# A 2 Mbps bit stream is to be transmitted using QPSK by multiplexing even- and odd-numbered bits with

A 2 Mbps bit stream is to be transmitted using QPSK by
multiplexing even- and odd-numbered bits with two quadrature carriers in an
AWGN channel.

a. Determine the symbol rate.

b. Determine the required channel bandwidth for NRZ polar
signalling if the output signal is filtered so as to pass only the main lobe of
the signal spectrum.

c. Determine the symbol error probability if the received
carrier power is 100 _W and N0 = 5 _10_12 W/Hz?

d. If one of the quadrature carriers is desired to carry 10
Mbps while the other still supports 1 Mbps, determine the relative amplitudes
of the

A 2 Mbps bit stream is to be transmitted using QPSK by
multiplexing even- and odd-numbered bits with two quadrature carriers in an
AWGN channel.

a. Determine the symbol rate.

b. Determine the required channel bandwidth for NRZ polar
signalling if the output signal is filtered so as to pass only the main lobe of
the signal spectrum.

c. Determine the symbol error probability if the received
carrier power is 100 _W and N0 = 5 _10_12 W/Hz?

d. If one of the quadrature carriers is desired to carry 10
Mbps while the other still supports 1 Mbps, determine the relative amplitudes
of the signals for the two carriers so that the Eb/N0 for the two channels are
the same.

e. Determine the four phases representing the four dibits in
case (d). Are the phase separations the same as when the quadrature carriers
support the same data rate?

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