Binary signal, Uni-polar,

3,330 views

Published on

Published in: Education, Technology
0 Comments
3 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
3,330
On SlideShare
0
From Embeds
0
Number of Embeds
3
Actions
Shares
0
Downloads
35
Comments
0
Likes
3
Embeds 0
No embeds

No notes for slide

Binary signal, Uni-polar,

  1. 1. <ul><li>Binary </li></ul><ul><li>Signals </li></ul><ul><li>Tayyab Arif </li></ul><ul><li>Allama Iqbal Open University </li></ul><ul><li>Islamabad </li></ul><ul><li>Mob: 03445064252 </li></ul><ul><li>Email: leopk01@yahoo.com </li></ul>
  2. 2. Binary Signals <ul><li>4.5.1 Representation of Binary Sequences: </li></ul><ul><ul><li>Uni-polar </li></ul></ul><ul><ul><li>Bipolar </li></ul></ul><ul><ul><li>Return-to-Zero </li></ul></ul><ul><ul><li>Bi-phase or Manchester </li></ul></ul><ul><ul><li>Alternate mark inversion (AMI) </li></ul></ul>
  3. 3. Binary Signals <ul><li>Unipolar: </li></ul><ul><ul><li>For 1s Positive Current Flows. </li></ul></ul><ul><ul><li>For 0s no current flows. </li></ul></ul><ul><ul><li>Requires most power. </li></ul></ul>
  4. 4. 00110101 Unipolar encoding Time Amplitude 0 0 0 0 1 1 1 1
  5. 5. Binary Signals <ul><li>Bipolar: </li></ul><ul><ul><li>For 1s positive Current flows. </li></ul></ul><ul><ul><li>For 0s negative Current flows. </li></ul></ul><ul><ul><li>Most used in electric Circuits. </li></ul></ul>
  6. 6. 00110101 Bipolar encoding Time Amplitude 0 0 0 0 1 1 1 1
  7. 7. Binary Signals <ul><li>Return-to-zero: </li></ul><ul><ul><li>Bits are represented by a positive or a negative current pulse that is one half the width of bipolar signals. </li></ul></ul><ul><ul><li>The current level returns to zero before thenext bit in the sequence is handled. </li></ul></ul>
  8. 8. 00110101 Polar encoding – Return to Zero: RZ Time Amplitude 0 0 0 0 1 1 1 1
  9. 9. Binary Signals <ul><li>Biphase or Manchester: </li></ul><ul><ul><li>A 1 is a positive current that changes to a negative current. </li></ul></ul><ul><ul><li>A 0 is a negative current that changes to a positive current. </li></ul></ul><ul><ul><li>Changeover occur exactly at the middle of the bit period. </li></ul></ul><ul><ul><li>Reduces the chance for error. </li></ul></ul>
  10. 10. 00110101 Polar encoding – Biphase - Manchester Time Amplitude 0 0 0 0 1 1 1 1
  11. 11. 00110101 Polar encoding – Biphase - Manchester Time Amplitude 0 0 0 0 1 1 1 1 0 1
  12. 12. Binary Signals <ul><li>Alternate mark inversion (AMI): </li></ul><ul><ul><li>1s are represented by return-to-zero pulses that alternate between positive and negative levels. </li></ul></ul><ul><ul><li>0s are represented by the absence of puses. </li></ul></ul>
  13. 13. 00110101 Bipolar encoding – AMI (alternate mark inversion) Time Amplitude 0 0 0 0 1 1 1 1
  14. 14. <ul><li>Tayyab Arif </li></ul><ul><li>Allama Iqbal Open University </li></ul><ul><li>Islamabad </li></ul><ul><li>Mob: 03445064252 </li></ul><ul><li>Email: leopk01@yahoo.com </li></ul><ul><li>Ref: Telecommunication Primer Signals, Building Blocks and networks by E.Bryan </li></ul>

×