PHY-Layer Resiliency in OFDM Communications: A Tutorial

This tutorial paper addresses the physical layer security concerns and resiliency of Orthogonal Frequency Division Multiplexing (OFDM) communications; the de facto air-interface of most modern wireless broadband standards including 3GPP Long Term Evolution (LTE) and WiMAX. The paper starts with a br...

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Bibliographic Details
Published in:IEEE Communications surveys and tutorials 2015, Vol.17 (1), p.292-314
Main Authors: Shahriar, Chowdhury, La Pan, Matt, Lichtman, Marc, Clancy, T. Charles, McGwier, Robert, Tandon, Ravi, Sodagari, Shabnam, Reed, Jeffrey H.
Format: Article
Language:English
Subjects:
Broadband communication
Channel estimation
Communication system security
Construction
Jamming
Noise
OFDM
Orthogonal Frequency Division Multiplexing
Synchronization
Tutorials
Waveforms
Wireless communication
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Summary:This tutorial paper addresses the physical layer security concerns and resiliency of Orthogonal Frequency Division Multiplexing (OFDM) communications; the de facto air-interface of most modern wireless broadband standards including 3GPP Long Term Evolution (LTE) and WiMAX. The paper starts with a brief introduction to the OFDM waveform and then reviews the robustness of the existing OFDM waveform in the presence of noise, multipath fading, and interference. The paper then moves on to build comprehensive adversarial models against OFDM waveforms. Robustness of OFDM is first investigated under AWGN noise and noise-like jamming attack scenarios, then under uncorrelated yet colored interferences from modulated sources (both intentional and unintentional). Finally, the paper explores some of the more recent developments in the field of energy efficient correlated jamming attacks that can disrupt communication severely by exploiting the knowledge of the target waveform structure. Potential countermeasures against such jamming attacks are presented, in an attempt to make a robust and resilient OFDM waveform.
ISSN:1553-877X
2373-745X
DOI:10.1109/COMST.2014.2349883