1 / 7

Enhancing 1 MHz STF Design for Improved Timing Acquisition in 802.11ah

This document discusses the shortcomings of the current 1 MHz Short Training Field (STF) design in 802.11ah, focusing on issues related to signal correlation and timing acquisition. It highlights that the current STF performs poorly compared to the 2 MHz STF, exhibiting weak correlation properties despite a 3 dB power boost for MCS0-Rep2. Recommendations are made for further discussions and developments to either improve the existing STF or create a new one with correlation characteristics similar to those of the 2 MHz STF.

hoang
Télécharger la présentation

Enhancing 1 MHz STF Design for Improved Timing Acquisition in 802.11ah

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. ` 1 MHz STF Issues Authors: • Date:2012-03-12 InterDigital Communications

  2. Abstract • This document highlights issues with the current 1 MHz STF design and recommends discussion/work to improve the signal to enable better coarse timing acquisition. InterDigital Communications

  3. 802.11 ah preamble specification for 1 MHz • STF Sequence: • Tone Index: [-12 -8 -4 4 8 12]: 5 repetitions in 1 OFDM symbol. • Values: [0.5 -1 1 -1 -1 0.5]*(1 + i) • 3 dB power boost only for MCS0-Rep2 • Low PAPR: 0.46 dB InterDigital Communications

  4. Correlation of 2 MHz STF • STF correlation has >10 dB difference between peaks and next highest value InterDigital Communications

  5. Correlation of Current 1 MHz STF • Proposed STF has worse correlation than 2 MHz STF: will perform poorly even with 3 dB power boost. InterDigital Communications

  6. Conclusions • Current 1 MHz STF issues: • Poor correlation properties compared to existing structures. • Unnecessarily complex (3 dB boost, reduced shoulders to reduce PAPR). InterDigital Communications

  7. Straw Poll • Consider re-work of current STF or a new STF that has correlation properties similar in performance to the 2 MHz STF. InterDigital Communications

More Related