We investigate the adverse impact of pointing errors (PEs) on the efficiency of free-space optical communication under varied weather conditions using hybrid subcarrier intensity modulation over a fading regime. The error rate is improved by implementing topological permutations at the trans-receiver to achieve a bit error rate of 10 − 10. The derived combined probability density function expressions are defined as generalized infinite power series for precision, which supersedes Meijer-G. The outcomes are contrasted with BPSK-SIM and pulse position modulation, validating its agreement with favored aspects. The undesirable influence of PEs is balanced by widening the beam-waist at the expense of the received irradiance in a multiple-input-multiple-output, MIMO(2 × 2) system, until a normalized jitter cut-off of 3.35. Afterward, single-input-multiple-output, SIMO(1 × 3), emerges to be more reliable, providing the flexibility to select the optimum order concerning the quality of service.

中文翻译：

---

不同天气下FSO链路未对准混合高吞吐量MIMO系统的优化

我们在衰落状态下使用混合副载波强度调制，研究了指向误差 (PE) 在不同天气条件下对自由空间光通信效率的不利影响。通过在收发器处实施拓扑排列来提高误码率，以实现 10 - 10 的误码率。导出的组合概率密度函数表达式被定义为广义无限幂级数以提高精度，它取代了 Meijer-G。结果与 BPSK-SIM 和脉冲位置调制形成对比，验证其与有利方面的一致性。PE 的不良影响通过在多输入多输出 MIMO(2 × 2) 系统中以接收辐照度为代价加宽波束腰来平衡，直到归一化抖动截止值为 3.35。之后，