Abstract
The problems of blind timing acquisition and channel estimation for DS-CDMA signals in multipath fading channels are investigated. Using only the spreading code of the desired user, methods based on QR decompositions are proposed. These methods perform comparably or even better than subspace based methods with an order lower complexity. Furthermore, the methods exhibit significantly more robustness to channel order mismatch. Based on the acquired timing information, channel estimation algorithms are also developed which are competitive with the previously proposed subspace based channel estimation algorithms. In addition, a channel order estimation algorithm is proposed for the scenario where the order is unknown. Performance of the proposed algorithms is evaluated through simulation and comparison to asymptotic Cramér-Rao bounds.
This work was supported by the National Science Foundation under CAREER Grant NCR 96-24375.
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Pi, Z., Mitra, U. (2002). On Blind Timing Acquisition and Channel Estimation for Wideband Multiuser DS-CDMA Systems. In: Poor, H.V., Tong, L. (eds) Signal Processing for Wireless Communication Systems. Information Technology: Transmission, Processing and Storage. Springer, Boston, MA. https://doi.org/10.1007/0-306-47322-4_9
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DOI: https://doi.org/10.1007/0-306-47322-4_9
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