Wi-Fi Array
74 Installing the Wi-Fi Array
Figure 23. MIMO Signal Processing
MIMO signal processing uses multiple antennas to send and receive data. It takes
advantage of multipath reflections to improve signal coherence and greatly
increase receiver sensitivity (Figure 23). Multipath signals were considered to be
interference by 802.11a/b/g radios, and degraded performance. In 802.11n, these
signals are used to enhance performance. This extra sensitivity can be used for
greater range or higher data rates. The enhanced signal is the processed sum of
individual antennas. Signal processing eliminates nulls and fading that any one
antenna would see. MIMO signal processing is sophisticated enough to discern
multiple spatial streams (see Multiple Data Streams — Spatial Multiplexing).
There are no settings to configure for MIMO.
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