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Digital Signal Processing 101, 2nd Edition by Michael Parker

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Chapter 16

CDMA Wireless Communications

Abstract

This chapter explains the basics of code division multiple access (CDMA) wireless communication. A common nontechnical analogy to CDMA is the following. Imagine a round table, where there are multiple one-to-one conversations occurring between various pairs of people who are not adjacent to each other. Each pair would hear the other pairs' conversations as unintelligible noise, and their own conversation would stand out because each person could correlate what he heard against familiar words and speech of his own language. Similarly, CDMA systems use codes to separate signals that share the same frequency and are transmitted simultaneously. The receiver is able to use a structure called a RAKE receiver ...

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