P$5-8.$ The telephone line has $4$ KHz bandwidth. What is the maximum number of

bits we can send using each of the following techniques? Let d $=0.$

a$.$ ASK b$.$ QPSK c$.16-$QAM d$.64-$QAM

P$5-9.$ A corporation has a medium with a $1-$MHz bandwidth $($lowpass$).$ The corpo$-$

ration needs to create $10$ separate independent channels each capable of send$-$

ing at least $10$ Mbps$.$ The company has decided to use QAM technology. What

is the minimum number of bits per baud for each channel? What is the number

of points in the constellation diagram for each channel? Let d $=0.$

P$5-10.$ A cable company uses one of the cable TV channels $($with a bandwidth of

$6$ MHz$)$ to provide digital communication for each resident. What is the avail$-$

able data rate for each resident if the company uses a $64-$QAM technique?

P$5-11.$ Find the bandwidth for the following situations if we need to modulate a

$5-$KHz voice.

a$.$ AM b$.$ FM $($ $=5)$ c$.$ PM $($ $=1)$

P$5-12.$ Find the total number of channels in the corresponding band allocated by

FCC$.$

a$.$ AM b$.$ FM