线型小区中V-BLAST两根分布发射天线的位置优化

在分布式发射天线多输入多输出(MIMO)系统中，不同的发射天线位置将影响系统的性能。针对这一问题，该文在考虑了传播时延、路径损耗、阴影衰落、小尺度衰落和高斯白噪声的基础上研究了V-BLAST两根分布式发射天线在线型小区的平均误码率(AABER)。理论分析表明存在一个关于小区中心对称的位置使得AABER性能最优，这一位置可以通过数值计算的方法得到。仿真结果验证了理论分析的正确性。

Optimal Antenna Location for V-BLAST with Two Distributed Transmit Antennas in Linear Cells

For Multiple-Input Multiple-Output (MIMO) space-time coding architecture with distributed transmit antennas, the location of transmit antennas will impact the system performance. To solve this problem, the area averaged bit error ratio (AABER) of V-BLAST with two distributed transmit antennas in a linear cell is studied, considering the effects of channel propagation delay, path loss, shadow fading, multipath fading and white Gaussian noise. Theoretical analyses show that the antennas should be located symmetrically about the cell center in order to achieve the best AABER. This location can be calculated by numerical method. Simulation results prove the correctness of the theoretical analysis.