可见光通信的信道编码研究

发布时间：2018-04-18 19:16

本文选题：可见光通信 + 信道编码　；参考：《吉林大学》2014年硕士论文

【摘要】：可见光通信技术，在发明了白光LED，以及白光LED被广泛成为新一代的照明光源后，快速发展起来，正在走向实用化前景的光通信技术。在这项技术中，白光LED一种器件起到两种作用：作为光源进行室内照明作用以及作为可见光通信的通信光源。室内可见光通信系统正是这一应用的实际情况。与传统的红外光通信手段或者激光通信等光通信手段相比较而言，可见光通信拥有其他通信手段不具备的很多优点，我们可以预见到，可见光通信系统将会得到更广泛实际应用。由于可见光通信中可能会受到诸多噪音干扰，信道编码作为重要的通信纠错手段，得到了广泛重视。本文介绍了可见光通信的一些基础知识，在此基础上讨论了几种常用的信道编码方式，包括RS码，，卷积码以及TURBO编码等。探讨了可见光通信中信道编码技术的要求，并从中选取了RS码与卷积码形成级联码,应用在可见光通信中。经仿真实验表明，这种级联码在可见光通信中应用的效果好于单一编码技术，其误码率与编码增益都有一定提高。在误码率超过10-4时，可提高编码增益达到1.5dB以上，在信噪比一定时也可以降低误码率，纠错能力也有较大提升。因此，这种级联码更适合可见光通信的实际应用要求。
[Abstract]:The visible light communication technology, after the invention of white light LED and white light LED has been widely used as a new generation of lighting light source, has developed rapidly and is moving towards the practical prospect of optical communication technology.In this technology, a white LED device plays two roles: as a light source for indoor lighting and as a communication light source for visible light communication.The indoor visible light communication system is exactly the actual situation of this application.Compared with traditional infrared communication means or optical communication means such as laser communication, visible light communication has many advantages that other means of communication do not have. We can foresee that,Visible light communication system will be more widely used in practice.Due to the possible noise interference in visible light communication, channel coding, as an important means of communication error correction, has been paid more and more attention.This paper introduces some basic knowledge of visible light communication, and discusses several common channel coding methods, including RS code, convolutional code and TURBO coding.This paper discusses the requirements of channel coding technology in visible light communication, and selects RS code and convolutional code to form concatenated codes, which are used in visible light communication.The simulation results show that the concatenated code is more effective than the single coding technique in visible light communication, and its bit error rate and coding gain are improved to some extent.When the BER is higher than 10-4, the coding gain can be increased to more than 1.5dB, and the BER can be reduced when the SNR is constant, and the error-correcting ability is also greatly improved.Therefore, this concatenated code is more suitable for the practical application of visible light communication.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.1

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