1 / 5

Revised PHY Proposal

Revised PHY Proposal. Authors:. Date: 2012-05-17. Slide 1. Proposal. The PHY for one TVWS channel (6MHz, 7MHz or 8MHz) is based on the 40MHz 128FFT VHT PHY as defined in clause 22 as-is.

elvina
Télécharger la présentation

Revised PHY Proposal

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Revised PHY Proposal Authors: Date: 2012-05-17 Ron Porat, Broadcom Slide 1

  2. Proposal • The PHY for one TVWS channel (6MHz, 7MHz or 8MHz) is based on the 40MHz 128FFT VHT PHY as defined in clause 22 as-is. • VHT20 is found to be less suitable due to the lower downclocking ratio expected for 8MHz channels (around 3) and the sharp filtering reducing the effective GI length [1][2][3] • Note also that the pre-VHT fields in a VHT 40MHz PHY are duplicated (each one occupying half the channel) • Support for multi-channel coexistence - the pre-VHT fields shall be placed around the middle of each TVWS channel irrespective of the number and location of the channels used for transmission Ron Porat, Broadcom Slide 2

  3. Cont. - Sampling Clock • Having an even integer number of tones defined in a TVWS channel simplifies the spec as all signals are directly mapped to the correct tone location • We propose that the tone spacing for 6MHz TVWS channels equals which translates to a sampling clock of the 128FFT which is easy to generate. • Hence the location of the pre-VHT fields for 2 contiguous channels shall be centered around tones -72 and 72 and with 4 contiguous channels around tones -216, -72, 72, 216 • The sampling clock for 8MHz channels is defined in the same way by having 144tones in 8MHz Ron Porat, Broadcom Slide 3

  4. Motion • Do you support the proposed design in slides 2,3? • Y • N • A Ron Porat, Broadcom Slide 4

  5. [1] 11-11-1544-01-00af-initial-proposal-for-tgaf-phy.pptx [2] 11-12-424-00-00af-tgaf-phy-downclocking.pptx [3] 11-12-0616-00-00af-PHY-proposal.pptx References Ron Porat, Broadcom Slide 5

More Related