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http://dx.doi.org/10.7236/JIIBC.2019.19.5.47

Blind Adaptive Receiver based on Constant Modulus for Downlink MC-CDMA Systems  

Seo, Bangwon (Division of Electrical, Electronic, and Control Engineering, the Institute of IT Convergence Technology (IICT), Kongju National University)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.19, no.5, 2019 , pp. 47-54 More about this Journal
Abstract
In this paper, we consider a constant modulus (CM) based blind adaptive receiver design for downlink multi-carrier code-division multiple access (MC-CDMA) systems employing simple space-time block coding (STBC). In the paper, filter weight vectors used for the detection of the transmitted symbols are partitioned into its subvectors and then, special relations among the optimal subvectors minimizing the CM metric are derived. Using the special relations, we present a modified CM metric and propose a new blind adaptive stochastic-gradient CM algorithm (SG-CMA) by minimizing the modified CM metric. The proposed blind adaptive SG-CMA has faster convergence rate than the conventional SG-CMA because the filter weight vectors of the proposed scheme are updated in the region of satisfying the derived special relations. Computer simulation results are given to verify the superiority of the proposed SG-CMA.
Keywords
MC-CDMA; STBC; constant modulus algorithm (CMA); blind adaptive receiver; convergence rate;
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Times Cited By KSCI : 1  (Citation Analysis)
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