Question

a. Assume that the transmitted bit stream for DPSK, b(t) is the binary equivalent of your last 4 digit of your id number. Obtain the original data stream d(t). Represent all the bit streams as waveforms. (10 Marks) (Note: Convert your student ID from its decimal (base 10) representation into binary (base 2) representation (6728) For example if the student id is 16F42657, then the corresponding binary is 657-1010010001)

Answer 1

As the circuit diagram for DPSK scheme is given by a XOR circuit, the circuit below is drawn.

The circuit diagram 6(+) det) T(d) Given, bet)= (6728) 0 = 10 (1101001001000), obtain act) from bit) $(t) = bects b (t-Td), Casel! Taking initial bit of delay bit is. bct) 1 1 0 TOO TOOI OOO blt-Td) 0 1 0 1 0 0 1 0 1 dCt)= 0111011011 OO cases - Taking initial bit of delay biti .. bit) - O - OOO - 1 -- 0 bet-Ta / - 0 1 0 0 11 00 (* 011101101100) det) from Casel & Caser - det) = wave form representation - БОХ) 0 1 O D O 1 bt-Td) ܦܐ det) Portal 1 010

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