Title :
Analysis of pilot-symbol aided channel estimation for MIMO-OFDM systems
Author :
Han Zhang ; Jiming Chen ; Youxi Tang ; Shaoqian Li
Author_Institution :
Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, China
Abstract :
Multiple transmit and receive antennas can be used to form multiple-input multiple-output (MIMO) channels to increase the capacity by a factor of the minimum number of transmit and receive antennas. Orthogonal frequency division multiplexing (OFDM) for MIMO channels (MIMO-OFDM) can improve the performance by mitigating intersymbol interference and enhancing system capacity. The paper investigates pilot-symbol aided channel estimation (PSACE) for MIMO-OFDM systems. Two approaches are investigated: first, zero pilot patterns use all available pilot symbols simultaneously; second, a nonzero pilot pattern is allocated for each transmit antenna exclusively. The Wiener filters are derived for both approaches.
Keywords :
MIMO systems; OFDM modulation; Wiener filters; channel capacity; channel estimation; fading channels; interference suppression; intersymbol interference; receiving antennas; transmitting antennas; MIMO channels; MIMO-OFDM systems; Wiener filters; fading channel; intersymbol interference; nonzero pilot patterns; orthogonal frequency division multiplexing; pilot-symbol aided channel estimation; receive antennas; system capacity; transmit antennas; zero pilot patterns; Channel estimation; Fading; Intersymbol interference; MIMO; OFDM; Receiving antennas; Sampling methods; Transmitting antennas; Wiener filter; Wireless communication;
Conference_Titel :
Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
0-7803-8647-7
DOI :
10.1109/ICCCAS.2004.1346070
