Visible light communication (VLC) systems have attracted considerable attention in recent years. However, it still faces the challenges of user mobility and random device orientation, which will result in unreliable connection and performance degradation. In this letter, we propose a group-based LED selection aided generalized spatial modulation (GLS-GSM) scheme to tackle this issue by preventing some poor LEDs from communication. Firstly, the LEDs are divided into several equal-sized groups. Then, each group conducts Euclidean distance-based LED selection (ED-LS) and spatial modulation (SM) independently. Moreover, an ED-based grouping criterion is exploited to search for an optimal grouping strategy. The bit error rate (BER) performance of the proposed scheme is evaluated for sitting and walking activities. Numerical simulation results demonstrate the effectiveness of the proposed method.

中文翻译：

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用于可见光通信中广义空间调制的基于组的 LED 选择

近年来，可见光通信（VLC）系统引起了相当大的关注。然而，它仍然面临用户移动性和随机设备定向的挑战，这将导致连接不可靠和性能下降。在这封信中，我们提出了一种基于组的 LED 选择辅助广义空间调制 (GLS-GSM) 方案，以通过防止一些不良 LED 进行通信来解决这个问题。首先，LED 被分成几个大小相等的组。然后，每组独立进行基于欧几里德距离的 LED 选择 (ED-LS) 和空间调制 (SM)。此外，利用基于 ED 的分组标准来搜索最佳分组策略。所提出方案的误码率 (BER) 性能针对坐着和步行活动进行评估。