Algorithm 2 Construction of hopping sequence $H{S}_j$ for rendezvous operation of a SU receiver j.

Input:$X_j$, $Y_j$, $\mathrm{P}$;

Output: $H{S}_j$

1: Randomize the order of $X_j$;

2: $H{S}_j\leftarrow \varnothing$;

3: $k\leftarrow 1$;

4: while $k\le Y_j$ do

5:  $l\leftarrow 1$;

6:  while $l\le Y_j$ do

7:   $H{S}_j((k-1)\mathrm{P}+l)\leftarrow X_j\left(k\right)$;

8:   $l\leftarrow l+1$;

9:  end while

10:  $k\leftarrow k+1$;

11: end while

12: return $H{S}_j$;