This paper discusses the geometrical features and wideband performance of the beam with maximal ratio combining coefficients for a generic multi-antenna receiver. In particular, in case the channel is a linear combination of plane waves, we show that such a beam can be decomposed in a linear combination of beams pointed in the direction of each plane wave, and we compute how many directions can be effectively utilized. This highlights that such beam is better exploiting the spatial diversity provided by the channel, and therefore it is expected to be more robust to disruptions. Moreover, we compute the achieved Signal-to-Noise-Ratio for a wideband receiver, showing that it is not significantly worse than for other methods. Finally, we provide some insights on the robustness of the method by simulating the impact of the blockage of one multipath components.

翻译：本文讨论了一般多天线接收机中具有最大比合并系数的波束的几何特征和宽带性能。特别地，当信道为平面波的线性组合时，我们证明该波束可分解为指向各平面波方向的波束的线性组合，并计算了实际可有效利用的方向数目。这表明该波束能更好地利用信道提供的空间分集，因此预期对干扰具有更强的鲁棒性。此外，我们计算了宽带接收机所实现的信噪比，表明其性能并未显著劣于其他方法。最后，通过模拟多径分量阻断的影响，我们提供了该方法鲁棒性的若干见解。