Fig. 6
![Fig. 6](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13638-018-1329-5/MediaObjects/13638_2018_1329_Fig6_HTML.png)
RMSE comparison of proposed RSSD-WLSFG algorithm and RSSD-FG algorithm. The iteration number changes from 1 to 20 times with 1.5-m grid distance, four APs, and mχ = 25 dB
RMSE comparison of proposed RSSD-WLSFG algorithm and RSSD-FG algorithm. The iteration number changes from 1 to 20 times with 1.5-m grid distance, four APs, and mχ = 25 dB