Interactive end-of-chapter exercises


CDMA - Basic

Imagine a scenario where a sender and receiver using CDMA (Section 7.2.1 from the text) are exchanging data. Assume both the sender and receiver use a CDMA code of size 8, where M = -1, 1, -1, -1, -1, 1, 1, 1.



Question List


1. Given the CDMA code above and the bit d=1, what is the encoded output? Separate each value with a comma and no spaces

2. Given the CDMA code above and the output string: 1,-1,1,1,1,-1,-1,-1, what is the decoded bit value?




Solution


1. The encoded output is: -1,1,-1,-1,-1,1,1,1

2. The original bit value is: -1



That's incorrect

That's correct

The answer was: -1,1,-1,-1,-1,1,1,1

Question 1 of 2

The answer was: -1

Question 2 of 2

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We greatly appreciate the work of John Broderick (UMass '21) in helping to develop these interactive problems.

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