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OFDM and Generalized LED Based on Index Modulation for Optical MIMO System

机译:基于光学MIMO系统索引调制的OFDM和广义LED

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Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is an extension of the traditional OFDM modulation scheme. Its key idea is to adopt the activated subcarrier index to carry extra information. In this paper, we propose a new optical multi-input multiple-output (MIMO) visible light communication (VLC) system based on OFDM-IM and generalized light-emitting diode (LED) index modulation (GLIM). The proposed scheme utilizes the subcarrier index selection to improve the system flexibility and adopts the LED index modulation to increase the spectral efficiency, which also avoids the Hermitian symmetry processing. Simulation results show that the proposed scheme achieves better bit error rate (BER) performance than the traditional GLIM scheme. Moreover, the proposed scheme can flexibly select the number of the active subcarriers according to the channel condition and ensure better system performance.
机译:具有索引调制(OFDM-IM)的正交频分复用是传统OFDM调制方案的扩展。 其关键的想法是采用激活的子载波索引来携带额外信息。 在本文中,我们提出了一种基于OFDM-IM和广义发光二极管(LED)索引调制(GLIM)的新的光学多输入多输出(MIMO)可见光通信(VLC)系统。 该方案利用子载波指数选择来提高系统灵活性,采用LED指标调制来提高频谱效率,这也避免了隐士对称处理。 仿真结果表明,该方案比传统的光泽方案实现了更好的误码率(BER)性能。 此外,所提出的方案可以根据信道条件灵活地选择有源子载波的数量,并确保更好的系统性能。

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