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Line coding 1011001010 (polar NRZ, polar RZ, Manchester, AMI)
Short answer
Polar NRZ: + - + + - - + - + -. Polar RZ: +0 -0 +0 +0 -0 -0 +0 -0 +0 -0. Manchester: +- -+ +- +- -+ -+ +- -+ +- -+. AMI: + 0 - + 0 0 - 0 + 0 (1s alternate).
Given the binary sequence 1011001010 represent it in Polar NRZ, Polar RZ, Manchester and AMI codes.
Bit sequence: 1 0 1 1 0 0 1 0 1 0, bit period , levels . Each bit is 4 characters wide in the drawings.
Conventions used: Manchester sends 1 as a +V half followed by a −V half, and 0 as −V then +V (Lathi/Haykin; the IEEE 802.3 convention is the opposite). AMI sends alternate 1s as half-width +V and −V pulses, starting with +V, and 0 as no pulse.
Polar NRZ (1 → +V, 0 → −V, full bit)
1 0 1 1 0 0 1 0 1 0
+V ────| |───────| |───| |───|
-V |───| |───────| |───| |───
Polar RZ (1 → +V, 0 → −V, for half bit, then 0)
1 0 1 1 0 0 1 0 1 0
+V ──| |─| |─| |─| |─|
0 |─| |─| |─| |─| |─| |─| |─| |─| |─| |─
-V |─| |─| |─| |─| |─|
Manchester
1 0 1 1 0 0 1 0 1 0
+V ──| |───| |─| |─| |───| |───| |─
-V |───| |─| |───| |─| |───| |───|
AMI (bipolar RZ)
1 0 1 1 0 0 1 0 1 0
+V ──| |─| |─|
0 |─────| |─| |─────────| |─────| |─────
-V |─| |─|
AMI pulse polarities for the 1s: + − + − + (the 0s are 0).
✓ Answer checked by Claude Opus 5.5 (high effort)
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