A Cumulant-Based Adaptive Detection Technique for Optical Wireless Communication Over Strong Turbulence Channels  

作　　者：Wang, Jin Huang, Dexiu Yuan, Xiuhua 

机构地区：[1]Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

出　　处：《China Communications》2008年第1期22-27,共6页中国通信（英文版）

摘　　要：The optical wireless communication (OWC) is afading channel because of the effect of atmosphericattenuation. We introduce a cumulant-based adaptive detection technique to providehigh performance for OWC. The received signalof OWC over strong turbulence channels is assumedto be a mixture of K-distributed fading andGaussian distributed thermal noise. In order tomitigate the fading induced by turbulence, thedecision threshold-updating algorithm based onsecond and higher order cumulants is proposed,which is able to operate in an unknown turbulenceenvironment. The performance of the adaptiveprocessing scheme has been evaluated by meansof Monte Carlo simulations. It is shown that theproposed approach proves valuable for a limitednumber K of memory data.The optical wireless communication (OWC) is a fading channel because of the effect of atmospheric attenuation. We introduce a cumulant-based adaptive detection technique to provide high performance for OWC. The received signal of OWC over strong turbulence channels is assumed to be a mixture of K-distributed fading and Gaussian distributed thermal noise. In order to mitigate the fading induced by turbulence, the decision threshold-updating algorithm based on second and higher order cumulants is proposed, which is able to operate in an unknown turbulence environment. The performance of the adaptive processing scheme has been evaluated by means of Monte Carlo simulations. It is shown that the proposed approach proves valuable for a limited number K of memory data.

关 键 词：Optical wireless communication ATMOSPHERIC TURBULENCE K-distributed adap- tive detection. 

分 类 号：TN929.1[电子电信—通信与信息系统]