中兴通讯技术
中興通訊技術
중흥통신기술
ZHONGXING TELECOM TECHNOLOGY
2014年
6期
25-28
,共4页
可见光通信%星座图设计%多色发光二极管%色移键控
可見光通信%星座圖設計%多色髮光二極管%色移鍵控
가견광통신%성좌도설계%다색발광이겁관%색이건공
optical wireless communication%constel ation design%multicolor LED%color shift keying
提出了一种针对广义色移键控（CSK）调制RGB 3色发光二极管（LED）的可见光通信（VLC）星座图设计方法。为了实现通信与照明的结合，考虑了一些照明条件的约束：首先，LED产生的颜色和强度被限制以达到照明要求；其次，为了减小非线性效应的影响，每盏LED灯的功率被限制在线性范围；最后，利用奇异值分解（SVD）的预均衡来消除多径效应的影响和颜色间的干扰。仿真结果表明，相比较于每路LED分别采用开关键控（OOK）调制的误码率，优化的星座图性能更优。
提齣瞭一種針對廣義色移鍵控（CSK）調製RGB 3色髮光二極管（LED）的可見光通信（VLC）星座圖設計方法。為瞭實現通信與照明的結閤，攷慮瞭一些照明條件的約束：首先，LED產生的顏色和彊度被限製以達到照明要求；其次，為瞭減小非線性效應的影響，每盞LED燈的功率被限製在線性範圍；最後，利用奇異值分解（SVD）的預均衡來消除多徑效應的影響和顏色間的榦擾。倣真結果錶明，相比較于每路LED分彆採用開關鍵控（OOK）調製的誤碼率，優化的星座圖性能更優。
제출료일충침대엄의색이건공（CSK）조제RGB 3색발광이겁관（LED）적가견광통신（VLC）성좌도설계방법。위료실현통신여조명적결합，고필료일사조명조건적약속：수선，LED산생적안색화강도피한제이체도조명요구；기차，위료감소비선성효응적영향，매잔LED등적공솔피한제재선성범위；최후，이용기이치분해（SVD）적예균형래소제다경효응적영향화안색간적간우。방진결과표명，상비교우매로LED분별채용개관건공（OOK）조제적오마솔，우화적성좌도성능경우。
In this paper, we propose a constel ation design that uses RGB LEDs modulated by generalized color-shift keying (CSK) modulation to realize visible light communication (VLC). To achieve joint communication and il umination, we consider constraining some lighting conditions. First, the average color and power are constrained to meet the lighting requirements. Second, to minimize nonlinear effects, the power of each LED is constrained in its linear range. Third, a singular value decomposition (SVD)-based pre-equalizer is employed to mitigate the effects of multi-path and cross-talk between colors. Simulation results show that the bit-error rate of the proposed scheme is lower than that of a conventional scheme where OOK is used for each branch.
