Title :
A Low Complexity Channel Estimation Method for MIMO-OFDM Systems
Author :
Huo, Wenjun ; Wang, Zhigang ; Li, Shentang
Author_Institution :
Inst. of Inf. Eng., Inf. Eng. Univ., Zhengzhou
Abstract :
A method of channel estimation based on training sequences is proposed for MIMO-OFDM systems. Moreover, the criterion is derived by simplified means for optimum training sequences construction. Based on the criterion, two methods are proposed for construction of optimum training sequences. Computer simulations are conducted to evaluate the channel estimation and optimum training sequences construction methods for TU and HT delay profiles. Simulation results show that the proposed channel estimation method has the same estimation accuracy as the traditional methods. However, the computational complexity is reduced greatly. It is also shown that the optimum training sequences constructed by the Hadamard matrix enhance channel estimation with the estimation accuracy improvement by 2dB.
Keywords :
Hadamard matrices; MIMO communication; OFDM modulation; channel estimation; Hadamard matrix; MIMO-OFDM systems; complexity channel estimation method; computational complexity; optimum training sequences construction methods; Channel estimation; Computational complexity; Decoding; Intersymbol interference; MIMO; OFDM; Programmable logic arrays; Receiving antennas; Transmitters; Transmitting antennas;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
DOI :
10.1109/WICOM.2007.14
