  This paper provides a link and system level study of the downlink using OFDMA
techniques based on LTE systems. At the link level, the Block Error Rate (BLER)
performance curves are generated and 10 % points of BLER curves, calculated
under SISO AWGN channel, are considered as reference to generate the SNR-to-CQI
mapping. These mapping results are used in system level simulator (SLS) via
MIESM link to system interface. Then the UE throughput is evaluated by
considering proportional fair (PF), round robin (RR), and best CQI schedulers
at different values of UE throughput CDF. In this paper we analyze that the PF
scheduler outperforms other schedulers in fairness and average throughput,
while the best CQI scheduler performs good under high SINR region. The RR is
the best choice when resource allocation is to be done without considering any
kind of channel condition.
