摘要
为了充分利用多天线系统的性能增益,通过研究集中式MIMO(Multiple input multiple output)系统中最大化最小后验SNR(Signal to noise ratio)准则的局限性,提出了一种低复杂度的基于线性离散码的发射天线选择方案。然后分析了分布式MIMO系统中,移动台距不同基站间不同的大尺度衰落对信道特征值的影响,证明了所提天线选择准则在分布式系统中的有效性。仿真结果表明,在准静态信道环境下,所提天线选择准则具有比最大化最小后验SNR准则更好的性能,并且复杂度更低。
In an effort to utilize advantages of using multiple antennas, the transmit antenna selection with low complexity for linear dispersion codes is proposed by researching the disadvantages of the max-min post-SNR criterion in centralized multiple input multiple output（MIMO） systems. And then the validity of the proposed criterion in distributed MIMO systems is interpreted by analyzing the eigenvalues of channel affected by different large scale fading. Simulation results show that the proposed criterion outperforms the max-min post-SNR criterion over a slowly varying channel with the lower complexity.
出处
《数据采集与处理》
CSCD
北大核心
2010年第2期148-153,共6页
Journal of Data Acquisition and Processing
基金
国家自然科学基金(60572066)资助项目
关键词
无线通信技术
天线选择
线性离散码
迫零接收机
wireless communication technology
antenna selection
linear dispersion codes （LDCs）
zero forcing receiver
