Equivalent system model and equalization of differential impulse radio UWB systems
A discrete-time equivalent system model is derived for differential and transmitted reference (TR) ultra-wideband (UWB) impulse radio (IR) systems, operating under heavy intersymbol-interference (ISI) caused by multipath propagation. In the systems discussed, data is transmitted using differential m...
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| Veröffentlicht in: | IEEE journal on selected areas in communications 2005-09, Vol.23 (9), p.1851-1862 |
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| container_title | IEEE journal on selected areas in communications |
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| creator | Witrisal, K. Leus, G. Pausini, M. Krall, C. |
| description | A discrete-time equivalent system model is derived for differential and transmitted reference (TR) ultra-wideband (UWB) impulse radio (IR) systems, operating under heavy intersymbol-interference (ISI) caused by multipath propagation. In the systems discussed, data is transmitted using differential modulation on a frame-level, i.e., among UWB pulses. Multiple pulses (frames) are used to convey a single bit. Time hopping and amplitude codes are applied for multi user communications, employing a receiver front-end that consists of a bank of pulse-pair correlators. It is shown that these UWB systems are accurately modeled by second-order discrete-time Volterra systems. This proposed nonlinear equivalent system model is the basis for developing optimal and suboptimal receivers for differential UWB communications systems under ISI. As an example, we describe a maximum likelihood sequence detector with decision feedback, to be applied at the output of the receiver front-end sampled at symbol rate, and an adaptive inverse modeling equalizer. Both methods significantly increase the robustness in presence of multipath interference at tractable complexity. |
| doi_str_mv | 10.1109/JSAC.2005.853876 |
| format | Article |
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In the systems discussed, data is transmitted using differential modulation on a frame-level, i.e., among UWB pulses. Multiple pulses (frames) are used to convey a single bit. Time hopping and amplitude codes are applied for multi user communications, employing a receiver front-end that consists of a bank of pulse-pair correlators. It is shown that these UWB systems are accurately modeled by second-order discrete-time Volterra systems. This proposed nonlinear equivalent system model is the basis for developing optimal and suboptimal receivers for differential UWB communications systems under ISI. As an example, we describe a maximum likelihood sequence detector with decision feedback, to be applied at the output of the receiver front-end sampled at symbol rate, and an adaptive inverse modeling equalizer. 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(IEEE) 2005</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c353t-2c80270c0c0e242cc40f0867515f218fe3dbb04d5767ead1240645c55002c7483</citedby><cites>FETCH-LOGICAL-c353t-2c80270c0c0e242cc40f0867515f218fe3dbb04d5767ead1240645c55002c7483</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/1504918$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,780,784,796,27924,27925,54758</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/1504918$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Witrisal, K.</creatorcontrib><creatorcontrib>Leus, G.</creatorcontrib><creatorcontrib>Pausini, M.</creatorcontrib><creatorcontrib>Krall, C.</creatorcontrib><title>Equivalent system model and equalization of differential impulse radio UWB systems</title><title>IEEE journal on selected areas in communications</title><addtitle>J-SAC</addtitle><description>A discrete-time equivalent system model is derived for differential and transmitted reference (TR) ultra-wideband (UWB) impulse radio (IR) systems, operating under heavy intersymbol-interference (ISI) caused by multipath propagation. In the systems discussed, data is transmitted using differential modulation on a frame-level, i.e., among UWB pulses. Multiple pulses (frames) are used to convey a single bit. Time hopping and amplitude codes are applied for multi user communications, employing a receiver front-end that consists of a bank of pulse-pair correlators. It is shown that these UWB systems are accurately modeled by second-order discrete-time Volterra systems. This proposed nonlinear equivalent system model is the basis for developing optimal and suboptimal receivers for differential UWB communications systems under ISI. As an example, we describe a maximum likelihood sequence detector with decision feedback, to be applied at the output of the receiver front-end sampled at symbol rate, and an adaptive inverse modeling equalizer. Both methods significantly increase the robustness in presence of multipath interference at tractable complexity.