Understanding Wireless Technology - LEGRAND Wireless access point Configuration Manual

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/ UNDERSTANDING WIRELESS TECHNOLOGY

Going further with wireless
technology
Channel overlapping
Distribution of channels by
frequency on the 2.4 GHz band.
WiFi technology is radio transmission technology operating
on a frequency band around 2.4 GHz. Within this band,
several channels have been assigned to enable several
close networks to co-exist. On the 2.4 GHz band in France,
13 channels are available.
When two Access points use the same channel to transmit,
they interfere with each other and reduce the data
transmission speed over the radio network. In the 2.4 GHz
band, the channels partially overlap.
Channel 5 will therefore cause strong interference
with channels 4 and 6, much weaker interference (but
nonetheless existent) with channels 3 and 7.
Frequency overlap between channels:
Puissance
11 MHz
Figure 1
1 MHz 11 MHz
5 MHz
25
Fréquence