光学精密工程2017，Vol.25Issue(10)：2759-2766,8.DOI:10.3788/OPE.20172510.2759
采用隐序列估计无线光信道时直流偏置的消除
DC offset elimination in wireless optical channel estimation by employing implicit sequence
摘要
Abstract
For the DC offsets caused by traditional implicit sequence based channel estimation in wire-less optical communication links ,a novel implicit sequence based channel estimation method was pro-posed to eliminate the DC offsets .Some key factors affecting the system performance were investiga-ted .The maximum output Signal-to-Noise Ratio (SNR) criterion was used to derive the optimal pow-er allocation factor .Then ,a simulation experiment was performed to evaluate its mean square error , bit error rate and computational complexity .The results show that the proposed method effectively e-liminates the influence of DC offset .on the system performance .Compared to the traditional method , the mean square error is reduced by about 1/2 and the bit error rate is significantly improved .Under the optimal power distribution conditions ,when the bit error rate is 4 × 10-3 ,the SNRs of 0 .2 and 0 .4 DC offset scenarios are improved by about 2 dB and 6d B ,respectively ,w hile the computational complexity is only increased by 14 .2％ .关键词
无线光通信/隐序列信道估计/直流偏置/功率分配因子Key words
wireless optical communication/implicit training sequence channel estimation/DC offset/power allocation factor分类
信息技术与安全科学引用本文复制引用
王惠琴,胡秋,黄瑞,曹明华..采用隐序列估计无线光信道时直流偏置的消除[J].光学精密工程,2017,25(10):2759-2766,8.基金项目
国家自然科学基金资助项目(No.61465007,No.61265003) （No.61465007,No.61265003）
兰州理工大学博士基金资助项目(No.14-0232) （No.14-0232）
