Multitarget Position-Sensitivity Security Transmission with OAM-DM Based on FDA

Table 1

Receive vectors corresponding to different data sets.

Sequence zn	Binary bit	OAM-DM symbol
0	00	(d, δ, γ, t)
1	10	j (d, δ, γ, t)
2	11	− (d, δ, γ, t)
3	01	−j (d, δ, γ, t)