Multicarrier Block-Spread CDMA for Broadband Cellular Downlink
<p/> <p>Effective suppression of multiuser interference (MUI) and mitigation of frequency-selective fading effects within the complexity constraints of the mobile constitute major challenges for broadband cellular downlink transceiver design. Existing wideband direct-sequence (DS) code d...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2004-01-01
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| Series: | EURASIP Journal on Advances in Signal Processing |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/S1110865704401048 |
| _version_ | 1828843726267482112 |
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| author | Leus Geert De Man Hugo Moonen Marc Petré Frederik |
| author_facet | Leus Geert De Man Hugo Moonen Marc Petré Frederik |
| author_sort | Leus Geert |
| collection | DOAJ |
| description | <p/> <p>Effective suppression of multiuser interference (MUI) and mitigation of frequency-selective fading effects within the complexity constraints of the mobile constitute major challenges for broadband cellular downlink transceiver design. Existing wideband direct-sequence (DS) code division multiple access (CDMA) transceivers suppress MUI statistically by restoring the orthogonality among users at the receiver. However, they call for receive diversity and multichannel equalization to improve the fading effects caused by deep channel fades. Relying on redundant block spreading and linear precoding, we design a so-called multicarrier block-spread- (MCBS-)CDMA transceiver that preserves the orthogonality among users and guarantees symbol detection, regardless of the underlying frequency-selective fading channels. These properties allow for deterministic MUI elimination through low-complexity block despreading and enable full diversity gains, irrespective of the system load. Different options to perform equalization and decoding, either jointly or separately, strike the trade-off between performance and complexity. To improve the performance over multi-input multi-output (MIMO) multipath fading channels, our MCBS-CDMA transceiver combines well with space-time block-coding (STBC) techniques, to exploit both multiantenna and multipath diversity gains, irrespective of the system load. Simulation results demonstrate the superior performance of MCBS-CDMA compared to competing alternatives.</p> |
| first_indexed | 2024-12-12T20:51:49Z |
| format | Article |
| id | doaj.art-25a7a31bf26349a68ea8a248af82e899 |
| institution | Directory Open Access Journal |
| issn | 1687-6172 1687-6180 |
| language | English |
| last_indexed | 2024-12-12T20:51:49Z |
| publishDate | 2004-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Advances in Signal Processing |
| spelling | doaj.art-25a7a31bf26349a68ea8a248af82e8992022-12-22T00:12:24ZengSpringerOpenEURASIP Journal on Advances in Signal Processing1687-61721687-61802004-01-01200410354827Multicarrier Block-Spread CDMA for Broadband Cellular DownlinkLeus GeertDe Man HugoMoonen MarcPetré Frederik<p/> <p>Effective suppression of multiuser interference (MUI) and mitigation of frequency-selective fading effects within the complexity constraints of the mobile constitute major challenges for broadband cellular downlink transceiver design. Existing wideband direct-sequence (DS) code division multiple access (CDMA) transceivers suppress MUI statistically by restoring the orthogonality among users at the receiver. However, they call for receive diversity and multichannel equalization to improve the fading effects caused by deep channel fades. Relying on redundant block spreading and linear precoding, we design a so-called multicarrier block-spread- (MCBS-)CDMA transceiver that preserves the orthogonality among users and guarantees symbol detection, regardless of the underlying frequency-selective fading channels. These properties allow for deterministic MUI elimination through low-complexity block despreading and enable full diversity gains, irrespective of the system load. Different options to perform equalization and decoding, either jointly or separately, strike the trade-off between performance and complexity. To improve the performance over multi-input multi-output (MIMO) multipath fading channels, our MCBS-CDMA transceiver combines well with space-time block-coding (STBC) techniques, to exploit both multiantenna and multipath diversity gains, irrespective of the system load. Simulation results demonstrate the superior performance of MCBS-CDMA compared to competing alternatives.</p>http://dx.doi.org/10.1155/S1110865704401048multicarrier CDMAbroadband cellular systemfrequency-selective fading channelsequalizationMIMOspace-time block coding |
| spellingShingle | Leus Geert De Man Hugo Moonen Marc Petré Frederik Multicarrier Block-Spread CDMA for Broadband Cellular Downlink EURASIP Journal on Advances in Signal Processing multicarrier CDMA broadband cellular system frequency-selective fading channels equalization MIMO space-time block coding |
| title | Multicarrier Block-Spread CDMA for Broadband Cellular Downlink |
| title_full | Multicarrier Block-Spread CDMA for Broadband Cellular Downlink |
| title_fullStr | Multicarrier Block-Spread CDMA for Broadband Cellular Downlink |
| title_full_unstemmed | Multicarrier Block-Spread CDMA for Broadband Cellular Downlink |
| title_short | Multicarrier Block-Spread CDMA for Broadband Cellular Downlink |
| title_sort | multicarrier block spread cdma for broadband cellular downlink |
| topic | multicarrier CDMA broadband cellular system frequency-selective fading channels equalization MIMO space-time block coding |
| url | http://dx.doi.org/10.1155/S1110865704401048 |
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