Toward real-time adaptive low-rank LMMSE channel estimation of MIMO-OFDM systems

Özdemir M. K., ARSLAN H., Arvas E.

IEEE Transactions on Wireless Communications, cilt.5, sa.10, ss.2675-2678, 2006 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 5 Sayı: 10
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1109/twc.2006.04713
  • Dergi Adı: IEEE Transactions on Wireless Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2675-2678
  • Anahtar Kelimeler: adaptive filtering, channel estimation, LMMSE, low-rank, MIMO, OFDM, subspace tracking, SVD
  • İstanbul Medipol Üniversitesi Adresli: Evet

Özet

For the practical LMMSE channel estimation of MIMO-OFDM systems, the high computational complexity of LMMSE needs to be eliminated. In this study, we develop a low-complexity, generalized low-rank LMMSE channel estimator for MIMO-OFDM systems using comb-type pilots. The estimator utilizes the relationship between the subspaces of the frequency domain channels at the pilots and non-pilots subcarriers. By then using subspace tracking, it is observed that practical LMMSE channel estimation of MIMO-OFDM systems can be feasible. © 2006 IEEE.