Modelos de canal wireless en el espectro de la televisión digital

The present project is a study about the parameters and methods associated with the spatial channel modelling that are common to the needs of the 3GPP and 3GPP2 organizations. We will work on physical parameters such as power delay profiles, angles spread, dependencies between parameters and a system evaluating methodology as the same way the IEEE 802.20 Working Group has done it before, but with an important difference; we’ll work with a different frequency in order to study the characteristics of the wireless channel models at low frequencies. We’ll study the behaviour for the DTV frequency band, seeing the benefits of allocating portions of the spectrum between 470 MHz and 862 MHz for broadband wireless services. Link level simulation alone will not be used for algorithm comparision because they reflect only one snapshot of the channel behaviour. This is one of the reasons link level simulations will be used only for calibration (the comparision of performance results from different implementations of a given algorithm) and we’ll also study the system level simulation for the final algorithm. In channel modelling we have to consider also different scenarios as a basic factor, because different test environments have different channel parameters. Urban and rural areas will not have the same channel characteristics; neither will tow different places within a building as we’ll see.Ingeniería de Telecomunicació