Simple Codes Concept:
How Codes Can Be Used
| Step - 1 | di(t) | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 1 |
| Step - 2 | ci(t) | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 |
| Step - 3 | di(t)+ci(t) | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 1 |
| Step - 4 | di(t)+ci(t) | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 1 | Step - 5 | ci(t) | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 |
| Step - 6 | di(t)+ci(t)+ci(t)=di(t) | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 1 |
| Step 4 | | At the distant location, the resulting sequence is picked up by the receiver: |
| Step 5 | | If the code ci(t) used at the transmitting location is available at the receiver, then the original data sequence di(t) can be recovered exactly. |
| Step 6 | | This is done by Modulo-2 adding the received sequence with the locally available code ci(t). |
CODE: AN INTRODUCTION
By Dr. Ernest Simo
© 1999 DR. ERNEST SIMO - SPACE2000