.
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