Statistical Cellular Scatter Density Model (GSDM ) Employing Smart Antennas dor Macrocell Environments-Edición Única
Jesus Mario Castrellón Rubio
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The tremendous growth in technology has led many applications in wireless communications. To provide high quality services and to increase capacity in wireless systems, improved methods to combat multipath effects must be developed. Then a study of the spatial properties of the received fading signal becomes necessary, in order to have spatial channel models that describe the parameters of the multipath components . There are three important parameters that characterize a channel of communications: • The power of the multipath components. • The AOA of the multipath components. • The TOA of the multipath components. This thesis deals principally only with one of this parameters the AOA, because a deeper study would be necessary if we want to include more characteristics, but a simulation taking into account the power of the multipath components is also made. The use of antennas arrays at the BS permits the improvement of system performance. Recently, there has been intensive research on smart antennas in mobile communications for exploiting the spatial domain, example, null steering for isolating co-channel users; optimum combining for reducing multipath fading and suppressing interference; and beam steering for focusing energy toward desired users.Thus smart antennas are a promising technology for increasing capacity in macrocellular and microcellular systems.