# Impletation notes on RFID analytical model of paper "Analytical computation of the mean number of tag identifications during a time interval in FSA"

## Download at this link

• Note 1: The Mathematica function provides formula PHI, which computes the expected identifications in a time (T), given in 0.01 ms unit, when N tags contend. For example: T=100 means 1 ms, 21 means 0.21 ms, and so on.
```
PHI[4,1100]    -> n=4 tags, t = 11 ms
2.10119
```
• Note 2: Computation is very demanding and can take days or weeks in some cases. From here you can download precomputed solutions for some cases. Each file contains a matlab matrix with solutions up to a given time T, and number of tags N. Since indices start in 1 a shift is necessary to access the data. For example, you can use them just:
```		load load phi_DFSA_T300ms_N50

>> who

Your variables are:

Expression1

>> size(Expression1)

ans =

51       30001

Expression1(1,1) -> phi(0 tags, 0 ms)
Expression1(51, 1001) -> phi(50 tags, 10.00ms)
```
• Note 3: Please, see README for further details