Localization Method for RFID Tags Based on Virtual Landmarks simulation with MATLAB
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I need to simulate 3-D localization method for RFID in MATLAB, the model volumes is through an hexahedron whose length, width, and height are L, W, and H

L = 50m,W = 50m,H = 3m


Step 1: Build the virtual landmark matrix VLM: simulate
reference tags spaced by a pre-defined interval in 3 dimensions.

Step 2: Select all the readers Ri that detect the tag T:

Rd(T) = {Ri : Ri, T ≤ R} ,
where R is the reader range. R = 5m

Step 3: - Inclusive constraints - Select among all virtual
landmarks those that would be detected by readers Ri ∈ Rd:

VLMd(T) = {vi : ∀vi ∈ V LM, ∀Rj ∈ Rd(T), Rj, vi ≤ R} .

Step 4: Select all the readers Ri that do not detect the tag T:
Rnot d(T) = {Ri : Ri, T ≥ R} .

Step 5: - Exclusive constraints - Select among all virtual
landmarks those that would not be detected by readers Ri ∈ Rnot d(T):

VLMnot d(T) ={vi : ∀vi ∈ V LM, ∀Rj ∈ Rnot d(T), Rj, vi ≥ R} .

Step 6: Select only the virtual landmarks that belong to VLMd(T) and not to VLMnot d(T):

VLMfinal(T) = VLMd(T)\VLMnot d(T) .

Step 7: Compute the mean of the virtual landmarks vi ∈ VLMfinal(T) for the x, y, and z coordinates:

N(T) =|VLMfinal(T)|

If any one can help me how to start the matrix of reader position?![enter image description here][2]

I need to re-simulate the following paper: A Range-Free 3-D Localization Method for RFID Tags Based on Virtual Landmarks published by Mathieu Bouet and Guy Pujolle.