A MIMO-OFDM based location algorithm in LTE system

In order to improve the location accuracy in “urban canyons” and indoor environments, a new algorithm based on MIMO-OFDM technique is proposed. Firstly, the error rate of the subcarriers in the OFDM signal is reduced by the transmitter diversity and maximum ratio combining in MIMO ; and then the operation of cross-correlation between the received signal and reference signal is processed to obtain the time delay estimation; finally, we use the time delay to realize the location. The simulation results show that the location accuracy in proposed algorithm is improved about 25 m compared to the reference algorithm in the cumulative distribution probability of 90%.