| 一种新的扩频通信非平稳干扰抑制技术 |
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| 引用本文： | 朱丽平,胡光锐,朱义胜,宋阳.一种新的扩频通信非平稳干扰抑制技术[J].上海交通大学学报,2004,38(2):172-174. |
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| 作者姓名： | 朱丽平 胡光锐 朱义胜 宋阳 |
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| 作者单位： | 1. 上海交通大学,电子工程系,上海,200030
2. 大连海事大学,信息工程学院,大连,116026 |
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| 基金项目： | 国家自然科学基金资助项目(60172018) |
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| 摘 要： | 提出用自适应多分辨正交变换(AHLOT)对扩频系统中的非平稳干扰进行跟踪并消除。与时域多分辨重叠变换(HLT)对时域信号的传统二进制非均匀划分不同，AHLOT根据非平稳干扰信号时频结构的时变特性，选择与干扰信号相匹配的最佳基函数，对信号进行自适应二进制非均匀分割，仿真结果表明，基于AHLOT的时频干扰对消器可增强接收机的鲁棒性，有效抑制时变非平稳干扰。
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| 关 键 词： | 扩频通信 自适应多分辨重叠正交变换 多分辨重叠变换 非平稳干扰 |
| 文章编号： | 1006-2467(2004)02-0172-03 |
| 修稿时间： | 2003年3月25日 |
A Novel Nonstationary Interference Rejection Technique in Spread Spectrum Communications |
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| ZHU Li-ping,HU Guang-rui,ZHU Yi-sheng,SONG Yang.A Novel Nonstationary Interference Rejection Technique in Spread Spectrum Communications[J].Journal of Shanghai Jiaotong University,2004,38(2):172-174. |
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| Authors: | ZHU Li-ping HU Guang-rui ZHU Yi-sheng SONG Yang |
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| Institution: | ZHU Li-ping~1,HU Guang-rui~1,ZHU Yi-sheng~2,SONG Yang~1 |
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| Abstract: | Adaptive hierarchical lapped orthogonal transform (AHLOT) was proposed to track and reject the nonstationary interference in spread spectrum communications. AHLOT differs from hierarchical lapped transform (HLT) in that the former produces an arbitrary dyadic nonuniform time axis split, which can be adapted to the signal time-frequency structure, while the latter pays no attention to the signal structure and produces fixed dyadic split. A fast dynamic programming algorithm is utilized to select the basis, which matches the interference best, from a library of lapped orthogonal bases.The simulation results demonstrate the improved BER performance and increased robustness of the proposed receiver in the presence of nonstationary interference. |
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| Keywords: | spread spectrum communication adaptive hierarchical lapped orthogonal transform (AHLOT) hierarchical lapped transform (HLT) nonstationary interference |
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