Simulating the Long Term Evolution (LTE) Downlink Physical Layer

In this paper we investigate a comprehensive analysis of Long Term Evolution Advanced (LTE) downlink (DL) physical layer performance using Multi Input Multi Output channel (MIMO) based on standard parameters. The work consists firstly in modeling LTE physical downlink shared channel (PDSCH). The developed model is based on an independent functional blocks in order to facilitate reproduction of signal processing techniques results used in LTE and particularly to evaluate the physical layer downlink components. Thereafter, it was integrated in the simulator, basic structure with AWGN channel including evaluation of using diversity and spatial multiplexing transmissions on downlink connections and multipath fading channel model. The simulation examples are illustrated with different digital modulation and MIMO scheme. BER and throughput results with multipath impact on transmission channel quality are also considered. These results show that the model implemented in Matlab faithfully advantages introduced in the LTE system.