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.
Description:
This thesis submitted in partial fulfillment of the requirements for the degree of Masters of Science in Telecommunication Engineering of East West University, Dhaka, Bangladesh