采用FPGA和软微处理器内核实现自适应数字预失真

2015 IEEE Advanced Information Technology, Electronic and Automation Control Conference (IAEAC) Pub Date : 2015-12-01 DOI:10.1109/IAEAC.2015.7428649

Qi Wang, Di He

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引用次数: 2

摘要

正交频分复用(OFDM)是利用发光二极管(LED)作为发射机提高可见光通信(VLC)传输数据速率的有效方法。然而，led发射机固有的非线性特性限制了VLC系统的性能。led的非线性会随着温度变化、器件老化等条件的变化而变化。本文实现了一种基于现场可编程门阵列(FPGA)及其软微处理器内核的OFDM VLC系统。在该系统中，采用预失真技术对LED的非线性进行了补偿，大大提高了VLC系统的性能。

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Adaptive digital predistortion implemented by FPGA and soft microprocessor core

Orthogonal frequency division multiplexing (OFDM) is an effective approach to enhance transmission data rate of the visible light communication (VLC) using a light emitting diode (LED) as the transmitter. However, the inherent nonlinearity of LEDs transmitter imposes performance limitations to the VLC systems. The nonlinearity of LEDs could be changed depending on the conditions of temperature variation, device aging and so on. In this paper, we realized an OFDM VLC system based on field-programmable-gate-array (FPGA) and its Soft Microprocessor Core. And in this system, the LED nonlinearity is compensated by the predistortion technique, which could greatly improve the performance of the VLC system.

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2015 IEEE Advanced Information Technology, Electronic and Automation Control Conference (IAEAC)

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