$4.$ Implement CDM in Java programming language. Your input should be the chip sequences and the transmissions, output should be recovery of each station's signal. Use the chip sequences of the stations from the example from slide$/$book$.$ Print the sample input$-$output of that example at the end of your code.Code Division Multiplexing

Multiple simultaneous transmissions are separated using coding theory.

To transmit a $1$ bit, a station sends its chip sequence. To transmit a $0$ bit, it sends

the negation of its chip sequence.

$A=(-1-1-1+1+1-1+1+1)$

$B=(-1-1+1-1+1+1+1-1)$

$C=(-1+1-1+1+1+1-1-1)$

$D=(-1+1-1-1-1-1+1-1)$

$($a$)$

$($c$)$

$S_1*C=\frac{1+1+1+1+1+1+1+1}{8}=1$

$S_2*C=\frac{2+0+0+0+2+2+0+2}{8}=1$

$S_3*C=\frac{0+0+2+2+0-2+0-2}{8}=0$

$S_4*C=\frac{1+1+3+3+1-1+1-1}{8}=1$

$S_5*C=\frac{4+0+2+0+2+0-2+2}{8}=1$

$S_6*C=\frac{2-2+0-2+0-2-4+0}{8}=-1$

$($d$)$

$($a$)$ Chip sequences for four stations. $($b$)$ Signals the sequences represent. $($c$)$ Six

examples of transmissions. $($d$)$ Recovery of station C$\text{'}$s signal.