Consider the simultaneous pair$-$wise communication sessions: S$1-$S$3$ and S$2-$S$4,$ where S$1$ sends

$110$ and S$2$ sends $011.$ Show how S$3$ extracts its data from the combined signal resulting from

the simultaneous transmissions of S$1$ and S$2.$ Note that S$3$ knows the Walsh code of S$1($and vice

versa$)$ when the S$1-$S$3$ session is active.

C: Show that S$3$s CDMA code cannot recover the data of station S$2$ even though S$3$ overhears signals

generated in the S$2-$S$4$ communication session $($i$.$e$.,$ S$3$s attempt to use its own Walsh$-$code $++$

on the combined signal will yield a blank at $0$ volt$)6$