Changes between Version 11 and Version 12 of 802.11/PHY


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Timestamp:
Dec 2, 2013, 4:57:23 AM (10 years ago)
Author:
murphpo
Comment:

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  • 802.11/PHY

    v11 v12  
    4343||  64-QAM  ||  3/4  ||  54  ||
    4444
     45== Receiver ==
     46
     47The architecture of the PHY receiver is illustrated below.
     48
     49[[Image(wiki:802.11/files:wlan_phy_rx_blk_diag.png)]]
     50
     51 * Packet Detection:
     52 * Antenna Selection:
     53 * LTS Correlation:
     54 * Synchronization:
     55 * CFO Correction:
     56 * FFT:
     57 * Phase Error Estimation:
     58 * Channel Estimation:
     59 * Equalization:
     60 * Soft Demod:
     61 * De-Interleaving:
     62 * Decoding:
     63 * Descrambling:
     64
    4565'''DSSS:''' The PHY receiver also implements the 1Mbps DSSS rate specified in the original 802.11 standard (section 16.2 of the 802.11-2012 standard). This receiver allows reception of management frames transmitted by 802.11 devices at 1Mbps. These transmissions are common in deployments of 802.11 hardware at 2.4GHz. For example, Beacon and Probe Request frames are frequently transmitted at 1Mbps by commercial devices. The basic STA/AP association handshake requires reception of these frames. The 802.11 Reference Design does not implement a DSSS transmitter, as modern 802.11 devices are able to receive management frames at higher rates (including 6Mbps, the lowest OFDM rate, which is commonly used for management frames at 5GHz).
    4666