Wireless Oom

1. Binary XOR operation allows the original symbol reconstruction.
Do spread:
symbol sequence X  (XOR) some code Y => some signal Z
Do despread:
some signal Z (XOR) some code Y => symbol sequence X

—————
2. Let’s assume there are 10 users who want to send its data X1, X2, …, X10.
Let’s assume they have their own codes Y1, Y2, [...]