Predictability of uplink channels from downlink channels in frequency division duplex systems: a power control application
A novel method for performing predictive closed-loop power control is used to illustrate the predictability of uplink channels from downlink channels in a frequency division duplex (FDD) wireless link. In an uplink power control scenario, the proposed scheme performs uplink prediction using downlink...
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| Veröffentlicht in: | IEEE transactions on wireless communications 2004-09, Vol.3 (5), p.1781-1788, Article 1781 |
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| container_title | IEEE transactions on wireless communications |
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| creator | Ionescu, D.M. Boariu, A. |
| description | A novel method for performing predictive closed-loop power control is used to illustrate the predictability of uplink channels from downlink channels in a frequency division duplex (FDD) wireless link. In an uplink power control scenario, the proposed scheme performs uplink prediction using downlink-derived (linear) predictor coefficients. Essentially, the lack of correlation between the fading processes on uplink and downlink (due to FDD and frequency selective fading) is circumvented by using the uplink fading history, together with a set of link-independent, autoregressive (AR) coefficients. An AR model is used to formally describe the frequency selective fading process on either link, regardless of the number of Rayleigh paths. It is also proven that the relevant AR coefficients are common to both links, up to a proper normalization, irrespective of whether the number of paths on the uplink differs from that on the downlink. Both an uncoded and a coded system are simulated, and their performance results are compared, on equal grounds, with those of the corresponding nonpredictive systems. |
| doi_str_mv | 10.1109/TWC.2004.834689 |
| format | Article |
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In an uplink power control scenario, the proposed scheme performs uplink prediction using downlink-derived (linear) predictor coefficients. Essentially, the lack of correlation between the fading processes on uplink and downlink (due to FDD and frequency selective fading) is circumvented by using the uplink fading history, together with a set of link-independent, autoregressive (AR) coefficients. An AR model is used to formally describe the frequency selective fading process on either link, regardless of the number of Rayleigh paths. It is also proven that the relevant AR coefficients are common to both links, up to a proper normalization, irrespective of whether the number of paths on the uplink differs from that on the downlink. 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In an uplink power control scenario, the proposed scheme performs uplink prediction using downlink-derived (linear) predictor coefficients. Essentially, the lack of correlation between the fading processes on uplink and downlink (due to FDD and frequency selective fading) is circumvented by using the uplink fading history, together with a set of link-independent, autoregressive (AR) coefficients. An AR model is used to formally describe the frequency selective fading process on either link, regardless of the number of Rayleigh paths. It is also proven that the relevant AR coefficients are common to both links, up to a proper normalization, irrespective of whether the number of paths on the uplink differs from that on the downlink. Both an uncoded and a coded system are simulated, and their performance results are compared, on equal grounds, with those of the corresponding nonpredictive systems.</description><subject>Channels</subject><subject>Coherence</subject><subject>Downlink</subject><subject>Fading</subject><subject>Fluctuations</subject><subject>Frequency conversion</subject><subject>Frequency division</subject><subject>History</subject><subject>Land mobile radio</subject><subject>Links</subject><subject>Mathematical models</subject><subject>Power control</subject><subject>Prediction methods</subject><subject>Rayleigh channels</subject><subject>Selective fading</subject><subject>Studies</subject><subject>Wireless communication</subject><issn>1536-1276</issn><issn>1558-2248</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNp9kblPHDEYxUeISByhpqCxUoRqFh9jj00XrQJEQiLFRiktjw_hZdYebG_I5q_HyyJFUFDZev697_BrmlMEZwhBcbH4PZ9hCLsZJx3jYq85RJTyFuOO72_vhLUI9-ygOcp5CSHqGaWHzb-fyRqvixr86MsGRAfW0-jDA9D3KgQ7ZuBSXAETn8Jb2Yf6Yh_XNugNMP6Pzz4GYKrb_gV5k4td5UugwBSfbAI6hpLiCNRUq2tVKvu5-eTUmO3J63nc_Lr6vpjftLd31z_m325bTTpRWscEVc45ygZtTSeY6pxRmPWq30pQO8MNUr0Z-DCQoaoGGko654jjWCBy3Jzv6k4p1nFzkSuftR1HFWxcZ8kFwxhzIir59UMSc4oxIl0Fv7wDl3GdQt1Cck6YEJTiCl3sIJ1izsk6OSW_UmkjEZTbyGSNTG4jk7vIqoO-c2hfXv6qJOXHD3xnO5-31v7vUget65NnyMWnNQ</recordid><startdate>20040901</startdate><enddate>20040901</enddate><creator>Ionescu, D.M.</creator><creator>Boariu, A.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SC</scope><scope>7SP</scope><scope>8FD</scope><scope>JQ2</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>20040901</creationdate><title>Predictability of uplink channels from downlink channels in frequency division duplex systems: a power control application</title><author>Ionescu, D.M. ; Boariu, A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c349t-f695afff56bced496a4fda267a756bc0cfd8d1a7db8bb3ba75d0d534ff3f82913</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Channels</topic><topic>Coherence</topic><topic>Downlink</topic><topic>Fading</topic><topic>Fluctuations</topic><topic>Frequency conversion</topic><topic>Frequency division</topic><topic>History</topic><topic>Land mobile radio</topic><topic>Links</topic><topic>Mathematical models</topic><topic>Power control</topic><topic>Prediction methods</topic><topic>Rayleigh channels</topic><topic>Selective fading</topic><topic>Studies</topic><topic>Wireless communication</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ionescu, D.M.</creatorcontrib><creatorcontrib>Boariu, A.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><collection>Computer and Information Systems Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>IEEE transactions on wireless communications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Ionescu, D.M.</au><au>Boariu, A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Predictability of uplink channels from downlink channels in frequency division duplex systems: a power control application</atitle><jtitle>IEEE transactions on wireless communications</jtitle><stitle>TWC</stitle><date>2004-09-01</date><risdate>2004</risdate><volume>3</volume><issue>5</issue><spage>1781</spage><epage>1788</epage><pages>1781-1788</pages><artnum>1781</artnum><issn>1536-1276</issn><eissn>1558-2248</eissn><coden>ITWCAX</coden><abstract>A novel method for performing predictive closed-loop power control is used to illustrate the predictability of uplink channels from downlink channels in a frequency division duplex (FDD) wireless link. In an uplink power control scenario, the proposed scheme performs uplink prediction using downlink-derived (linear) predictor coefficients. Essentially, the lack of correlation between the fading processes on uplink and downlink (due to FDD and frequency selective fading) is circumvented by using the uplink fading history, together with a set of link-independent, autoregressive (AR) coefficients. An AR model is used to formally describe the frequency selective fading process on either link, regardless of the number of Rayleigh paths. It is also proven that the relevant AR coefficients are common to both links, up to a proper normalization, irrespective of whether the number of paths on the uplink differs from that on the downlink. Both an uncoded and a coded system are simulated, and their performance results are compared, on equal grounds, with those of the corresponding nonpredictive systems.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TWC.2004.834689</doi><tpages>8</tpages></addata></record> |
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| identifier | ISSN: 1536-1276 |
| ispartof | IEEE transactions on wireless communications, 2004-09, Vol.3 (5), p.1781-1788, Article 1781 |
| issn | 1536-1276 1558-2248 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Channels Coherence Downlink Fading Fluctuations Frequency conversion Frequency division History Land mobile radio Links Mathematical models Power control Prediction methods Rayleigh channels Selective fading Studies Wireless communication |
| title | Predictability of uplink channels from downlink channels in frequency division duplex systems: a power control application |
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