Simple Electrical Predistortion Method Using Schottky Diode for Radio-Over-Fiber Systems
A simple low-current consumption analog predistortion circuit is designed to enhance linearity. The circuit is experimentally verified in a radio-over-fiber (RoF) systems. A Schottky diode is used to compensate for the nonlinearity of RoF systems. An L-I curve for a laser diode is compared with the...
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| Veröffentlicht in: | IEEE photonics technology letters 2015-04, Vol.27 (8), p.907-910 |
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| container_title | IEEE photonics technology letters |
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| creator | Son, Byung-Hee Kim, Kwang-Jin Li, Ye Park, Chang-In Choi, Young-Wan |
| description | A simple low-current consumption analog predistortion circuit is designed to enhance linearity. The circuit is experimentally verified in a radio-over-fiber (RoF) systems. A Schottky diode is used to compensate for the nonlinearity of RoF systems. An L-I curve for a laser diode is compared with the I-V curve of the Schottky diode and the nonlinear characteristics are analyzed. The predistortion circuit is composed of two paths: 1) the nonlinear circuit with a Schottky diode to compensate for the laser diode nonlinearity and 2) the electrical delay line for a time delay. These two paths are recombined to suppress the IMD3 (third order intermodulation distortion) of the laser diode. Experimental results show that enhancements of ~26 dBc in the IMD3 and ~7.5 dB in the spurious-free dynamic range are achieved at 2.4 GHz. The proposed predistortion system has a significant reduction in current consumption compared with previous linearization techniques. In addition, error vector magnitude is satisfied under 4% with 64-quadratic-amplitude modulation. |
| doi_str_mv | 10.1109/LPT.2015.2400051 |
| format | Article |
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The circuit is experimentally verified in a radio-over-fiber (RoF) systems. A Schottky diode is used to compensate for the nonlinearity of RoF systems. An L-I curve for a laser diode is compared with the I-V curve of the Schottky diode and the nonlinear characteristics are analyzed. The predistortion circuit is composed of two paths: 1) the nonlinear circuit with a Schottky diode to compensate for the laser diode nonlinearity and 2) the electrical delay line for a time delay. These two paths are recombined to suppress the IMD3 (third order intermodulation distortion) of the laser diode. Experimental results show that enhancements of ~26 dBc in the IMD3 and ~7.5 dB in the spurious-free dynamic range are achieved at 2.4 GHz. The proposed predistortion system has a significant reduction in current consumption compared with previous linearization techniques. In addition, error vector magnitude is satisfied under 4% with 64-quadratic-amplitude modulation.</description><identifier>ISSN: 1041-1135</identifier><identifier>EISSN: 1941-0174</identifier><identifier>DOI: 10.1109/LPT.2015.2400051</identifier><identifier>CODEN: IPTLEL</identifier><language>eng</language><publisher>IEEE</publisher><subject>Diode lasers ; Modulation ; nonlinearity ; Optical fibers ; Optical transmitters ; Predistortion ; Radio frequency ; radio over fiber systems ; Schottky diode ; Schottky diodes ; third-order intermodulation</subject><ispartof>IEEE photonics technology letters, 2015-04, Vol.27 (8), p.907-910</ispartof><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c263t-4991abb8557053175ef0f9606fca3df7e7b6bb1229a015f909a780b4ac0e33333</citedby><cites>FETCH-LOGICAL-c263t-4991abb8557053175ef0f9606fca3df7e7b6bb1229a015f909a780b4ac0e33333</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/7042830$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,776,780,792,27901,27902,54733</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/7042830$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Son, Byung-Hee</creatorcontrib><creatorcontrib>Kim, Kwang-Jin</creatorcontrib><creatorcontrib>Li, Ye</creatorcontrib><creatorcontrib>Park, Chang-In</creatorcontrib><creatorcontrib>Choi, Young-Wan</creatorcontrib><title>Simple Electrical Predistortion Method Using Schottky Diode for Radio-Over-Fiber Systems</title><title>IEEE photonics technology letters</title><addtitle>LPT</addtitle><description>A simple low-current consumption analog predistortion circuit is designed to enhance linearity. The circuit is experimentally verified in a radio-over-fiber (RoF) systems. A Schottky diode is used to compensate for the nonlinearity of RoF systems. An L-I curve for a laser diode is compared with the I-V curve of the Schottky diode and the nonlinear characteristics are analyzed. The predistortion circuit is composed of two paths: 1) the nonlinear circuit with a Schottky diode to compensate for the laser diode nonlinearity and 2) the electrical delay line for a time delay. These two paths are recombined to suppress the IMD3 (third order intermodulation distortion) of the laser diode. Experimental results show that enhancements of ~26 dBc in the IMD3 and ~7.5 dB in the spurious-free dynamic range are achieved at 2.4 GHz. The proposed predistortion system has a significant reduction in current consumption compared with previous linearization techniques. In addition, error vector magnitude is satisfied under 4% with 64-quadratic-amplitude modulation.