Performance Analysis of Channel Condition & Channel Model of LTE in Various Transmission Mode in Bangladesh

Abstract

Long Term Evaluation(LTE) is an emerging 4G wireless technology. Multiple-Input Multiple-Output (MIMO) systems are a primary enabler of the high data rate south to be achieved by LTE . In LTE /LTE -advanced standards, the physical layer is mapped into multiple transmission modes(TM) and each TM should be dynamically selected depending on the time-varying MIMO channel. Besides the single antenna SISO transmission (TM1), multi element antenna (MIMO) technology such as Open Loop Spatial Multiplexing (OLSM) and Close Loop Spatial Multiplexing (CLSM) transmission are also specified by the 3GPP standard for LTE downlink transmission. According to LTE Release 9 there are 7 MIMO configurations from mode 2 to 8. An LTE base station is expected to select and switch among these transmission modes based on channel quality feedback like Channel Quality Indicator (CQI) . In this paper we have investigated the effect of different channel conditions at different SNR levels on the performance achieved through transmission mode 1 to 4 . The simulation output shows that the mode 3 and 4 which are open loop and close loop spatial multiplexing respectively using 4 transmitting antenna outperforms all other mode in terms of high throughput at very reasonable BLER.