STAR channel estimation in DS-CDMA communication systems
A. Manikas, Li-Ke Huang · IEE Proceedings - Communications · 2004
A novel blind DS-CDMA array channel estimator is presented which is capable of handling severe frequency-selective channels, where the multipath delay spread can be comparable with the data symbol period. By employing the concept of the spatiotemporal array (STAR) manifold, a subspace-type estimation algorithm is proposed, in conjunction with an one-dimensional temporal smoothing procedure, to jointly estimate the spatiotemporal multipath-channel parameters associated with the desired user. Close examination of the proposed STAR channel estimator reveals that it is ‘near–far’ resistant and the total number of signal paths can be more than the number of antenna elements. The effectiveness of the proposed approach is supported by computer simulation results.