Power control with antenna array processing for UMTS

The benefits of employing antenna array processing for the interference limited UMTS system is the increase in the number of simultaneous users and the reduction in the transmitted uplink power. The joint power control and antenna processing offers maximum achievable capacity with lower transmission powers for the given target SINR (signal-to-interference+noise ratio). The analysis about possible achievements using antenna array processing, varying parameters such as the number of users in a microcell, processing gain and antenna array size for the given target SINR, has been done using a deterministic ray tracing model developed for urban microcells and considering two antenna processing cases, OC (optimum combining) and MRC (maximum ratio combining). The paper shows that the ratio between the target value and the processing gain is the most dominant factor for the antenna array performance in the power controlled environment, and that optimum transmitted powers obtained using OC are the least sensitive to the increase in the number of users, as compared to MRC and simple decorrelation on a single antenna element

Analysis of SINR for UMTS rake receiver-smart antenna processing using two different modelling approaches

In 3G mobile communication systems, smart antenna processing is seen as a powerful tool to combat directional interference. We derive the statistics of the signal-to-interference-plus-noise ratio (SINR) achieved by the combined RAKE receiver-smart antenna processing for the case where thermal noise is the only source of interference, and for the case of another interfering user. The results are based on the output of two channel models with disjoint approaches: deterministic ray-tracing model µFipre and the stochastic wideband directional channel model (WDCM)

Report Title: Deliverable D2.3: Channel Modelling for UMTS: Characterisation of Outdoor- and Outdoor-to-Indoor Propagation Editor: R.H. van Poppel (TU/e) Authors: R.H. van Poppel (TU/e)

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