Making carrier frequency offset an advantage for orthogonal frequency division multiplexing

Xiaojing Huang*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

Contrary to the common belief that the carrier frequency offset (CFO) in an orthogonal frequency division multiplexing (OFDM) system would adversely impact on system performance, this paper shows that the CFO actually has the effect of linear precoding among transmitted data symbols and hence can be exploited to improve the diversity performance over frequency-selective fading channels. With both analysis and Monte Carlo simulation, it is proved that an OFDM system with CFO equal to half of the subcarrier spacing can potentially achieve the performance of diversity order four by the maximum-likelihood detection and demonstrate a 5 dB improvement using the minimum mean squared error equalization.

Original languageEnglish
Title of host publication3rd International Conference on Communications and Networking in China, ChinaCom 2008
Pages854-858
Number of pages5
DOIs
Publication statusPublished - 2008
Event3rd International Conference on Communications and Networking in China, ChinaCom 2008 - Hangzhou, China
Duration: 25 Aug 200827 Aug 2008

Other

Other3rd International Conference on Communications and Networking in China, ChinaCom 2008
CountryChina
CityHangzhou
Period25/08/0827/08/08

Keywords

  • Carrier frequency offset (CFO)
  • Frequency-selective fading
  • Linear precoding
  • Multipath diversity
  • Orthogonal frequency division multiplexing (OFDM)

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