基于反相对称法的空间分集技术  

Space Diversity Technology Based on Phase-Inversion Symmetric Method

作　　者：萧宝瑾[1] 郝乐乐[1] 

机构地区：[1]太原理工大学信息工程学院,太原030024

出　　处：《太原理工大学学报》2010年第3期245-247,共3页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(60872019)

摘　　要：针对相邻信道之间噪声存在相关性,使得现有的MIMO系统获得的信道容量总是达不到理论计算值的实际情况,将反相对称法与空间分集技术相结合,提出了一种基于反相对称法的空间分集技术,利用噪声的相关性来抑制噪声,提高输出信噪比。通过实际测试证明,当天线间距小于半波长时,噪声相关系数可以达到0.80以上。此时利用该技术可使系统输出信噪比提高9倍以上,仿真结果与理论分析基本吻合。Considering the real situation that the correlation between the adjacent channel noises results in a lowered channel capacity in existing MIMO systems under theoretical value,we combined the PISM with the spatial diversity technology and then proposed a PISM-based spatial diversity technology, which uses the noise correlation to supress the noise so as to improve the SNR of the output. And the antenna spacing could be smaller, providing a convenience for the application of the technology in the mobile devices. Through the actrual test, it was proved that while the antenna spacing is less than half the wavelength, the correlation coefficient of the noises in the adjacent space could reach 0.80 or above. This technology could increase the SNR of the system output 9 times or above. And the simulation result was consistent with the theoretical analysis.

关 键 词：反相对称法 分集 信噪比 调制 噪声相关性 

分 类 号：TN914.3[电子电信—通信与信息系统]