| 时变光无线信道下判决反馈自适应接收方案 |
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| 引用本文： | 徐海峰,刘贤德.时变光无线信道下判决反馈自适应接收方案[J].华中科技大学学报(自然科学版),2001,29(9):75-77. |
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| 作者姓名： | 徐海峰 刘贤德 |
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| 作者单位： | 华中科技大学光电子工程系 |
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| 摘 要： | 针对光天线（WOC）信道的时变特性,扩充红外数字协会（IrDA）标准定义的试探分组均训练序列,提出完成带判决反馈的WOC自适应接收方案。利用维持比算（VA)判决,给出与“硬判决”自适应方案的比较结果,通过对侈种信道条件的实验比较,结果表明WOC的最佳均衡估计深度可取为9,IrDA的“试探分组”取10Kbits为宜,通信半径改善比为1．5。
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| 关 键 词： | 光无线通信 反馈判决自适应均衡器 信道冲激响应 光无线信道 维持比算法 |
| 文章编号： | 1000-8616(2001)09-0075-03 |
| 修稿时间： | 2001年2月23日 |
Decision Feedback Adaptive Receiver for WOC Channel with Time-variance |
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| Xu Haifeng Liu Xiande Lect., Dept. of Optoelectronic Eng.,HUST,Wuhan ,China..Decision Feedback Adaptive Receiver for WOC Channel with Time-variance[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2001,29(9):75-77. |
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| Authors: | Xu Haifeng Liu Xiande Lect Dept of Optoelectronic Eng HUST Wuhan China |
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| Institution: | Xu Haifeng Liu Xiande Lect., Dept. of Optoelectronic Eng.,HUST,Wuhan 430074,China. |
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| Abstract: | The channel of Wireless Optical Communication(WOC) has the time varied property under motion condition. A adaptive equalizer with feedback decision used in WOC receiver is proposed in which Sniffing packets from the specification of IrDA are used as training sequence. The output decision of the method is made by viterbi algorithm (VA) and the results are compared with that from hard decision. The simulation results show that the optimal delay length of estimator is equal to 9, and the length of "Sniffing Packet" in IrDA is at least 10?kbits. The improved ratio of communication radius in the method is 1.5. |
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| Keywords: | wireless optical communication adaptive equalizer with feedback decision impulse response of channel |
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