Iterative Multiuser Detection for Asynchronous Multi-Sequence Signaling Based CDMA Systems
In this paper, an iterative multiuser detector (MUD) is addressed for asynchronous direct sequence spread spectrum communications systems employing multi-sequence signaling over a quasi-static frequency-selective fading channel. A bit-interleaved coded modulation (BICM) scheme, facilitating the &quo...
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description | In this paper, an iterative multiuser detector (MUD) is addressed for asynchronous direct sequence spread spectrum communications systems employing multi-sequence signaling over a quasi-static frequency-selective fading channel. A bit-interleaved coded modulation (BICM) scheme, facilitating the "turbo principle" receiver through iterative processing, is introduced to increase the time diversity. With a multi-sequence signaling set mapper constructed over expanded spreading sequences, each of which is regarded as a signal plane with uniformly distributed signal points assumed, user cross-correlations could be nevertheless increased under certain situations. A soft interference cancellation scheme, derived by the minimum mean-squared error (MMSE) sense on a basis of per sequence plane per user, is employed to compensate for the increased multiple access interference (MAI) at high system traffic load. Simulation results demonstrate system performance in comparison with both conventional standard coded and bandwidth-efficient coded DS-CDMA systems in terms of bit error rate under the same system traffic load, channel condition and given power and spectral efficiency |
doi_str_mv | 10.1109/VETECS.2006.1683226 |
format | Conference Proceeding |
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A bit-interleaved coded modulation (BICM) scheme, facilitating the "turbo principle" receiver through iterative processing, is introduced to increase the time diversity. With a multi-sequence signaling set mapper constructed over expanded spreading sequences, each of which is regarded as a signal plane with uniformly distributed signal points assumed, user cross-correlations could be nevertheless increased under certain situations. A soft interference cancellation scheme, derived by the minimum mean-squared error (MMSE) sense on a basis of per sequence plane per user, is employed to compensate for the increased multiple access interference (MAI) at high system traffic load. 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Simulation results demonstrate system performance in comparison with both conventional standard coded and bandwidth-efficient coded DS-CDMA systems in terms of bit error rate under the same system traffic load, channel condition and given power and spectral efficiency</description><subject>Detectors</subject><subject>Frequency-selective fading channels</subject><subject>Interference cancellation</subject><subject>Interleaved codes</subject><subject>Modulation coding</subject><subject>Multiaccess communication</subject><subject>Multiple access interference</subject><subject>Multiuser detection</subject><subject>Spread spectrum communication</subject><subject>Telecommunication traffic</subject><issn>1550-2252</issn><isbn>9780780393912</isbn><isbn>0780393910</isbn><isbn>0780393929</isbn><isbn>9780780393929</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>2006</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNotkEFPwjAYhmvUREB-AZf-geH3tbZ0RxyoJBAPQw9eSNd9wxrYdO1M9u_VwOnNkzx5Di9jE4QpIqR3b8vtMsunAkBPURsphL5gQ5gZkKlMRXrJxukfnBnFFRugUpAIocQNG4bwCXA_AykG7H0VqbXR_xDfdIfou0AtX1AkF31T86pp-Tz0tftom7rpwklKcvruqHbEc7-v7cHXe_5gA5U8W2zmPO9DpGO4ZdeVPQQan3fEXh-X2-w5Wb88rbL5OvE4UzGxBYFDUzhVaChROgOKNFUKqbCFK4UFUWlrsbQp_lskSiKnjDGoy8rJEZucup6Idl-tP9q2351_kb_-E1ew</recordid><startdate>2006</startdate><enddate>2006</enddate><creator>Der-Feng Tseng</creator><creator>Keng-Chi Lu</creator><general>IEEE</general><scope>6IE</scope><scope>6IH</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIO</scope></search><sort><creationdate>2006</creationdate><title>Iterative Multiuser Detection for Asynchronous Multi-Sequence Signaling Based CDMA Systems</title><author>Der-Feng Tseng ; Keng-Chi Lu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i175t-abe0c18bc5b60d13c805e6ef51ebabcd2a02f6aa1da91bc5be2deec588816dfc3</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Detectors</topic><topic>Frequency-selective fading channels</topic><topic>Interference cancellation</topic><topic>Interleaved codes</topic><topic>Modulation coding</topic><topic>Multiaccess communication</topic><topic>Multiple access interference</topic><topic>Multiuser detection</topic><topic>Spread spectrum communication</topic><topic>Telecommunication traffic</topic><toplevel>online_resources</toplevel><creatorcontrib>Der-Feng Tseng</creatorcontrib><creatorcontrib>Keng-Chi Lu</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>Der-Feng Tseng</au><au>Keng-Chi Lu</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>Iterative Multiuser Detection for Asynchronous Multi-Sequence Signaling Based CDMA Systems</atitle><btitle>2006 IEEE 63rd Vehicular Technology Conference</btitle><stitle>VETECS</stitle><date>2006</date><risdate>2006</risdate><volume>5</volume><spage>2098</spage><epage>2102</epage><pages>2098-2102</pages><issn>1550-2252</issn><isbn>9780780393912</isbn><isbn>0780393910</isbn><eisbn>0780393929</eisbn><eisbn>9780780393929</eisbn><abstract>In this paper, an iterative multiuser detector (MUD) is addressed for asynchronous direct sequence spread spectrum communications systems employing multi-sequence signaling over a quasi-static frequency-selective fading channel. A bit-interleaved coded modulation (BICM) scheme, facilitating the "turbo principle" receiver through iterative processing, is introduced to increase the time diversity. With a multi-sequence signaling set mapper constructed over expanded spreading sequences, each of which is regarded as a signal plane with uniformly distributed signal points assumed, user cross-correlations could be nevertheless increased under certain situations. A soft interference cancellation scheme, derived by the minimum mean-squared error (MMSE) sense on a basis of per sequence plane per user, is employed to compensate for the increased multiple access interference (MAI) at high system traffic load. Simulation results demonstrate system performance in comparison with both conventional standard coded and bandwidth-efficient coded DS-CDMA systems in terms of bit error rate under the same system traffic load, channel condition and given power and spectral efficiency</abstract><pub>IEEE</pub><doi>10.1109/VETECS.2006.1683226</doi><tpages>5</tpages></addata></record> |
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ispartof | 2006 IEEE 63rd Vehicular Technology Conference, 2006, Vol.5, p.2098-2102 |
issn | 1550-2252 |
language | eng |
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source | IEEE Electronic Library (IEL) Conference Proceedings |
subjects | Detectors Frequency-selective fading channels Interference cancellation Interleaved codes Modulation coding Multiaccess communication Multiple access interference Multiuser detection Spread spectrum communication Telecommunication traffic |
title | Iterative Multiuser Detection for Asynchronous Multi-Sequence Signaling Based CDMA Systems |
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