Recently proposed splitting receivers, utilizing both coherently and non-coherently processed signals for detection, have demonstrated remarkable performance gain compared to conventional receivers in the single-antenna scenario. In this paper, we propose a multi-antenna splitting receiver, where the received signal at each antenna is split into an envelope detection (ED) branch and a coherent detection (CD) branch, and the processed signals from both branches of all antennas are then jointly utilized for recovering the transmitted information. We derive a closed-form approximation of the achievable mutual information (MI) in terms of the key receiver design parameters, including the power splitting ratio at each antenna and the signal combining coefficients from all the ED and CD branches. We further optimize these receiver design parameters and demonstrate important design insights for the proposed multi-antenna ED-CD splitting receiver: 1) the optimal splitting ratio is identical at each antenna, and 2) the optimal combining coefficients for the ED and CD branches are the same, and each coefficient is proportional to the corresponding antenna's channel power gain. Our numerical results also demonstrate the MI performance improvement of the proposed receiver over conventional non-splitting receivers.
翻译:最近提出的分解接收器使用一致和非一致处理的探测信号,与单一天文情景下的传统接收器相比,最近提出的分解接收器表现显著。在本文件中,我们提议一个多天线分解接收器,将每个天线接收的信号分成一个信封检测分支和一个连贯的检测分支,然后将所有天线两个分支的经处理信号共同用于恢复传送的信息。我们从关键接收器设计参数方面得出可实现的相互信息(MI)的封闭式近似值,包括每个天线的分电比率和所有天线和CD分支的系数组合信号。我们进一步优化这些接收器设计参数,并展示拟议的多天文ED-CD分解接收器的重要设计洞察力:(1)每个天线的最佳分解率相同,和2 ED和CD分支的最佳组合系数相同,每个系数与相应的天线电流能量增益成比例。我们的数字结果还表明,拟议的接收器相对于常规非分割接收器的业绩改进。</s>