Hence, for a 10% outage probability, the MIMO throughput is
more than 8 times better in this particular case. For the 1% outage probability, the
performance difference is even more pronounced.
The 802.11n MIMO-OFDM Standard 190
Figure 8.11: Percentage of Access points seen in a particular 2.4 GHz channel, based on 1722
measured Access Points in cities in the Netherlands, Belgium, and Italy.
Figure 8.13 shows measured TCP/IP throughput results for both 20 and 40 MHz
channel width. Each throughput curve consists of 8 points that correspond to different
locations of the client inside a house, with an increased range towards the access point, but
also with an increasing number of walls between the client and the access point. For the
first test point, the client device is in the same room as the access point at a distance of 17
feet, while at the last test point the distance is 102 feet including 5 walls in between client
and access point. The results show that for any range, the MIMO-OFDM throughput is 2.5
to 5 times larger than the throughput of non-MIMO products. Notice that several of these
other products use channelbonding to provide a proprietary maximum raw data rate of 108
Mbps in a 40 MHz channel.
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