| LTE (Long Term Evolution) is the evolution of 3G (3rd-Generation) project. Compared with the traditional mobile technology, users can get more rapid, convenient and efficient application experience.The spectrum of LTE is very flexible and the technical implementation is very simple. Therefore LTE is confirmed as the main evolution technology of next generation mobile communication technology. LTE has so many advantages which is many operators'common choose. MIMO technology is widely used in the LTE system; MIMO can significantly improve system throughput and spectral efficiency.The interference between users can be eliminate by Block Diagonalization precoding in Multi-user MIMO system.But there are some contraints about the number of transmit and receive antennas which brings some difficulties and limitations of the system design.Based on existing research and the combination of MIMO, this paper studied the pre-coding scheme based on signal to leakage and noise ratio (SLNR).Compared to the block diagonalization precoding,signal to leakage noise ratio pre-coding algorithm overcomes the difficulties of the number of transmit and receive antennas. Based on signal to leakage and noise ratio (SLNR) and THP precoding scheme,this paper also studied a new pre-coding scheme.And the simulation result shows that the scheme has more satisfactory result in the error rate. |
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