本文提出了一种集成主动智能表面（RIS）与混合OCDMA-NOMA接入的6G自由空间光通信架构，有效克服传统被动RIS的双路径损耗问题，并通过块坐标下降算法优化系统参数，在Gamma-Gamma大气湍流环境下实现低误码率和高频谱效率，为6G高容量可靠光无线网络奠定基础。

Video frames are uniformly sampled from each video. A pretrained InternVL image encoder is used as a frozen visual backbone. Only visual (single-modality) features are extracted, without language ...