| 加权叠加结构滤波器组动态信道化结构研究 |
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| 作者姓名： | 马宏 张超 焦义文 |
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| 作者单位： | 中国人民解放军航天工程大学 |
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| 基金项目： | 国家自然科学基金资助项目(91738201) |
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| 摘 要： | 针对传统DFT多相结构滤波器组动态信道化结构要求系统过采样因子必须为整数,限制了参数设置的灵活性的问题,将灵活高效的加权叠加(WOLA)结构滤波器组引入动态信道化结构。通过公式推导得到WOLA综合滤波器组的实现结构,进而设计了基于WOLA结构滤波器组的动态信道化结构。仿真结果表明,设计的动态信道化结构解除了系统过采样因子必须为整数的限制,增强了参数设置的灵活性,同时与DFT多相结构滤波器组动态信道化结构相比,重构误差减小了一个量级,具有良好的重构特性。
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| 关 键 词： | 动态信道化 加权叠加(WOLA)结构 灵活性 重构误差 |
Research on dynamic channelization structure based on WOLA filter bank |
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| Authors: | MA Hong ZHANG Chao JIAO Yiwen |
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| Institution: | (Space Engineering University of PLA, Beijing 101416, China) |
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| Abstract: | Aiming at the problem that the dynamic channelization structure based on traditional DFT polyphase structure filter bank requires an integer oversampling factor, which limits the flexibility of parameter setting, a flexible and efficient Weighted Overlap-add(WOLA) filter bank is introduced into the dynamic channelization structure. The implementation structure of WOLA integrated filter bank is obtained through the formula deduction, and the dynamic channelization structure based on WOLA filter bank is designed. The simulation results show that the designed dynamic channelization structure releases the limitation of integer oversampling factor, which enhances the flexibility of parameter setting. Compared with the dynamic channelization structure based on DFT polyphase structure filter bank, the reconstruction error of the dynamic channelization structure based on WOLA filter bank decreases by an order of magnitude. |
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| Keywords: | Dynamic channelization WOLA structure Flexibility Reconstruction error |
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