Joint sampling-time error and channel skew calibration of time-interleaved ADC in multichannel fiber optic receivers
A joint sampling-time error and channel skew background calibration technique for time interleaved analog to digital converters (TI-ADC) is presented. The technique is aimed at applications in dual-polarization QPSK/QAM receivers for coherent optical communications at high data rates (e.g., 40Gb/s a...
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creator | Reyes, B. T. Gopinathan, V. Mandolesi, P. S. Hueda, M. R. |
description | A joint sampling-time error and channel skew background calibration technique for time interleaved analog to digital converters (TI-ADC) is presented. The technique is aimed at applications in dual-polarization QPSK/QAM receivers for coherent optical communications at high data rates (e.g., 40Gb/s and beyond). Unlike previous proposals, the calibration algorithm introduced here is used to jointly compensate for sampling-time and channel skew errors. Estimates of the gradient of the mean squared error (MSE) or the bit error rate (BER) with respect to the sampling phases of the different signal lanes and interleaves are computed and used to iteratively minimize a cost function (i.e., MSE or BER). Computer simulations demonstrate the excellent behavior of the proposed compensation technique. The calibration algorithm can be implemented with minimal hardware requirements and with a slow clock. This allows power dissipation in a CMOS VLSI implementation to be minimized. |
doi_str_mv | 10.1109/ISCAS.2012.6271944 |
format | Conference Proceeding |
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T. ; Gopinathan, V. ; Mandolesi, P. S. ; Hueda, M. R.</creator><creatorcontrib>Reyes, B. T. ; Gopinathan, V. ; Mandolesi, P. S. ; Hueda, M. R.</creatorcontrib><description>A joint sampling-time error and channel skew background calibration technique for time interleaved analog to digital converters (TI-ADC) is presented. The technique is aimed at applications in dual-polarization QPSK/QAM receivers for coherent optical communications at high data rates (e.g., 40Gb/s and beyond). Unlike previous proposals, the calibration algorithm introduced here is used to jointly compensate for sampling-time and channel skew errors. Estimates of the gradient of the mean squared error (MSE) or the bit error rate (BER) with respect to the sampling phases of the different signal lanes and interleaves are computed and used to iteratively minimize a cost function (i.e., MSE or BER). Computer simulations demonstrate the excellent behavior of the proposed compensation technique. The calibration algorithm can be implemented with minimal hardware requirements and with a slow clock. 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T.</creatorcontrib><creatorcontrib>Gopinathan, V.</creatorcontrib><creatorcontrib>Mandolesi, P. S.</creatorcontrib><creatorcontrib>Hueda, M. R.</creatorcontrib><title>Joint sampling-time error and channel skew calibration of time-interleaved ADC in multichannel fiber optic receivers</title><title>2012 IEEE International Symposium on Circuits and Systems (ISCAS)</title><addtitle>ISCAS</addtitle><description>A joint sampling-time error and channel skew background calibration technique for time interleaved analog to digital converters (TI-ADC) is presented. The technique is aimed at applications in dual-polarization QPSK/QAM receivers for coherent optical communications at high data rates (e.g., 40Gb/s and beyond). Unlike previous proposals, the calibration algorithm introduced here is used to jointly compensate for sampling-time and channel skew errors. Estimates of the gradient of the mean squared error (MSE) or the bit error rate (BER) with respect to the sampling phases of the different signal lanes and interleaves are computed and used to iteratively minimize a cost function (i.e., MSE or BER). Computer simulations demonstrate the excellent behavior of the proposed compensation technique. The calibration algorithm can be implemented with minimal hardware requirements and with a slow clock. This allows power dissipation in a CMOS VLSI implementation to be minimized.</description><subject>Adaptive optics</subject><subject>Bit error rate</subject><subject>Calibration</subject><subject>Optical noise</subject><subject>Optical receivers</subject><subject>Signal to noise ratio</subject><issn>0271-4302</issn><issn>2158-1525</issn><isbn>9781467302180</isbn><isbn>146730218X</isbn><isbn>1467302198</isbn><isbn>9781467302173</isbn><isbn>9781467302197</isbn><isbn>1467302171</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>2012</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNo1kMtOwzAQRc1Loi39Adj4Bxz8imMvo_AqqsSisK6cZAyGxImcUMTfk4p2NZo791zpDkLXjCaMUXO72hT5JuGU8UTxjBkpT9CcSZUJypnRp2jGWaoJS3l6hpYm08ebpudoRieEyGm9RPNh-KSUU6r4DI3PnQ8jHmzbNz68k9G3gCHGLmIbalx92BCgwcMX_ODKNr6MdvRdwJ3DeyuZYIgN2B3UOL8rsA-4_W5GfwSdLyHirp8UHKECv4M4XKELZ5sBloe5QG8P96_FE1m_PK6KfE08y9KRmJLxShmpRC25FswqmTmqjLDUlGlqQenSKVeB1NlUF_YGmFqzWtiSVk4s0M1_rgeAbR99a-Pv9vA98QfvHGCx</recordid><startdate>201205</startdate><enddate>201205</enddate><creator>Reyes, B. 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R.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan (POP) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Electronic Library (IEL)</collection><collection>IEEE Proceedings Order Plans (POP) 1998-present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Reyes, B. T.</au><au>Gopinathan, V.</au><au>Mandolesi, P. S.</au><au>Hueda, M. R.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>Joint sampling-time error and channel skew calibration of time-interleaved ADC in multichannel fiber optic receivers</atitle><btitle>2012 IEEE International Symposium on Circuits and Systems (ISCAS)</btitle><stitle>ISCAS</stitle><date>2012-05</date><risdate>2012</risdate><spage>2981</spage><epage>2984</epage><pages>2981-2984</pages><issn>0271-4302</issn><eissn>2158-1525</eissn><isbn>9781467302180</isbn><isbn>146730218X</isbn><eisbn>1467302198</eisbn><eisbn>9781467302173</eisbn><eisbn>9781467302197</eisbn><eisbn>1467302171</eisbn><abstract>A joint sampling-time error and channel skew background calibration technique for time interleaved analog to digital converters (TI-ADC) is presented. The technique is aimed at applications in dual-polarization QPSK/QAM receivers for coherent optical communications at high data rates (e.g., 40Gb/s and beyond). Unlike previous proposals, the calibration algorithm introduced here is used to jointly compensate for sampling-time and channel skew errors. Estimates of the gradient of the mean squared error (MSE) or the bit error rate (BER) with respect to the sampling phases of the different signal lanes and interleaves are computed and used to iteratively minimize a cost function (i.e., MSE or BER). Computer simulations demonstrate the excellent behavior of the proposed compensation technique. The calibration algorithm can be implemented with minimal hardware requirements and with a slow clock. This allows power dissipation in a CMOS VLSI implementation to be minimized.</abstract><pub>IEEE</pub><doi>10.1109/ISCAS.2012.6271944</doi><tpages>4</tpages></addata></record> |
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identifier | ISSN: 0271-4302 |
ispartof | 2012 IEEE International Symposium on Circuits and Systems (ISCAS), 2012, p.2981-2984 |
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language | eng |
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source | IEEE Electronic Library (IEL) Conference Proceedings |
subjects | Adaptive optics Bit error rate Calibration Optical noise Optical receivers Signal to noise ratio |
title | Joint sampling-time error and channel skew calibration of time-interleaved ADC in multichannel fiber optic receivers |
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