Suppose that a CDMA system has four orthogonal codes as follows:

V$1=(1,-1,1,-1)$

V$2=(-1,-1,1,1)$

V$3=(1,1,1,-1)$

V$4=(1,-1,-1,1)$

Sender $1$ and receiver $1$ data is encoded with v$1,$ sender$2$ and receiver$2$ with v$2,$ and so on$.$ Suppose that the following data signals are to be transmitted simultaneously:

Sender $1$: $010101$

Sender $2$: $110011$

Sender $3$: $000100$

Sender $4$: $111000$

Show by means of a diagram the encoding of the individual data signals, the generation of the composite signal, and how each receiver interprets the correct signal.