| Blind Multiuser Channel Identification Based on Rate Doubling and Modulation-Induced Cyclostationarity |
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| 作者姓名： | CAO Shi ke ZHANG Li jun |
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| 作者单位： | Nanjing University of Posts and Telecommunications，Nanjing 210003，P.R. China |
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| 摘 要： | 1 IntroductionInthemultiuseruplink ,eachuser’ssignalgoesthroughitschanneltothebasestationreceiver,wherethechannelhastobeidentifiedinordertoperformmultiuserdetection .Mostofthemultiuserdetectorsarelinear,includingZeroForcing (ZF)andMinimumMeanSquareError (MMSE)detec tors.Andtheyalldependontheestimationofthemultiuserchannels.Thetraditionalwayofestimat ingchannelsisbytraining .Buttheblindestimationofchannelsareadvantageous;besidesthefactthatitmaysaveagreatdealofbandwidth ,therearesitua ti…
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Blind Multiuser Channel Identification Based on Rate Doubling and Modulation-Induced Cyclostationarity |
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| CAO Shi ke,ZHANG Li jun.Blind Multiuser Channel Identification Based on Rate Doubling and Modulation-Induced Cyclostationarity[J].The Journal of China Universities of Posts and Telecommunications,2003,10(3). |
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| Authors: | Cao Shi-ke ZHANG Li-jun |
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| Abstract: | In this paper, a novel approach is put forward to the multiuser channel identification. The approach makes use of the modulation induced cyclostationarity to separate the second order cyclic statistics for every user,with the special features of one subspace for one user, so as to be able to identify individual channels of different users. In order to form a Single Input Two Output (SITO) system, the transmission rate is doubled by repeating at the transmitters. The approach is rather simple, suitable for the multiuser uplink. And the channel identifiability conditions with its proof are included in the paper. And finally the identification algorithm is proposed with simulation results. |
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| Keywords: | blind channel identification cyclostationarity second order cyclic statistics |
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