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Ultra-Wideband Communications: Fundamentals and Applications by Faranak Nekoogar

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4.2. Interference Effects on IEEE 802.11a/b WLANs

In this section, we consider the specific performance degradations to IEEE 802.11a/b systems resulting from UWB interference. The IEEE 802.11a and 802.11b standards are specifications for wireless local area networks. Devices conforming to the 802.11a standard transmit data using OFDM modulation in the unlicensed 5 GHz band (the so-called Unlicensed National Information Infrastructure, or U-NII). These devices are capable of transmitting data at up to 54 Mbps for distances up to 30 meters. The high operating frequency limits the penetration properties of such devices, and as a result their range is also restricted to short distances. In contrast, 802.11b WLAN systems (also known as Wi-Fi devices) ...

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