<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:p="urn:schemas-microsoft-com:office:powerpoint" xmlns:a="urn:schemas-microsoft-com:office:access" xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:s="uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" xmlns:rs="urn:schemas-microsoft-com:rowset" xmlns:z="#RowsetSchema" xmlns:b="urn:schemas-microsoft-com:office:publisher" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:c="urn:schemas-microsoft-com:office:component:spreadsheet" xmlns:odc="urn:schemas-microsoft-com:office:odc" xmlns:oa="urn:schemas-microsoft-com:office:activation" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:q="http://schemas.xmlsoap.org/soap/envelope/" xmlns:rtc="http://microsoft.com/officenet/conferencing" xmlns:D="DAV:" xmlns:Repl="http://schemas.microsoft.com/repl/" xmlns:mt="http://schemas.microsoft.com/sharepoint/soap/meetings/" xmlns:x2="http://schemas.microsoft.com/office/excel/2003/xml" xmlns:ppda="http://www.passport.com/NameSpace.xsd" xmlns:ois="http://schemas.microsoft.com/sharepoint/soap/ois/" xmlns:dir="http://schemas.microsoft.com/sharepoint/soap/directory/" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:dsp="http://schemas.microsoft.com/sharepoint/dsp" xmlns:udc="http://schemas.microsoft.com/data/udc" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sub="http://schemas.microsoft.com/sharepoint/soap/2002/1/alerts/" xmlns:ec="http://www.w3.org/2001/04/xmlenc#" xmlns:sp="http://schemas.microsoft.com/sharepoint/" xmlns:sps="http://schemas.microsoft.com/sharepoint/soap/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:udcs="http://schemas.microsoft.com/data/udc/soap" xmlns:udcxf="http://schemas.microsoft.com/data/udc/xmlfile" xmlns:udcp2p="http://schemas.microsoft.com/data/udc/parttopart" xmlns:wf="http://schemas.microsoft.com/sharepoint/soap/workflow/" xmlns:dsss="http://schemas.microsoft.com/office/2006/digsig-setup" xmlns:dssi="http://schemas.microsoft.com/office/2006/digsig" xmlns:mdssi="http://schemas.openxmlformats.org/package/2006/digital-signature" xmlns:mver="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns:mrels="http://schemas.openxmlformats.org/package/2006/relationships" xmlns:spwp="http://microsoft.com/sharepoint/webpartpages" xmlns:ex12t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:ex12m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:pptsl="http://schemas.microsoft.com/sharepoint/soap/SlideLibrary/" xmlns:spsl="http://microsoft.com/webservices/SharePointPortalServer/PublishedLinksService" xmlns:Z="urn:schemas-microsoft-com:" xmlns:st="" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p> <o:p></o:p></p>
<p class=MsoNormal align=center style='margin-bottom:10.0pt;text-align:center'><span
style='font-size:16.0pt;font-family:"Calibri","sans-serif"'>An
Information-Theoretic View of MIMO Secret Communication<o:p></o:p></span></p>
<p class=MsoNormal align=center style='margin-bottom:10.0pt;text-align:center'><span
style='font-size:16.0pt;font-family:"Calibri","sans-serif"'>Tie Liu, Texas
A&M University<o:p></o:p></span></p>
<p class=MsoNormal align=center style='margin-bottom:10.0pt;text-align:center'><span
style='font-size:16.0pt;font-family:"Calibri","sans-serif"'>W205 April 30<sup>th</sup>
Friday 11:00am-12:00am<o:p></o:p></span></p>
<p class=MsoNormal align=center style='margin-bottom:10.0pt;text-align:center'><span
style='font-size:16.0pt;font-family:"Calibri","sans-serif"'>Host: Zhu Han and
Wei-Chuan Shih<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:10.0pt;text-align:justify'><span
style='font-family:"Calibri","sans-serif"'>Abstract: Physical layer security
has been an active area of research in recent years. An important physical
layer security technology is via MIMO communications to establish statistical
advantage for the legitimate receiver in certain spatial directions. In this
talk, we take a fundamental view of MIMO secret communication, and present two
precise characterizations of the secrecy capacity of the MIMO Gaussian wiretap
channel. Key to these characterizations is a channel enhancement argument,
which was first used by Weingartein et al. in establishing the private message
capacity region of the MIMO Gaussian broadcast channel. Two important
implications of the secrecy capacity results will be discussed: one on
simultaneously communicating two confidential messages, the other on
simultaneously communicating private and confidential messages.</span><o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:10.0pt;text-align:justify'><span
style='font-family:"Calibri","sans-serif"'>Bio: Tie Liu received his B.S.
(1998) and M.S. (2000) degrees, both in Electrical Engineering, from the
Tsinghua University, Beijing, China and M.S. degree in Mathematics (2004) and
Ph.D. degree in Electrical and Computer Engineering (2006) from the University
of Illinois at Urbana-Champaign. Since August 2006 he has been with the Texas
A&M University, where he is currently an Assistant Professor in Electrical
and Computer Engineering. His research interests are in the field of
information theory, wireless communication, and statistical signal processing.
Prof. Liu is a recipient of the M. E. Van Valkenburg Graduate Research Award
(2006) from the University of Illinois at Urbana-Champaign and the Faculty
Early Career Development (CAREER) Award (2009) from the National Science
Foundation.</span><o:p></o:p></p>
<p> <o:p></o:p></p>
</div>
</body>
</html>