Blind Channel Estimation in Multicode CDMA Using Multiantenna Receiver |
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Authors: | Melvasalo Maarit Koivunen Visa |
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Affiliation: | (1) Signal Processing Laboratory, SMARAD CoE, Helsinki University of Technology, P.O. Box 3000, FIN-02015 HUT, Finland |
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Abstract: | In this paper blind channel estimation methods for long code CDMA system with multicode transmission are proposed. By allocating
multiple codes, higher data rates may be provided to a user. Blind channel estimation allows reducing pilot signaling. Hence,
higher effective data rates may be achieved and larger sample support may be obtained by using both the information symbols
and known pilot symbols for channel estimation. Algorithms are extended to multi-antenna receiver which further improves the
performance. The performance of the algorithms is studied in extensive simulations using WCDMA system model. The effects of
code selection, interference and noise, number of antennas, antenna correlation are considered using frequency selective channel
models. The proposed methods are more robust in the face of interference and code selection than the well-known subspace method
in 7]. The computational complexity is lower as well. |
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Keywords: | WCDMA multicode antenna array blind channel estimation subspace methods |
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