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 |
Let us consider the following steps or activities at a given transmitter location:
| Step 1 | | An arbitrary data sequence di(t) generated by a digital source. |
| Step 2 | | Now generate an arbitrary Code sequence ci(t). |
| Step 3 | | Add these two sequences Modulo-2 (Exclusive-OR gate) as shown in step 3 above. |
CODE: AN INTRODUCTION
By Dr. Ernest Simo
© 1999 DR. ERNEST SIMO - SPACE2000