Blind Reduced-Rank MMSE Detector for DS-CDMA Systems
<p/> <p>We first develop a reduced-rank minimum mean squared error (MMSE) detector for direct-sequence (DS) code division multiple access (CDMA) by forcing the linear MMSE detector to lie in a signal subspace of a reduced dimension. While a reduced-rank MMSE detector has lower complexity...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2002-01-01
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| Series: | EURASIP Journal on Advances in Signal Processing |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/S1110865702209087 |
| _version_ | 1818268013150863360 |
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| author | Ge Hongya Akansu Ali N Cai Xiaodong |
| author_facet | Ge Hongya Akansu Ali N Cai Xiaodong |
| author_sort | Ge Hongya |
| collection | DOAJ |
| description | <p/> <p>We first develop a reduced-rank minimum mean squared error (MMSE) detector for direct-sequence (DS) code division multiple access (CDMA) by forcing the linear MMSE detector to lie in a signal subspace of a reduced dimension. While a reduced-rank MMSE detector has lower complexity, it cannot outperform the full-rank MMSE detector. We then concentrate on the blind reduced-rank MMSE detector which is obtained from an estimated covariance matrix. Our analysis and simulation results show that when the desired user′s signal is in a low-dimensional subspace, there exists an optimal subspace so that the blind reduced-rank MMSE detector lying in this subspace has the best performance. By properly choosing a subsspace, we guarantee that the optimal blind reduced-rank MMSE detector is obtained. An adaptive blind reduced-rank MMSE detector, based on a subspace tracking algorithm, is developed. The adaptive blind reduced-rank MMSE detector exhibits superior steady-state performance and fast convergence speed.</p> |
| first_indexed | 2024-12-12T20:31:44Z |
| format | Article |
| id | doaj.art-c91c59aaeb7a47caaf0c9b117eea3064 |
| institution | Directory Open Access Journal |
| issn | 1687-6172 1687-6180 |
| language | English |
| last_indexed | 2024-12-12T20:31:44Z |
| publishDate | 2002-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Advances in Signal Processing |
| spelling | doaj.art-c91c59aaeb7a47caaf0c9b117eea30642022-12-22T00:13:00ZengSpringerOpenEURASIP Journal on Advances in Signal Processing1687-61721687-61802002-01-01200212356983Blind Reduced-Rank MMSE Detector for DS-CDMA SystemsGe HongyaAkansu Ali NCai Xiaodong<p/> <p>We first develop a reduced-rank minimum mean squared error (MMSE) detector for direct-sequence (DS) code division multiple access (CDMA) by forcing the linear MMSE detector to lie in a signal subspace of a reduced dimension. While a reduced-rank MMSE detector has lower complexity, it cannot outperform the full-rank MMSE detector. We then concentrate on the blind reduced-rank MMSE detector which is obtained from an estimated covariance matrix. Our analysis and simulation results show that when the desired user′s signal is in a low-dimensional subspace, there exists an optimal subspace so that the blind reduced-rank MMSE detector lying in this subspace has the best performance. By properly choosing a subsspace, we guarantee that the optimal blind reduced-rank MMSE detector is obtained. An adaptive blind reduced-rank MMSE detector, based on a subspace tracking algorithm, is developed. The adaptive blind reduced-rank MMSE detector exhibits superior steady-state performance and fast convergence speed.</p>http://dx.doi.org/10.1155/S1110865702209087CDMAblind multiuser detectionreduced-rankMMSEsubspace tracking |
| spellingShingle | Ge Hongya Akansu Ali N Cai Xiaodong Blind Reduced-Rank MMSE Detector for DS-CDMA Systems EURASIP Journal on Advances in Signal Processing CDMA blind multiuser detection reduced-rank MMSE subspace tracking |
| title | Blind Reduced-Rank MMSE Detector for DS-CDMA Systems |
| title_full | Blind Reduced-Rank MMSE Detector for DS-CDMA Systems |
| title_fullStr | Blind Reduced-Rank MMSE Detector for DS-CDMA Systems |
| title_full_unstemmed | Blind Reduced-Rank MMSE Detector for DS-CDMA Systems |
| title_short | Blind Reduced-Rank MMSE Detector for DS-CDMA Systems |
| title_sort | blind reduced rank mmse detector for ds cdma systems |
| topic | CDMA blind multiuser detection reduced-rank MMSE subspace tracking |
| url | http://dx.doi.org/10.1155/S1110865702209087 |
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