發(fā)布時(shí)間：2018-04-18 19:16

  本文選題：可見光通信 + 信道編碼��； 參考：《吉林大學(xué)》2014年碩士論文

【摘要】：可見光通信技術(shù)，在發(fā)明了白光LED，以及白光LED被廣泛成為新一代的照明光源后，快速發(fā)展起來，正在走向?qū)嵱没�前景的光通信技術(shù)。在這項(xiàng)技術(shù)中，白光LED一種器件起到兩種作用：作為光源進(jìn)行室內(nèi)照明作用以及作為可見光通信的通信光源。室內(nèi)可見光通信系統(tǒng)正是這一應(yīng)用的實(shí)際情況。與傳統(tǒng)的紅外光通信手段或者激光通信等光通信手段相比較而言，可見光通信擁有其他通信手段不具備的很多優(yōu)點(diǎn)，我們可以預(yù)見到，可見光通信系統(tǒng)將會(huì)得到更廣泛實(shí)際應(yīng)用。 由于可見光通信中可能會(huì)受到諸多噪音干擾，信道編碼作為重要的通信糾錯(cuò)手段，得到了廣泛重視。本文介紹了可見光通信的一些基礎(chǔ)知識(shí)，在此基礎(chǔ)上討論了幾種常用的信道編碼方式，包括RS碼，，卷積碼以及TURBO編碼等。探討了可見光通信中信道編碼技術(shù)的要求，并從中選取了RS碼與卷積碼形成級(jí)聯(lián)碼,應(yīng)用在可見光通信中。經(jīng)仿真實(shí)驗(yàn)表明，這種級(jí)聯(lián)碼在可見光通信中應(yīng)用的效果好于單一編碼技術(shù)，其誤碼率與編碼增益都有一定提高。在誤碼率超過10-4時(shí)，可提高編碼增益達(dá)到1.5dB以上，在信噪比一定時(shí)也可以降低誤碼率，糾錯(cuò)能力也有較大提升。因此，這種級(jí)聯(lián)碼更適合可見光通信的實(shí)際應(yīng)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.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.1

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本文編號(hào)：1769695