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    Part V: Appendixes > Chapter 6

    Chapter 6

    1:

    Table 6-2. The 802.11 Protocol
    Ratified1997
    RF TechnologyFHSS and DSSS
    Frequency Spectrum2.4 GHz


    2:

    Table 6-3. The 802.11b Protocol
    Ratified1999
    RF TechnologyDSSS
    Frequency Spectrum2.4-GHz
    CodingBarker 11 and CCK
    ModulationDBPSK and DQPSK
    Data Rates1, 2, 5.5, 11 Mbps
    Nonoverlapping Channels1, 6, 11


    3:

    Table 6-4. The 802.11g Protocol
    RatifiedJune 2003
    RF TechnologyDSSS and OFDM
    Frequency Spectrum2.4 GHz
    CodingBarker 11 and CCK
    ModulationDBPSK and DQPSK
    Data Rates1, 2, 5.5, 11 Mbps with DSSS
     6, 9, 12, 18, 24, 36, 48, 54 Mbps with OFDM
    Nonoverlapping Channels1, 6, 11


    4:

    Table 6-5. The 802.11a Protocol
    Ratified1999
    RF TechnologyOFDM
    Frequency Spectrum5.0 GHz
    CodingConvolution Coding[*]
    ModulationBPSK, QPSK, 16-QAM, 64-QAM depending on the subcarrier.
    Data Rates6, 9, 12, 18, 24, 36, 48, 54 Mbps with OFDM
    Nonoverlapping ChannelsEach band has 4; the middle 8 are used with 52 subcarriers on each channel


    [*] Convolution coding is a form of error correction in which redundant information analogous to a parity bit in a file system is added to the data. The error correction is calculated across all the subcarriers, so if narrowband interference corrupts data on one subcarrier, the receiver can reconstruct that data using the convolution coding on another subcarrier.1

    5:

    Table 6-6. The UNII Frequency Bands
    BandFrequencyUse
    UNII-15.15–5.25 GHz (UNII Indoor)FCC allows indoor and outdoor use.
    UNII-25.25–5.35 GHz (UNII Low)Outdoor/indoor with DFS and TPC
    UNII-35.725–5.825 GHz (U-NII/ISM)FCC allows indoor and outdoor use.
      ETSI does not allow unlicensed use.


    6:

    Table 6-7. FCC Regulations on Output and EIRP for UNII
    BandOutput Power Not to ExceedEIRP Maximum
    UNII-150 mW22 dBm
    UNII-2250 mW29 dBm
    UNII-2 Extended1 W36 dBm
    UNII-31W36 dBm


    7:

    Table 6-8. ETSI Regulations on Output and EIRP for UNII
    BandOutput Power Not to ExceedEIRP Maximum
    UNII-1200 mW23 dBm
    UNII-2200 mW23 dBm
    UNII-2 Extended1 W30 dBm
    UNII-3Licensed use only—



      

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