Complexity Reduction for Time Variant Channel Estimation in 3GPP LTE Downlink
Sprache des Titels:
Englisch
Original Buchtitel:
Proc. of the 11th International Conference on Telecommunications (ConTEL 2011)
Original Kurzfassung:
The Basis Expansion Model (BEM) is often employed
to track the time variant multipath channels. Using an
accurate estimation of the Doppler spread for the BEM gives
better channel tracking performance for very high speed vehicles
[1].We propose a modification of the conventional BEM for 3GPP
LTE systems which is independent from the Doppler spread for
all realistic speeds. It shows no significant loss of estimation
accuracy compared to conventional BEM, thus providing a
robust channel tracking for mobile equipment under changing
multipath environment with the additional advantage of very low
computational complexity. Simulation results of Mean Squared
Error (MSE) are provided to support our claim.
Index Terms?Channel estimation, doubly selective channel,
basis expansion model (BEM), orthogonal frequency division
multiplexing (OFDM), long term evolution (LTE)
Forschungs-