Low complexity down-sampled MMSE (DMMSE) channel estimation for downlink OFDMA IEEE 802.16e system

@article{Galih2009LowCD,
  title={Low complexity down-sampled MMSE (DMMSE) channel estimation for downlink OFDMA IEEE 802.16e system},
  author={Savitri Galih and Riafeni Karlina and Fifin Nugroho and Ade Irawan and Trio Adiono and Adit Kurniawan},
  journal={2009 3rd IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications},
  year={2009},
  pages={273-277}
}
In this paper, we present low complexity down-sampled MMSE channel estimation. We reduced MMSE channel estimation complexity by downsampling the MMSE weight matrix. The simulation results show that the bit error rate (BER) performance significantly improved over the leasr square channel estimation and has comparable BER performance with MMSE channel estimation at low SNR with significant decrease i.e 57 % decrease in computational complexity. 

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