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A 24 Mbit/s Red LED-based Visible Light Communication System Employing DCO-OFDM Modulation

机译:采用DCO-OFDM调制的基于24 Mbit / s红色LED的可见光通信系统

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摘要

In this paper, we present a 24 Mbit/s visible light communication (VLC) system based on red light emitting diode (LED). For VLC systems, intensity modulation with direct detection (IM/DD) is widely used, which means that the transmitted signal must be nonnegative and real-valued. In this system, we implemented the DCbiased optical orthogonal frequency division multiplexing (DCOOFDM) architecture and solved the synchronization problem in OFDM systems. In addition, the least square (LS) algorithm is used to estimate channel response. We add partial transmit sequence (PTS) and clipping method to reduce the problem of high peak-to-average power ratio (PAPR) in OFDM system. Bit error rates (BER) is zero under 15 cm free space transmission.
机译:在本文中,我们提出了一种基于红色发光二极管(LED)的24 Mbit / s可见光通信(VLC)系统。对于VLC系统,具有直接检测(IM / DD)的强度调制已被广泛使用,这意味着所传输的信号必须是非负的并且是实值。在该系统中,我们实现了DCbiased光学正交频分复用(DCOOFDM)体系结构,并解决了OFDM系统中的同步问题。另外,最小二乘(LS)算法用于估计信道响应。我们添加了部分发射序列(PTS)和限幅方法,以减少OFDM系统中高峰均功率比(PAPR)的问题。在15 cm自由空间传输下,误码率(BER)为零。

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