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Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/892AF729-7AF3-40B1-8483-E84853242429 | ||
| Year | 2007 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | G. N. Karystinos and D. A. Pados, “Supervised phase correction of blind space-time DS/CDMA channel estimates,” IEEE Transactions on Communications, vol. 55, no. 3, pp. 584 - 592, Mar. 2007. doi: 10.1109/TCOMM.2006.888881 https://doi.org/10.1109/TCOMM.2006.888881 | ||
| Appears in Collections |
Blind channel-estimation algorithms return phase-ambiguous estimates. From a receiver design point of view, the phase-ambiguity problem can be by-passed by differential modulation and detection at the expense of a well-known performance loss, in comparison with direct modulation and coherent detection schemes. An alternative approach is followed in this paper. A theoretical minimum mean-square error phase-estimation criterion leads to a supervised phase-recovery procedure that directly corrects the phase of arbitrary linear filter receivers through a simple closed-form projection operation. Conveniently, any known blind channel-estimation algorithm can be used to provide the initial phase-ambiguous estimate. The presentation is given in the context of adaptive space-time receiver designs for binary phase-shift keying direct-sequence code-division-multiple-access antenna array systems. Numerical and simulation studies support the theoretical developments and show that effective phase correction and multiple-access interference suppression can be achieved with about 2% pilot signaling
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