</description><subject>Diode lasers</subject><subject>Modulation</subject><subject>nonlinearity</subject><subject>Optical fibers</subject><subject>Optical transmitters</subject><subject>Predistortion</subject><subject>Radio frequency</subject><subject>radio over fiber systems</subject><subject>Schottky diode</subject><subject>Schottky diodes</subject><subject>third-order intermodulation</subject><issn>1041-1135</issn><issn>1941-0174</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kEFLAzEQhYMoWKt3wUv-wNaZTbLbHKW2KlRabAveluzuxEbbpiRB6L93S4vvMu_w3sD7GLtHGCCCfpzOl4McUA1yCQAKL1gPtcQMsJSXnYfOIwp1zW5i_AZAqYTssc-F2-43xMcbalJwjdnweaDWxeRDcn7H3ymtfctX0e2--KJZ-5R-DvzZ-Za49YF_mNb5bPZLIZu4mgJfHGKibbxlV9ZsIt2db5-tJuPl6DWbzl7eRk_TrMkLkTKpNZq6HipVghJYKrJgdQGFbYxobUllXdQ15rk23TirQZtyCLU0DZA4qs_g9LcJPsZAttoHtzXhUCFURzJVR6Y6kqnOZLrKw6niiOg_XoLMhwLEH3ogX2A</recordid><startdate>20150415</startdate><enddate>20150415</enddate><creator>Son, Byung-Hee</creator><creator>Kim, Kwang-Jin</creator><creator>Li, Ye</creator><creator>Park, Chang-In</creator><creator>Choi, Young-Wan</creator><general>IEEE</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20150415</creationdate><title>Simple Electrical Predistortion Method Using Schottky Diode for Radio-Over-Fiber Systems</title><author>Son, Byung-Hee ; Kim, Kwang-Jin ; Li, Ye ; Park, Chang-In ; Choi, Young-Wan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c263t-4991abb8557053175ef0f9606fca3df7e7b6bb1229a015f909a780b4ac0e33333</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Diode lasers</topic><topic>Modulation</topic><topic>nonlinearity</topic><topic>Optical fibers</topic><topic>Optical transmitters</topic><topic>Predistortion</topic><topic>Radio frequency</topic><topic>radio over fiber systems</topic><topic>Schottky diode</topic><topic>Schottky diodes</topic><topic>third-order intermodulation</topic><toplevel>online_resources</toplevel><creatorcontrib>Son, Byung-Hee</creatorcontrib><creatorcontrib>Kim, Kwang-Jin</creatorcontrib><creatorcontrib>Li, Ye</creatorcontrib><creatorcontrib>Park, Chang-In</creatorcontrib><creatorcontrib>Choi, Young-Wan</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><jtitle>IEEE photonics technology letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Son, Byung-Hee</au><au>Kim, Kwang-Jin</au><au>Li, Ye</au><au>Park, Chang-In</au><au>Choi, Young-Wan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Simple Electrical Predistortion Method Using Schottky Diode for Radio-Over-Fiber Systems</atitle><jtitle>IEEE photonics technology letters</jtitle><stitle>LPT</stitle><date>2015-04-15</date><risdate>2015</risdate><volume>27</volume><issue>8</issue><spage>907</spage><epage>910</epage><pages>907-910</pages><issn>1041-1135</issn><eissn>1941-0174</eissn><coden>IPTLEL</coden><abstract>A simple low-current consumption analog predistortion circuit is designed to enhance linearity. The circuit is experimentally verified in a radio-over-fiber (RoF) systems. A Schottky diode is used to compensate for the nonlinearity of RoF systems. An L-I curve for a laser diode is compared with the I-V curve of the Schottky diode and the nonlinear characteristics are analyzed. The predistortion circuit is composed of two paths: 1) the nonlinear circuit with a Schottky diode to compensate for the laser diode nonlinearity and 2) the electrical delay line for a time delay. These two paths are recombined to suppress the IMD3 (third order intermodulation distortion) of the laser diode. Experimental results show that enhancements of ~26 dBc in the IMD3 and ~7.5 dB in the spurious-free dynamic range are achieved at 2.4 GHz. The proposed predistortion system has a significant reduction in current consumption compared with previous linearization techniques. In addition, error vector magnitude is satisfied under 4% with 64-quadratic-amplitude modulation.</abstract><pub>IEEE</pub><doi>10.1109/LPT.2015.2400051</doi><tpages>4</tpages></addata></record> |
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| source | IEEE Electronic Library (IEL) |
| subjects | Diode lasers Modulation nonlinearity Optical fibers Optical transmitters Predistortion Radio frequency radio over fiber systems Schottky diode Schottky diodes third-order intermodulation |
| title | Simple Electrical Predistortion Method Using Schottky Diode for Radio-Over-Fiber Systems |
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