Simple Codes Concept: How Codes Can Be Used 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