Diversity techniques are methods used to enhance the reliability of communication by exploiting the fact that the communication channel often produces multiple copies of the same information in different waveforms. A typical example of such a channel is a multipath channel, where the signal from the transmitter travels to the receiver along different paths. Diversity is particularly useful in combating the effects of fading on communication reliability. This chapter provides an overview of the phenomena of fading and multipath, followed by diversity techniques.
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