QUESTION 9 How many different phases would a 16-PSK modulated signal with the fo

Question

QUESTION 9 How many different phases would a 16-PSK modulated signal with the following constellation diagram have? 1.5 0100 0011 0101 0010 0110 0001 0.5 0111 1000 0.5 1001 1110 1010 1101 1011 1100 .5 0.5 0.5 In-Phase 65,536 o 16 QUESTION 10 A polar NRZ baseband signal is modulated using a 4-PSK (QPSK) modulation scheme This modulated signal is observed to have a transmission bandwidth of w = 150 MHz If this same signal was instead modulated using 16-PSK what would the transmission bandwidth be? W-150 MHz W = 75 MHz ·w = 300 MHz W = 1.6 GHz W-1.2 GHz W=600 MHz

Explanation / Answer

1) each symbol has 4 bits (for 16-psk)

n= 4 bits

24 = 16 different phases are used to modulate the signal

2) for 4-psk

W=150 MHz =Rb

Band Width = 2Rb/log16

=2(150 MHz)/4

W = 75 MHz

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