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《Science Technology and Engineering》 2014-17
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A Simplified Calculation Method for ELMMSE Channel Estimation Algorithm

LI Qi;MA Xiu-rong;SHI Qing-xiang;GAO Pei-fang;School of Computer and Communication Engineering,Engineering Research Center of Communication Devices Ministry of Education,Tianjin Key Laboratory of Film Electronic and Communication Devices,Tianjin University of Technology;  
A simplified calculation method for channel estimation is proposed based on the Equivalent Linear Minimum Mean Square Error( ELMMSE) criterion. In order to simplify the calculation complexity of ELMMSE algorithm,at first,the algorithm is simplified by using the inherent property of the channel autocorrelation matrix;then,due to the inverse matrix meeting the characteristic of Hermitian Toeplitz,the complexity of inverse matrix is simplified. Simulation results show that,compared with the contrast ELMMSE algorithms,the computing times of complex multiplication and complex addition are reduced to 5. 84% and 5. 79% respectively. In particular,the computing times of complex multiplication and complex addition in solving autocorrelation matrix are reduced by33. 14% and 16. 64% respectively. When solving the inverse matrix,both the computing times of complex multiplication and complex addition are reduced from o( N3) to o( N2).
【Fund】: 天津市科技创新专项资金项目(10FDZDGX00400)资助
【CateGory Index】: TN911.23
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