A node three-dimensional localization algorithm based on RSSI and LSSVR parameters optimization

Figures & data

Figure 1. Layout of sensor nodes of RF factor $A$ calibration experiment.

Figure 2. RSSI values at 1 m in four different directions.

Figure 3. The relationship between distance and RSSI.

Figure 4. The localization principles of LSSVR in three-dimensional coordinate system.

Figure 5. Average localization error of nodes with different grid width.

Figure 6. Localization time of a single node under different grid widths.

Figure 7. Average localization error of unknown node with different values of ${\sigma }^2$_.

Figure 8. Localization results with the unoptimized parameters.

Figure 9. Localization errors with the unoptimized parameters.

Figure 10. Localization results with the optimized parameters.

Figure 11. Localization errors with the optimized parameters.

Figure 12. Environment of WSN node three-dimensional localization experiment.

Figure 13. Localization results of using the optimized parameters.

Figure 14. Localization errors of five unknown nodes.