可見光通信中的無(wú)載波位相調(diào)制技術(shù)

吳楠; 王旭東; 姚凱莉; 蓋新東; 何榮希

doi:10.11999/JEIT160343

可見光通信中的無(wú)載波位相調(diào)制技術(shù)

doi: 10.11999/JEIT160343

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61371091)

計(jì)量
- 文章訪問(wèn)數(shù): 1273
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-04-11
- 修回日期: 2016-08-29
- 刊出日期: 2017-02-19

Carrier-less Position/Phase Modulation forVisible Light Communications

Funds:

The National Natural Science Foundation of China (61371091)

摘要

摘要: 為了保證可見光通信(VLC)系統(tǒng)能夠?yàn)橹悄芙K端提供高速率、低能耗的數(shù)據(jù)傳輸服務(wù)。該文基于脈沖位置調(diào)制(PPM)技術(shù)，提出了一種新型的無(wú)載波位相(CPP)調(diào)制技術(shù)，即通過(guò)運(yùn)用正交濾波器提高了PPM的傳輸速率。而針對(duì)采用CPP調(diào)制在VLC系統(tǒng)中功率效率顯著降低的問(wèn)題，提出了全新的時(shí)變偏置有效地降低了系統(tǒng)的功耗。最后仿真結(jié)果表明，采用時(shí)變偏置的CPP系統(tǒng)同采用直流偏置相比，在獲得相同BER性能且?guī)捠芟薜那闆r下可以節(jié)省2 dB的信噪比。而同時(shí)考慮信號(hào)時(shí)隙之間的相關(guān)性，時(shí)變偏置可以進(jìn)一步提升約1.5 dB的BER性能。
- 可見光通信 /
- 脈沖位置調(diào)制 /
- 無(wú)載波位相 /
- 時(shí)變偏置
Abstract: In order to guarantee that Visible Light Communication (VLC) can provide both high-speed and low energy consumption data transmission services. A modulation named by Carrier-less Position/Phase (CPP) based on Pulse Position Modulation (PPM) is proposed. By utilizing the orthogonal filters, the transmission rate of the PPM is improved. According to that employing CPP modulation in VLC makes power efficiency significantly reduced, a novel variable bias is presented as an effort to reduce the power consumption effectively. Finally, the simulation results illustrate that applying the proposed variable bias to CPP scheme, compared to DC bias, the new scheme can save 2 dB of SNR to obtain the same BER performance under the bandwidth constrained conditions. After further considering slots correlation, the variable bias can further improve the BER performance by 1.5 dB.
- Visible Light Communications (VLC) /
- Pulse Position Modulation (PPM) /
- Carrier-less Position/Phase (CPP) /
- Variable bias

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參考文獻(xiàn)(20)

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