EXERCISES $($S$3)$

$1.$ Consider the typical code$-$tree of a OVSF system, represent only the part of the tree

needed $($with the users$)$ that allow to use a maximum of $80\%$ of the system capacity

with the fewest number of users $($more than one user$)$ but occupying each of them the

highest possible bandwidth. Consider the maximum spread factor $($SF$)$ to SF$=128$

$(4$p$)$