【作者】 杨颖； 虞湘宾； 周婷婷； 刘晓帅； 殷馨；

【Author】 YANG ying;YU xiang-bin;ZHOU ting-ting;LIU xiao-shuai;YIN xin;College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics;

【机构】 南京航空航天大学电子信息工程学院；

【摘要】 在空时编码方案基础上,针对天线相关的情况,分析了多输入多输出(MIMO)系统误比特率性能。基于获得的有效信噪比及其统计特性,利用错误函数的近似关系式推导出系统误比特率的近似闭式表达式。所推公式大大简化已有精确表达式的计算,便于系统进行性能评估。仿真结果证明了所给理论分析是有效的。分析结果表明天线空间相关性越强,系统性能将越差,但是通过增加天线数可以降低相关性的影响。更多还原

【Abstract】 For the case of the correlation between the antennas,the performance of the bit error rate(BER)in the multiple-input multiple-output(MIMO)systems by the space-time coding(STC)scheme is analyzed. Based on the achieved effective signal-to-noise rate(SNR)and its statistical properties,the approximate close-formed expressions of BER are deduced by the approximation equations of the error function. The derived expressions can greatly simplify the calculation of the existing exact expressions,which are convenient to evaluate the system performance. The simulation results prove that the theoretical analysis is effective. The analysis results show that the stronger the spatial correlation between the antennas is,the poorer the system performance is,but the influence of correlation will be reduced by increasing the number of antennas.更多还原