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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)。
In the LTE-A (Long Term Evolution-Advanced), mobile station MS (Mobile Station) requires uplink data to be transmitted in dual antennas and three slots, which makes space-time block code for LTE There is a new point of application. Based on the traditional Space-Time Block Coding (STBC), this paper proposes a new transmission scheme through improvement, which makes the data transmission using dual transmit antennas in three slots. The scheme features: (1) It can achieve the full rate and full diversity of transmission; (2) Its Maximum Likelihood (ML) needs to combine three real signals; (3) Its minimum determinant value And did not change by the change of signal constellation; (4) It is compatible with the mode of single antenna transmission. The simulation results show that the proposed scheme has a better bit error rate (BER) than the traditional quasi-orthogonal space-time block codes QSTBC scheme and Alamouti scheme under the same signal-to-noise ratio (SNR).