Question

The unipolar non-return-to-zero (NRZ) line code and the differential Manchester code are illustrated in Fig. Q3. Both line codes are transmitted at rate 10 kbps over an additive white Gaussian noise (AWGN) channel with single-sided power spectral density $N_0 = 1.25 \times 10^{-5}$ W/Hz. The amplitude of the unipolar NRZ signal varies between 0 and 2 V, while the amplitude of the differential Manchester code varies between -1 V and 1 V. Assume that 0 and 1 have equal probability of occurrence in a long bit sequence. Clock Unipolar NRZ Differential Manchester Code 1 0 1 0 0 1 1 1 0 0 1 Fig. Q3: Line codes a) i) Calculate the bandwidth of the unipolar NRZ line code. Sketch the signal constellation diagram for the unipolar NRZ line code.

          The unipolar non-return-to-zero (NRZ) line code and the differential Manchester
code are illustrated in Fig. Q3. Both line codes are transmitted at rate 10 kbps over
an additive white Gaussian noise (AWGN) channel with single-sided power
spectral density $N_0 = 1.25 \times 10^{-5}$ W/Hz. The amplitude of the unipolar NRZ signal
varies between 0 and 2 V, while the amplitude of the differential Manchester code
varies between -1 V and 1 V. Assume that 0 and 1 have equal probability of
occurrence in a long bit sequence.
Clock
Unipolar NRZ
Differential
Manchester
Code
1 0 1 0 0 1 1 1 0 0 1
Fig. Q3: Line codes
a) i) Calculate the bandwidth of the unipolar NRZ line code. Sketch the signal
constellation diagram for the unipolar NRZ line code.

The unipolar non-return-to-zero (NRZ) line code and the differential Manchester
code are illustrated in Fig. Q3. Both line codes are transmitted at rate 10 kbps over
an additive white Gaussian noise (AWGN) channel with single-sided power
spectral density N0 = 1.25 × 10^-5 W/Hz. The amplitude of the unipolar NRZ signal
varies between 0 and 2 V, while the amplitude of the differential Manchester code
varies between -1 V and 1 V. Assume that 0 and 1 have equal probability of
occurrence in a long bit sequence.
Clock
Unipolar NRZ
Differential
Manchester
Code
1 0 1 0 0 1 1 1 0 0 1
Fig. Q3: Line codes
a) i) Calculate the bandwidth of the unipolar NRZ line code. Sketch the signal
constellation diagram for the unipolar NRZ line code.

Added by Kevin R.

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