In antenna array wideband DS-CDMA systems the propagation medium is a vector channel. Moreover the multipaths that define the channel are spatially and temporally diffused such that each multipath appears as a cluster rather than a point like signal source. Hence channel estimation techniques that do not exploit the structure of the vector channel become inefficient. In this context, a subspace approach to estimate the diffused vector channels for multi-user wideband DS-CDMA systems is being

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... posed. The diffused vector channel is parameterized in terms of multipath directions and times of arrival. Then by employing the structure of the developed diffused vector channel, a powerful blind near-far resistant channel estimation algorithm is derived. Simulation results are provided to illustrate the efficiency of the algorithm.