Madge Networks 802.11b Instrukcja Użytkownika Pobierz pdf (Strona 44)

802.16 Physical Layer

• Operates in the 10-to-66 GHz frequency range.

– 802.16a will operate in the 2-to-11 GHz band

– 802.16b will operate in the 5 GHz ISM band

• Employs three different modulation schemes

– QAM-64, with 6 bits/baud, achieving 150 Mbps

– QAM-16, with 4 bits/baud, achieving 100 Mbps

– QPSK, with 2 bits/baud, achieving 50 Mbps

• The farther from the base, the lower the data rate

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