一种面向长期演进的空时分组传输方案

移动基站MS（Mobile Station）在LTE-A（Long Term Evolution-Advanced长期演进）协议中要求上行链路的数据要在双天线和三个时隙中传输,这就使得针对LTE的空时分组码有了一个新的应用点.本文在传统的STBC（Space-Time Block Coding空时分组码）的基础上,通过改进,提出一种新的传输方案,使得数据实现在三个时隙使用双发射天线的传输.该方案特点：（1）它可以实现传输的全速率和全分集；（2）它的最大似然译码（Maximum Likelihood,ML）需要联合三个实信号；（3）它的最小行列式值并没有通过信号星座图的改变而变化；（4）它与单天线传输的模式相兼容.仿真结果显示提出的方案比传统的准正交空时分组码QSTBC方案和Alamouti方案在相同信噪比（SNR）的情况下有着更好的误比特率（BER）.

A New STBC Scheme for LTE-A

The Mobile Station requests data transmitted by dual antennas and three time slots in the LTE -Advanced. This is a new application for the LTE -Advanced space -time block codes. This paper proposes a new space - time block code transmitted between the three slots and dual transmit antennas. The proposed STBC scheme has three properties. First, the scheme can achieve full rate and full diversity . Second, the maximum likelihood decoding joint three real symbols. Third, its minimum determinant value did not change by the signal constellation diagram. Forth, it can be compatible with the single antenna transmission mode. Simulation results show that the proposed scheme have better bit error rate （BER） in the case of the same signal - to - noise ratio （SNR） than the traditional quasi orthogonal space -time block codes QSTBC scheme and the Alamouti scheme.