Recursive MMSE channel estimation for MIMO-OFDM systems
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Simplified Semi-Blind Channel Estimation for Space---Time Coded MIMO-OFDM Systems
Wireless Personal Communications: An International Journal
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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 using subspace tracking, it is observed that practical LMMSE channel estimation of MIMO-OFDM systems can be feasible