Performance of Channel Estimation in MIMO-OFDM Systems
Abstract: This paper presented
the performance of faded channel estimation method on orthogonal frequency
division multiplexing-multiple input multiple outputs (OFDM-MIMO) i.e. least
squares (LS) and minimum mean squared error (MMSE). Channel impuls response
(CIR) was required to overcome the
intersymbol interference (ISI). Channel impuls response information was
obtained from channel estimation processing. Iterance simulation used monte-carlo
technique to determine the performance of bit error rate (BER) and mean squared
error (MSE). Simulation results show that the mean squared error performance on
MIMO system was better than the SISO system. On MMSE channel estimation, the
MIMO 2Tx-2Rx system provided ± 2 dB improvement that compared to SISO system at
value of MSE 10-2.Furthermore,MIMO 3Tx-2Rx produce improvement about 1.5 dB,
MIMO 4Tx-2Rx improve about 3.5 dB at BER 10-4,respectively.The MIMO 2Tx-2Rx
system, MMSE channel estimation produced better performance ± 1 dB than LS
channel estimation with sufficient SNR value for MSE 10-2 .Pilot arrangement,
the simulation results show that the block type-pilot arrangement produced
better performance than the comb type-pilot arrangement at fast fading channel.
Block type-pilot arrangement system produced better ± 10 dB than the comb
type-pilot arrangement with MMSE method at value of BER 2 10-2.
Author: Subuh Pramono, Eddy
Triyono
Journal Code: jptkomputergg130058
