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Altera_Forum's avatar
Altera_Forum
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14 years ago

IEEE 802.11 a OFDM Pilot tones insertion method ???

Hello,

I am trying to a WLAN baseband processor I am familiar with designs of most of the blocks, but I am facing a problem which is finding a detailed method to combine the 48 subcarriers with pilot tones and zeros, could you please give some advise...

Regards…

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    Pilot subcarriers are scrambled and inserted in -21 -7 & 7 21 locations resepectively of each OFDM subcarrier

    For scrambler Details you can refer to IEEE 802.11a document Figure - 113
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    Thanks kalyansrinivasm,...

    What I meant was how to multiplex the 12 MSps data samples with the 16 MSps Pilot samples (Assuming that the 127 pilot tones with varying polarity are stored in a ROM) before passing the Multiplexed 64 samples (53 samples + 11 zeros ) frame to the IFFT block ???