Turbo Interleaving inside the cdma2000 and W-CDMA Mobile Communication Systems: A Tutorial

TL;DR

This tutorial explains the detailed operation, differences, and analysis of turbo interleavers in cdma2000 and W-CDMA standards, illustrating their processes with examples relevant to mobile communication systems.

Contribution

It provides a comprehensive comparison and analysis of turbo interleavers used in major 3G standards, including dispersion and frequency analysis, with illustrative examples.

Findings

Differences in interleaver approaches for cdma2000 and W-CDMA

Dispersion and frequency analysis of turbo interleavers

Examples illustrating the interleaving process

Abstract

In this paper a discussion of the detailed operation of the interleavers used by the turbo codes defined on the telecommunications standards cdma2000 (3GPP2 C.S0024-B V2.0) and W-CDMA (3GPP TS 25.212 V7.4.0) is presented. Differences in the approach used by each turbo interleaver as well as dispersion analysis and frequency analysis are also discussed. Two examples are presented to illustrate the complete interleaving process defined by each standard. These two interleaving approaches are also representative for other communications standards.