Evaluation of interference between MB-OFDM UWB and wireless LAN systems using a GTEM cell

In this study, an electromagnetic interference of an MB-OFDM UWB system with an IEEE802.11a wireless LAN was evaluated using a GTEM cell. Band #3 (out-of-band radiation for 11a) in the band plan of the MB-OFDM UWB system and Band #4 (in-band radiation for 11a) were assumed to be two different types of interference. As a result, when the frequencies of the MB-OFDM UWB corresponded to Band#3, MB-OFDM UWB system did not interfere with the wireless LAN. In the other band, although the interference power of the MB-OFDM UWB was less than the receiver noise, the MB-OFDM UWB system interfered with the wireless LAN. In addition, the separation distance was evaluated from the power inputted to the GTEM cell. As a result, for the vicinity of the minimum receiver sensitivity of the wireless LAN, the separation distance was about 3 m.