东南大学学报（自然科学版）2016，Vol.46Issue(5)：912-916,5.DOI:10.3969/j.issn.1001-0505.2016.05.002
改进DCO-OFDM系统中的接收端检测算法
Improved detection algorithm at receiver of DCO-OFDM system
摘要
Abstract
To prevent the performance degradation of DC biased optical orthogonal frequency division multiplexing (DCO-OFDM)system caused by clipping distortion,the optimization of the detection algorithm in the double clipped system was studied.The considerations which are not applicable to the maximum likelihood(ML)algorithm in DCO-OFDM system were analyzed,and two improved iterative algorithms were proposed:①obtaining the precipitation signal of ML algorithm by updating the original estimate sequences on the iterative estimate of residual clipping noise;② whitening the clipping noise by weighted factor,makes the maximum likelihood estimation algorithm satisfy the condition of the best linear detection,and obtains the precipitation signal of the receiver by the itera-tive algorithm.Though the improved iterative algorithms have a high degree of complexity,com-pared with the ML algorithm,the system link error rate performance is improved.关键词
可见光通信/光正交频分复用/迭代接收/最大似然检测Key words
visible light communication/optical OFDM (orthogonal frequency division multiple-xing)/iterative receiving/maximum likelihood分类
信息技术与安全科学引用本文复制引用
张明轩,张在琛..改进DCO-OFDM系统中的接收端检测算法[J].东南大学学报（自然科学版）,2016,46(5):912-916,5.基金项目
国家自然科学基金资助项目（61571105，61501109，61223001）、江苏省自然科学基金资助项目（BK20140646）． （）
