Study of multiple frequency-offset and channel joint ML estimation over virtual multi-antennas OFDM system
A pilot-aided joint estimation of the carrier frequency offsets（CFO） and channels of a virtual multi-anten-nas（VMA） orthogonal frequency-division multiple（OFDM） system was considered.For a VMA-OFDM system,each pair of transmit and receive antennas possibly having a different CFO and CIR（channel impu...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2010-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74648331/ |
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| author | JIANG Jian JIANG Hua YAN Kai LIU Hai-tao |
| author_facet | JIANG Jian JIANG Hua YAN Kai LIU Hai-tao |
| author_sort | JIANG Jian |
| collection | DOAJ |
| description | A pilot-aided joint estimation of the carrier frequency offsets（CFO） and channels of a virtual multi-anten-nas（VMA） orthogonal frequency-division multiple（OFDM） system was considered.For a VMA-OFDM system,each pair of transmit and receive antennas possibly having a different CFO and CIR（channel impulse response） parameters made the parameters joint estimation a challenge task.By utilizing the series expansion of the matrix inversion and maximum likelihood（ML） criterion,a computationally efficient estimator allowing for simultaneously estimating the unknown pa-rameters was developed.The mean square-error（MSE） performance of the interested parameters for the proposed estima-tor was compared with the Cramer-Rao bound（CRB）.In addition,the pilot sequence design was investigated by analysis and simulations.Simulation results show that the proposed low-complexity estimator asymptotically achieves the CRB and overcomes the drawbacks of existing estimators. |
| format | Article |
| id | doaj-art-6db1dfc7388d471887916bf6de92af95 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2010-01-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-6db1dfc7388d471887916bf6de92af952025-01-14T08:26:29ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2010-01-01311974648331Study of multiple frequency-offset and channel joint ML estimation over virtual multi-antennas OFDM systemJIANG JianJIANG HuaYAN KaiLIU Hai-taoA pilot-aided joint estimation of the carrier frequency offsets（CFO） and channels of a virtual multi-anten-nas（VMA） orthogonal frequency-division multiple（OFDM） system was considered.For a VMA-OFDM system,each pair of transmit and receive antennas possibly having a different CFO and CIR（channel impulse response） parameters made the parameters joint estimation a challenge task.By utilizing the series expansion of the matrix inversion and maximum likelihood（ML） criterion,a computationally efficient estimator allowing for simultaneously estimating the unknown pa-rameters was developed.The mean square-error（MSE） performance of the interested parameters for the proposed estima-tor was compared with the Cramer-Rao bound（CRB）.In addition,the pilot sequence design was investigated by analysis and simulations.Simulation results show that the proposed low-complexity estimator asymptotically achieves the CRB and overcomes the drawbacks of existing estimators.http://www.joconline.com.cn/zh/article/74648331/virtual multi-antennasOFDMmultiple frequency offsetschannel coefficientsmaximum likelihoodCRB |
| spellingShingle | JIANG Jian JIANG Hua YAN Kai LIU Hai-tao Study of multiple frequency-offset and channel joint ML estimation over virtual multi-antennas OFDM system Tongxin xuebao virtual multi-antennas OFDM multiple frequency offsets channel coefficients maximum likelihood CRB |
| title | Study of multiple frequency-offset and channel joint ML estimation over virtual multi-antennas OFDM system |
| title_full | Study of multiple frequency-offset and channel joint ML estimation over virtual multi-antennas OFDM system |
| title_fullStr | Study of multiple frequency-offset and channel joint ML estimation over virtual multi-antennas OFDM system |
| title_full_unstemmed | Study of multiple frequency-offset and channel joint ML estimation over virtual multi-antennas OFDM system |
| title_short | Study of multiple frequency-offset and channel joint ML estimation over virtual multi-antennas OFDM system |
| title_sort | study of multiple frequency offset and channel joint ml estimation over virtual multi antennas ofdm system |
| topic | virtual multi-antennas OFDM multiple frequency offsets channel coefficients maximum likelihood CRB |
| url | http://www.joconline.com.cn/zh/article/74648331/ |
| work_keys_str_mv | AT jiangjian studyofmultiplefrequencyoffsetandchanneljointmlestimationovervirtualmultiantennasofdmsystem AT jianghua studyofmultiplefrequencyoffsetandchanneljointmlestimationovervirtualmultiantennasofdmsystem AT yankai studyofmultiplefrequencyoffsetandchanneljointmlestimationovervirtualmultiantennasofdmsystem AT liuhaitao studyofmultiplefrequencyoffsetandchanneljointmlestimationovervirtualmultiantennasofdmsystem |