Integrated Circuits and Embedded Systems

Indoor positioning technology based on CSI phase sampling density

CHENG Cheng, WANG Wei

Integrated Circuits and Embedded Systems, 2024, 24(1): 73-77.

采样间隔/m	采样点个数	采样密度 (个/m²)	最大误差/m	最小误差/m	平均误差/m
0.3	196	12.3	0.59	0.22	0.38
0.4	121	7.6	0.51	0.18	0.34
0.5	81	5.1	0.57	0.21	0.36
0.6	64	4.0	0.65	0.26	0.45
0.7	49	3.1	0.71	0.31	0.49
0.8	36	2.3	0.87	0.35	0.57

Table 1 Experimental errors for different sampling densities

Other figure/table from this article

Fig. 1 Original phase and corrected phase after processing at three positions
Fig. 2 Correction phase of two different antennas at the same position
Fig. 3 Fingerprint library format
Fig. 4 CSI fingerprint map localization algorithm
Fig. 5 CSI Fingerprint Data Sampling Point Map
Fig. 6 Comparison of positioning errors with different sampling intervals
Table 2 Experimental errors of three algorithms at a sampling interval of 0.3 m (Unit: m)
Table 3 Experimental errors of three algorithms at a sampling interval of 0.4 m (Unit: m)
Table 4 Experimental errors of three algorithms at a sampling interval of 0.5 m (Unit: m)
Fig. 7 Comparison of positioning errors among three algorithms at different intervals