Question: There are four stations communicating using CDMA (code division multiple access). The code assigned to each station is as follow: A: ( +1 +1 +1

There are four stations communicating using CDMA (code division multiple access).

The code assigned to each station is as follow:

A: ( +1 +1 +1 +1)

B: ( +1 +1 -1 -1)

C: ( +1 -1 -1 +1)

D: ( +1 -1 +1 -1)

Given the 4-bit messages sent by A, B, C, D are (1101) ₂, (0101) ₂, (1101) ₂, (1001) ₂, respectively. Derive the overall signal delivered in the channel. Show the steps you derive the answer.

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