Space-Time Coding - Siemens RUGGEDCOM WIN5123 User Manual

Chapter 1
Introduction
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Figure 1: MIMO Antenna System
1. MIMO Transmitter with Antenna 2. MIMO Receiver with Antenna
CONTENTS
• Section 1.2.1, "Space-Time Coding"
Section 1.2.1

Space-Time Coding

Space-Time Coding (STC) is a technique for implementing transmission diversity. Mobile WiMAX uses transmit
diversity in the downlink direction to provide spatial diversity to enhance the signal quality to a specific subscriber
located anywhere within the range of the antenna beam. Although providing less signal gain than beam-forming,
transmit diversity is more robust for mobile users as it does not require prior knowledge of the path characteristics
of a subscriber's particular frequency channel. One such STC technique, known as the Alamouti Code, was
published in 1998[4] is incorporated in the WiMAX 16e standard.
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RUGGEDCOM WIN
User Guide
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Space-Time Coding