一种新的基于STD和SLR融合的AP选取算法

A New AP Selection Algorithm Based on STD and SLR Fusion

为了进一步提升基于RSS(received signal strength)的WiFi室内定位算法的精度和可靠度,本文对比研究了基于标准差(standard deviation,STD)的AP(access points)选取算法和基于信号丢失率(signal loss rate,SLR)的AP选取算法,并提出了新的基于STD和SLR融合的AP选取算法。实验结果表明,基于STD的AP选取算法定位精度受到AP子集个数的影响,当子集个数大于6并继续增加时,定位精度变化不再明显;基于SLR的AP选取算法耗时最少;新的基于STD和SLR融合的AP选取算法定位耗时略大于融合前的两种AP选取算法,但其定位精度和可靠性明显优于其他两种AP选取算法。

In order to further improve the accuracy and reliability of RSS-based WiFi indoor location algorithm,this paper first contrasts the AP selection algorithm based on STD(standard deviation)and the AP selection algorithm based on SLR(signal loss rate)and then proposes a new AP selection algorithm based on STD and SLR fusion.The results show that:STD-based AP selection algorithm is affected by the number of AP subsets,when the number of subsets is greater than 6 and continue to increase,the positioning accuracy is no longer obvious;SLR-based AP selection algorithm is least time-consuming;The new AP selection algorithm based on STD and SLR fusion is slightly larger time-consuming than the two AP selection algorithms before fusion,but its positioning accuracy and reliability are obviously better than the other two AP selection algorithms.