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The past decade has witnessed a rapid development of VLC technologies. However, the spectral efficiency has to be improved and the robustness enhanced, especially in dynamic lighting conditions. This article proposes an analog rateless code (ARC) modulation scheme for VLC in a hybrid VLC-RF system. The ARC uses a variable-length low-density random projection matrix to map a block of bits into a virtually...
In this paper we design a backhaul scheme for uplink cooperation, which is based on distributed source coding (DSC). With this backhaul scheme, base stations cooperatively serve the cell edge users in order to improve their performance. In cooperative uplink, both cooperating BS and serving BS receive signal from cell edge users, the cooperating BS decodes cell edge users firstly, and sends the syndrome...
A mine-water level sensor system into the utility model of infrared control modules, and gives the design of hardware and software modules. The program has a simple structure, high precision, good linearity, etc., for its detection and control of coal mine water storage will greatly facilitate the provision of water. It is of great value.
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