摘要
可见光通信是一种工作在可见光光谱范围内的新兴高速短距离通信技术。将白光LED作为光源的光无线网络中,通常使用强度调制/直接检测方式,忽略了信号的频率和相位信息,导致光无线信道的空间相关性比传统无线信道大得多。分析了影响光多输入多输出(MIMO)信道相关性的因素,并通过仿真验证了在特定条件下各因素对信道相关性产生影响的方式。在特定的场景内,根据信噪比和信道相关性的共同影响获得了最佳的收发端参数设置,从而得到了最佳的误码率性能。
Visible light communication is a burgeoning technology that uses the visible spectrum for high-speed short-range data communications. Intensity modulation/direct detection is predominantly used in optical wireless in which white LEDs serve as transmitters, neglecting frequency and phase of signal. Therefore correlation in optical channel is much larger than that in radio frequency channel, The factors which influence the correlation of the optical multiple-input multiple-output （MIMO） channel are analyzed, and the way these factors influence the channel correlation is validated through simulation. According to the mutual influence of signal-to-noise rate and channel correlation, optimal parameters can be obtained in specific scene for optimal bit error rate.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2013年第9期23-28,共6页
Acta Optica Sinica
基金
国家863计划(2013AA013603)
关键词
光通信
信道相关
多输入多输出
白光LED
optical communications
channel correlation
multiple-input multiple-output
white LED
