Title :
Channel estimation for wireless OFDM systems
Author :
Jones, V.I. ; Raleigh, Gregory G.
Author_Institution :
Clarity Wireless Inc., Belmont, CA, USA
Abstract :
A channel estimation technique is developed for an OFDM system with multiple transmit and multiple receive antennas. The approach exploits the channel structure in the time domain and the frequency domain. The method is appropriate for OFDM systems operating in a time varying channel. A multi-input-multi-output OFDM (MOFDM) system model is defined, followed by a proposed excitation strategy for sufficient identification of the channel. The estimation strategy is shown to be optimal within the class of linear MMSE estimators. Experimental results of the algorithm are provided
Keywords :
MIMO systems; OFDM modulation; least mean squares methods; parameter estimation; radiocommunication; receiving antennas; time-varying channels; transmitting antennas; MIMO channel model; MOFDM system model; SISO estimator; algorithm; channel estimation; channel identification; channel structure; excitation strategy; experimental results; frequency domain; linear MMSE estimators; multi-input-multi-output system model; multiple receive antennas; multiple transmit antennas; optimal estimation; time domain; time varying channel; wireless OFDM systems; Channel estimation; Delay; Fading; Filtering; Filters; OFDM; Random processes; Receiving antennas; Reflection; Transmitting antennas;
Conference_Titel :
Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE
Conference_Location :
Sydney,NSW
Print_ISBN :
0-7803-4984-9
DOI :
10.1109/GLOCOM.1998.776875
