| Equivalent Time-Domain Representation and Uplink Channel Estimator for Multicarrier CDMA Systems |
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| 作者姓名： | 吴晓军 殷勤业 曾明 |
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| 作者单位： | Wu Xiaojun，Yin Qinye & Zeng Ming School of Electronics and Information Engineering，Xi'an Jiaotong University，Xi'an 710049，P. R. China |
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| 基金项目： | This project was supported by the National Natural Science Foundation of China (No. 69872029)，the Research Fund for Doctoral Program of Higher Education of China (No. 1999069808). |
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| 摘 要： | Many blind channel estimation methods have been proposed for direct sequence (DS) code-division multiple access (CDMA) systems, so we can certainly use them to estimate the finite impulse response (FIR) channel for the multi-carrier (MC-) CDMA system. In this paper, the MC-CDMA system is interpreted as an equivalent time-domain DS-CD-MA system with specific spreading codes. Then, an equivalently time-domain blind channel estimator is derived for the
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Equivalent Time-Domain Representation and Uplink Channel Estimator for Multicarrier CDMA Systems |
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| Wu Xiaojun,Yin Qinye & Zeng Ming School of Electronics and Information Engineering,Xi'an Jiaotong University,Xi'an ,P. R. China.Equivalent Time-Domain Representation and Uplink Channel Estimator for Multicarrier CDMA Systems[J].Journal of Systems Engineering and Electronics,2003,14(3). |
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| Authors: | Wu Xiaojun Yin Qinye & Zeng Ming School of Electronics and Information Engineering Xi'an Jiaotong University Xi'an P R China |
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| Institution: | School of Electronics and Information Engineering, Xi' an Jiaotong University, Xi' an 710049, P. R. China |
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| Abstract: | Many blind channel estimation methods have been proposed for direct sequence (DS) code-division multiple access (CDMA) systems, so we can certainly use them to estimate the finite impulse response (FIR) channel for the multi-carrier (MC-) CDMA system. In this paper, the MC-CDMA system is interpreted as an equivalent time-domain DS-CD-MA system with specific spreading codes. Then, an equivalently time-domain blind channel estimator is derived for the uplink MC-CDMA, which is based on second-order statistics of the received data. By exploiting singular value decomposition (SVD) and the finite alphabet property of transmitted symbols, the time-domain channel impulse response (CIR) for the uplink MC-CDMA can be accurately identified. Computer simulations illustrate both the validity and the overall performance of the proposed estimator. |
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| Keywords: | Multicarrier code-division multiple access Channel impulse response Multiple access interference Intersym-bol interference Cyclic prefix Blind channel estimation Multiuser detection |
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