Title :
On channel estimation in OFDM systems
Author :
Van de Beek, Jan-Jaap ; Edfors, Ove ; Sandell, Magnus ; Wilson, Sarah Kate ; Borjesson, Per Ola
Author_Institution :
Div. of Signal Processing, Lulea Univ. of Technol., Sweden
Abstract :
The use of multi-amplitude signaling schemes in wireless OFDM systems requires the tracking of the fading radio channel. The paper addresses channel estimation based on time-domain channel statistics. Using a general model for a slowly fading channel, the authors present the MMSE and LS estimators and a method for modifications compromising between complexity and performance. The symbol error rate for a 18-QAM system is presented by means of simulation results. Depending upon estimator complexity, up to 4 dB in SNR can be gained over the LS estimator
Keywords :
computational complexity; error statistics; fading; frequency division multiplexing; land mobile radio; least mean squares methods; quadrature amplitude modulation; telecommunication signalling; time-domain analysis; time-varying channels; tracking; 18-QAM system; 4 dB; LS estimators; MMSE; OFDM systems; channel estimation; complexity; fading radio channel; multi-amplitude signaling schemes; performance; slowly fading channel; symbol error rate; time-domain channel statistics; tracking; Channel estimation; Digital TV; Digital audio broadcasting; Error analysis; Fading; Frequency division multiplexing; OFDM; Signal processing; Statistics; Time domain analysis;
Conference_Titel :
Vehicular Technology Conference, 1995 IEEE 45th
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-2742-X
DOI :
10.1109/VETEC.1995.504981
