Novel carrier frequency offset mitigation in IEEE802.11a/g/n systems

Hsin Chang Wu, I. Tai Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The newly balloted IEEE 802.11n standard uses both orthogonal frequency division modulation (OFDM) and multi-input multi-output (MIMO) techniques. A requirement of the new standard is backward compatibility to legacy 802.11a/g systems through the use of legacy preambles. Taking advantage of pilots in the legacy signal field (L-SIG), and in the newly added high throughput (HT) signal fields (HT-SIG), a novel carrier frequency offset (CFO) mitigation scheme is developed. With the maximum CFO (40 ppm) requirement specified by the standard the proposed scheme provides more than 3 dB gains than conventional methods to yield a less than 1 kHz residue CFO. Simulation results also show that the performance degradation due to residual CFO is within 1.5 dB for various TGn channels modulation and coding schemes, transmit antenna excitationschemes and OFDM MIMO transceiver configurations.

Original languageEnglish (US)
Title of host publication2009 IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2009
DOIs
StatePublished - Sep 25 2009
Event2009 IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2009 - Cairo, Egypt
Duration: Apr 28 2009Apr 30 2009

Publication series

Name2009 IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2009

Other

Other2009 IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2009
CountryEgypt
CityCairo
Period4/28/094/30/09

Keywords

  • Carrier frequency offset (CFO)
  • IEEE 802.11a/g/n
  • MIMO
  • OFDM
  • SNR

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Information Systems
  • Electrical and Electronic Engineering
  • Communication

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  • Cite this

    Wu, H. C., & Lu, I. T. (2009). Novel carrier frequency offset mitigation in IEEE802.11a/g/n systems. In 2009 IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2009 [5010569] (2009 IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2009). https://doi.org/10.1109/WOCN.2009.5010569