Multipath Distortion
Because radio waves are transmitted in many directions, not all go in a straight
line to every client’s antenna. Some bounce off walls or other objects and arrive
at the client in varying intervals. Thus, the client receives several copies of
the same RF signal, which can cause degraded data quality. This is multipath
distortion, or multipath interference. Diversity systems try to minimize this by
using two antennas; you might try moving antennas or changing the frequency
if this is a problem in your facility. OFDM uses multiple frequencies operating
together to increase performance in multipath situations.