NDLI: UWB relay with physical layer security enhancement

Content Provider	IEEE Xplore Digital Library
Author	Xie Xianzhong Gou Nan
Copyright Year	2010
Description	Author affiliation: Tennessee Tech University, Cookeville TN, USA (Gou Nan) \|\| Institute of Personal Communication, Chongqing University of Posts and Telecommunications, Chongqing 400065, China (Xie Xianzhong)
Abstract	Motivated by the demand for alternative ways to enhance wireless security, this paper proposes a technique to enhance wireless security at physical layer. It takes advantage of rich multipath environment to focus radio energy on some desired spatial spot, while achieving nulling at other spots. This can be viewed as a physical-layer security enhancement. What makes spatial focusing and nulling possible is transmit waveform optimization based on propagation environments. The concept and principle are studied in an ultra-wideband (UWB) relay network scenario. Using a matched filter receiver at test points, the optimization problem is actually the Quadratically Constrained Quadratic Program (QCQP) which is known as an NP-hard problem, thus the Semidefinite Program (SDP) as a relaxation technique is used to obtain suboptimal results. The feasibility is numerically validated using the UWB outdoor channel model. It is found that, by choosing a proper transmit waveform, the worst-case information leakage at unintended locations can be significantly minimized, with acceptable attenuation at the intended location.
Starting Page	1
Ending Page	4
File Size	117080
Page Count	4
File Format	PDF
ISBN	9781424453054
e-ISBN	9781424453061
DOI	10.1109/ICUWB.2010.5615633
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	UWB relay network QCQP Transmitting antennas Receivers Security Relays physical-layer security Optimization Gain SDP Signal to noise ratio
Content Type	Text
Resource Type	Article

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