System Simulation of WiMAX OFDMA- MIMO Downlink
channel for Wireless applications
K.Meena alias Jeyanthi1, Dr.A.P.Kabilan2,
1 Department of
Electronics and communication,PSNACET,Dindigul.
2Principal,Chettinad college
of engineering & technology, Karur
Received May
8, 2009
IEEE
802.16 is an emerging global broadband wireless access standard capable of
delivering multiple megabytes of shared data throughput supporting fixed,
portable and mobile operations. WiMAX represents a scalable and cost-effective
solution to offer wider area coverage, improved performance in terms of QOS,
service continuity in case of terrestrial network failure and long range user
mobility. The ever increasing demand of OFDMA and MIMO , plays a major role in
multiuser and multicarrier frame work. We propose a suboptimal, subcarrier
allocation criteria for OFDMA-MIMO systems. The computational complexity grows
linearly with the number of users and the number of sub carriers. Numerical
results are presented to compare the two sub carrier allocation criteria with
the optimal criterion. It is observed that BER and FER approaches rapidly for
lower energy to noise ratio.