INTERFERENCE MITIGATION IN IEEE 802.11G OFDM SYSTEMS WITH SMART ANTENNAS AND TAPPED DELAY LINES

摘要

In an 802.11 wireless environment, signals that use Orthogonal Frequency Division Multiplexing (OFDM) and OFDM with Cyclic Prefix Code (OFDM-CPC) present interference to other wireless users. This work thoroughly analyzes the interference these signals cause and contrasts the results to that of narrow band interferers. Smart antennas with tapped-delay-lines are used to mitigate the interference effect from these signals. The optimal values for the delay lines parameters (number of taps and amount of delay provided by each delay unit) to restore the performance at minimum cost are found.