A simple channel tracking scheme using deductive combining for MIMO-OFDM WLANs

抄録

This letter proposes a simple tracking scheme for time-varying channels of IEEE 802.11 based MIMO-OFDM wireless LANs. The scheme combines a tentative channel estimate derived from a transmitted symbol replica with the channel estimate used to generate the replica. The propose scheme requires no prior knowledge on the statistics of the channel and instead uses a deductive approach to calculate weights to combine the channel estimates. The numerical results show the proposed scheme performs 1.0 dB CNR gain at FER of 10⁻² over the conventional scheme for 3 × 3 MIMO and 64QAM when receiver velocity is 4 km/h.