A channel estimation scheme for MIMO-OFDM systems

2nd Annual International Conference on Information System and Artificial Intelligence

物理学;计算机科学

He, Chunlong^1 ; Tian, Chu^1 ; Li, Xingquan^1 ; Zhang, Ce^1 ; Zhang, Shiqi^1 ; Liu, Chaowen^1

College of Information Engineering, Shenzhen University, Shenzhen, China^1

关键词: Bit error rate (BER) performance;    Channel estimation method;    Least squares channel estimation;    Linear minimum mean square error(LMMSE);    MIMO OFDM channel estimation;    Multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM);    Orthogonal training sequences;    Single input single output;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/887/1/012039/pdf
DOI  :  10.1088/1742-6596/887/1/012039

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

In view of the contradiction of the time-domain least squares (LS) channel estimation performance and the practical realization complexity, a reduced complexity channel estimation method for multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) based on pilot is obtained. This approach can transform the complexity of MIMO-OFDM channel estimation problem into a simple single input single output-orthogonal frequency division multiplexing (SISO-OFDM) channel estimation problem and therefore there is no need for large matrix pseudo-inverse, which greatly reduces the complexity of algorithms. Simulation results show that the bit error rate (BER) performance of the obtained method with time orthogonal training sequences and linear minimum mean square error (LMMSE) criteria is better than that of time-domain LS estimator and nearly optimal performance.