</description><subject>Communication systems</subject><subject>Communications systems</subject><subject>Correlators</subject><subject>Detectors</subject><subject>Differential receivers</subject><subject>equalization</subject><subject>Equalizers</subject><subject>Equivalence</subject><subject>impulse radio (IR)</subject><subject>Impulses</subject><subject>Intersymbol interference</subject><subject>Inverse problems</subject><subject>Mathematical models</subject><subject>Maximum likelihood detection</subject><subject>Output feedback</subject><subject>Pulse modulation</subject><subject>Radio</subject><subject>Receivers</subject><subject>Symbols</subject><subject>transmitted reference</subject><subject>Ultra wideband communication</subject><subject>Ultra wideband technology</subject><subject>ultra-wideband (UWB) communications</subject><subject>Volterra systems</subject><issn>0733-8716</issn><issn>1558-0008</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNp9kUtLAzEURoMoWKt7wU1woaupN5lkklnWUl8UBLW4DGkmAynzaJMZof56U6YguJAs7iLnuw8OQpcEJoRAfvfyPp1NKACfSJ5KkR2hEeFcJgAgj9EIRJomUpDsFJ2FsAYgjEk6Qm_zbe--dGWbDodd6GyN67awFdZNge2215X71p1rG9yWuHBlaX1Ena6wqzd9FSz2unAtXn7eH_LhHJ2UOv5cHOoYLR_mH7OnZPH6-DybLhKT8rRLqJFABZj4LGXUGAYlyExwwktKZGnTYrUCVnCRCasLQhlkjBvOAagRTKZjdDv03fh229vQqdoFY6tKN7btg5J5RoSkjETy5l-SShA0J3kEr_-A67b3TbxCySyPK0i-nwsDZHwbgrel2nhXa79TBNTehdq7UHsXanARI1dDxFlrf3EOLCcy_QF9a4P1</recordid><startdate>20050901</startdate><enddate>20050901</enddate><creator>Witrisal, K.</creator><creator>Leus, G.</creator><creator>Pausini, M.</creator><creator>Krall, C.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>20050901</creationdate><title>Equivalent system model and equalization of differential impulse radio UWB systems</title><author>Witrisal, K. ; Leus, G. ; Pausini, M. ; Krall, C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c353t-2c80270c0c0e242cc40f0867515f218fe3dbb04d5767ead1240645c55002c7483</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Communication systems</topic><topic>Communications systems</topic><topic>Correlators</topic><topic>Detectors</topic><topic>Differential receivers</topic><topic>equalization</topic><topic>Equalizers</topic><topic>Equivalence</topic><topic>impulse radio (IR)</topic><topic>Impulses</topic><topic>Intersymbol interference</topic><topic>Inverse problems</topic><topic>Mathematical models</topic><topic>Maximum likelihood detection</topic><topic>Output feedback</topic><topic>Pulse modulation</topic><topic>Radio</topic><topic>Receivers</topic><topic>Symbols</topic><topic>transmitted reference</topic><topic>Ultra wideband communication</topic><topic>Ultra wideband technology</topic><topic>ultra-wideband (UWB) communications</topic><topic>Volterra systems</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Witrisal, K.</creatorcontrib><creatorcontrib>Leus, G.</creatorcontrib><creatorcontrib>Pausini, M.</creatorcontrib><creatorcontrib>Krall, C.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>IEEE journal on selected areas in communications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Witrisal, K.</au><au>Leus, G.</au><au>Pausini, M.</au><au>Krall, C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Equivalent system model and equalization of differential impulse radio UWB systems</atitle><jtitle>IEEE journal on selected areas in communications</jtitle><stitle>J-SAC</stitle><date>2005-09-01</date><risdate>2005</risdate><volume>23</volume><issue>9</issue><spage>1851</spage><epage>1862</epage><pages>1851-1862</pages><issn>0733-8716</issn><eissn>1558-0008</eissn><coden>ISACEM</coden><abstract>A discrete-time equivalent system model is derived for differential and transmitted reference (TR) ultra-wideband (UWB) impulse radio (IR) systems, operating under heavy intersymbol-interference (ISI) caused by multipath propagation. In the systems discussed, data is transmitted using differential modulation on a frame-level, i.e., among UWB pulses. Multiple pulses (frames) are used to convey a single bit. Time hopping and amplitude codes are applied for multi user communications, employing a receiver front-end that consists of a bank of pulse-pair correlators. It is shown that these UWB systems are accurately modeled by second-order discrete-time Volterra systems. This proposed nonlinear equivalent system model is the basis for developing optimal and suboptimal receivers for differential UWB communications systems under ISI. As an example, we describe a maximum likelihood sequence detector with decision feedback, to be applied at the output of the receiver front-end sampled at symbol rate, and an adaptive inverse modeling equalizer. Both methods significantly increase the robustness in presence of multipath interference at tractable complexity.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/JSAC.2005.853876</doi><tpages>12</tpages></addata></record> |
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| ispartof | IEEE journal on selected areas in communications, 2005-09, Vol.23 (9), p.1851-1862 |
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| source | IEEE Electronic Library (IEL) |
| subjects | Communication systems Communications systems Correlators Detectors Differential receivers equalization Equalizers Equivalence impulse radio (IR) Impulses Intersymbol interference Inverse problems Mathematical models Maximum likelihood detection Output feedback Pulse modulation Radio Receivers Symbols transmitted reference Ultra wideband communication Ultra wideband technology ultra-wideband (UWB) communications Volterra systems |
| title | Equivalent system model and equalization of differential impulse radio UWB systems |
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