8
OFDM and Spatial Diversity
8.1 Introduction
In this chapter, we discuss the Orthogonal Frequency Division Multiplexing (OFDM) and Spatial Diversity techniques. Note that OFDM is one of the most recent and advanced techniques used in wireless mobile communications. OFDM is a Frequency Division Multiplexing (FDM) modulation technique for transmitting large amounts of digital data over a radio wave. OFDM works by splitting the radio signal into multiple smaller subsignals that are then transmitted simultaneously at different frequencies to the receiver. OFDM reduces the amount of crosstalk in signal transmissions. 802.11a WLAN, 802.16, and WiMAX technologies use OFDM.
The 4G cellular technology standard Long-Term Evolution (LTE) uses ...
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