Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal
Aiming at the problem of blind estimation of multi-user pseudo-code of multi-path asynchronous code division multiple access (CDMA) signal,using the finite element (FA) characteristic of transmitted symbol,a decision aid (DA) method based on maximum likelihood was proposed.A two-step iterative estim...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2020-08-01
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| Series: | Tongxin xuebao |
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| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2020163/ |
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| author | Zhaoyang QIU Tianyun LI Xiangming CHEN |
| author_facet | Zhaoyang QIU Tianyun LI Xiangming CHEN |
| author_sort | Zhaoyang QIU |
| collection | DOAJ |
| description | Aiming at the problem of blind estimation of multi-user pseudo-code of multi-path asynchronous code division multiple access (CDMA) signal,using the finite element (FA) characteristic of transmitted symbol,a decision aid (DA) method based on maximum likelihood was proposed.A two-step iterative estimation structure for PN code,transmitted bit and channel was designed to realize the estimation of multiple user code in asynchronous CDMA system with superior performance.Moreover,the Cramer-Rao bound (CRB) of PN code estimation in asynchronous CDMA signal was derived to evaluate the performance of proposed method.Simulation indicates significant improvement in performance which is close to the theory bound of the proposed method compared to commonly-used iterative least square with projection (ILSP) method.The method can also achieve superior estimation when the user number increases. |
| format | Article |
| id | doaj-art-c606dc50b42246c3a56cc28f20b57bd9 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2020-08-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-c606dc50b42246c3a56cc28f20b57bd92025-01-14T07:19:27ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2020-08-0141667859736004Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signalZhaoyang QIUTianyun LIXiangming CHENAiming at the problem of blind estimation of multi-user pseudo-code of multi-path asynchronous code division multiple access (CDMA) signal,using the finite element (FA) characteristic of transmitted symbol,a decision aid (DA) method based on maximum likelihood was proposed.A two-step iterative estimation structure for PN code,transmitted bit and channel was designed to realize the estimation of multiple user code in asynchronous CDMA system with superior performance.Moreover,the Cramer-Rao bound (CRB) of PN code estimation in asynchronous CDMA signal was derived to evaluate the performance of proposed method.Simulation indicates significant improvement in performance which is close to the theory bound of the proposed method compared to commonly-used iterative least square with projection (ILSP) method.The method can also achieve superior estimation when the user number increases.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2020163/asynchronous CDMAdecision-aidedblind PN code estimationCramer-Rao bound |
| spellingShingle | Zhaoyang QIU Tianyun LI Xiangming CHEN Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal Tongxin xuebao asynchronous CDMA decision-aided blind PN code estimation Cramer-Rao bound |
| title | Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal |
| title_full | Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal |
| title_fullStr | Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal |
| title_full_unstemmed | Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal |
| title_short | Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal |
| title_sort | decision aided based multiple blind pn code estimation algorithm of asynchronous cdma signal |
| topic | asynchronous CDMA decision-aided blind PN code estimation Cramer-Rao bound |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2020163/ |
| work_keys_str_mv | AT zhaoyangqiu decisionaidedbasedmultipleblindpncodeestimationalgorithmofasynchronouscdmasignal AT tianyunli decisionaidedbasedmultipleblindpncodeestimationalgorithmofasynchronouscdmasignal AT xiangmingchen decisionaidedbasedmultipleblindpncodeestimationalgorithmofasynchronouscdmasignal |