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- 2081 Bhadra (CS II) · 1.5+1.5+1.5+1.5 marks
Line coding 1001101101 (unipolar NRZ, polar RZ, AMI, Manchester)
Short answer
For 1001101101: Unipolar NRZ: 1→+V full bit, 0→0 V. Polar RZ: 1→+V half-bit then 0, 0→-V half-bit then 0. AMI: 0→0 V, 1s alternate +V,-V starting +V. Manchester: 1→+V then -V, 0→-V then +V, with mid-bit transition.
Represent given binary sequence 1001101101 in unipolar NRZ, polar RZ, AMI, and Manchester codes.
Bit sequence: 1 0 0 1 1 0 1 1 0 1, bit period , levels .
Unipolar NRZ
1 → +V for the full bit, 0 → 0 V.
Unipolar NRZ
1 0 0 1 1 0 1 1 0 1
+V ────| |───────| |───────| |───
0 |───────| |───| |───|
Polar RZ
1 → +V for half the bit, 0 → −V for half the bit, then 0.
Polar RZ
1 0 0 1 1 0 1 1 0 1
+V ──| |─| |─| |─| |─| |─|
0 |─| |─| |─| |─| |─| |─| |─| |─| |─| |─
-V |─| |─| |─| |─|
AMI
0 → 0 V. The 1s are half-width pulses of alternating polarity: + − + − + −.
AMI (RZ)
1 0 0 1 1 0 1 1 0 1
+V ──| |─| |─|
0 |─────────| |─| |─────| |─| |─────| |─
-V |─| |─| |─|
Manchester
1 → +V then −V, 0 → −V then +V. There is a transition at every mid-bit.
Manchester
1 0 0 1 1 0 1 1 0 1
+V ──| |─| |───| |─| |───| |─| |───|
-V |───| |─| |─| |───| |─| |───| |─
✓ Answer checked by Claude Opus 5.5 (high effort)
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