| 扩频通信中多个宽带Chirp干扰的识别与抑制 |
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| 引用本文： | 于凤芹,曹家麟,屈百达.扩频通信中多个宽带Chirp干扰的识别与抑制[J].辽宁工程技术大学学报(自然科学版),2005,24(4):570-572. |
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| 作者姓名： | 于凤芹 曹家麟 屈百达 |
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| 作者单位： | 1. 江南大学,通信与控制工程学院,江苏,无锡,214122
2. 上海大学,机械电子与自动化学院,上海,200072 |
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| 基金项目： | 江苏省自然科学基金资助项目(BK2002068) |
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| 摘 要： | 根据宽带Chirp干扰信号在与其调频斜率一致的分数阶傅里叶变换域呈现冲激函数特征，对接收的信号进行连续阶数的分数阶傅里叶变换，在适当的阈值下搜索并剔除其局部极大值后再进行反变换，从而对直接序列扩频通信系统中多个宽带Chirp干扰逐一识别和剔除，该方法计算量适中，且对干扰的强弱有较大的适应范围，仿真实验结果证明了这种方法的有效性。
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| 关 键 词： | 多个宽带Chirp干扰 干扰抑制 分数阶傅里叶变换 直接序列扩频通信 矿井通信 |
| 文章编号： | 1008-0562(2005)04-0570-03 |
| 修稿时间： | 2004年5月18日 |
Multi-chirps interference identification and excision in direct sequence spread spectrum communications |
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| YU Feng-qin,CAO Jia-lin,QU Bai-da.Multi-chirps interference identification and excision in direct sequence spread spectrum communications[J].Journal of Liaoning Technical University (Natural Science Edition),2005,24(4):570-572. |
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| Authors: | YU Feng-qin CAO Jia-lin QU Bai-da |
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| Abstract: | Based on the impulse characteristic presenting the Chirp jamming in the FRFT domain, the identification and excision for the multi-chirps jamming in DSSS communications system is proposed, which implements FRFT for received signal and then searches and eliminates the local maximum above a threshold, and then makes invert FRFT so that the interference is identified and removed one by one. This method has moderate computation and adaptability to interference bound. The simulation results have shown the validity of the proposed method. |
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| Keywords: | multi-chirps jamming interference excision fractional fourier transform (FRFT) direct sequence spread spectrum (DSSS) mine communications |
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